Malicious PDF — malware analysis report

Static analysis result for SHA-256 0206dbf78842259f…

MALICIOUS

PDF

84.5 KB Created: 2021-06-29 11:57:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 511dc5a3b24508b855408fabcb7eba55 SHA-1: 74a7cdef53e01ea0dc5747c0b457e1c2fc7e536c SHA-256: 0206dbf78842259f7b82c556bdbc6dd6213959dd1c2a50a9fc44dab73e0a64a2
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to websites hosted on compromised CMS platforms, suggesting a link farm designed to redirect users to malicious sites. The presence of a 'callback lure' heuristic indicates a potential phishing or tech-support scam pretext. While no scripts were explicitly extracted, the ML classifier and ClamAV detection strongly indicate malicious intent, likely involving exploitation or redirection to a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://sam-global.info/files/file/6060974168.pdf In PDF document text
    • http://castanienfamily.com/clients/74558/File/58053133054.pdfIn PDF document text
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/a31826b4914bf81b30e8a8560f6cb4c8/95135450556.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3f0352662e---29556785510.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/a9d9d44f6613742541272efec54032bc/5924009343.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dcb8b650a0---6171767200.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160776bcd25b5f---89456339013.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16076b18cd0236---78422414145.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8eeb32225---68100198878.pdfIn PDF document text
    • http://esenkardeslerinsaat.com/resimlerfiles/84593412047.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a01381d94be---42396439513.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/pkf132aotjluk22h1r6ohqf1b6/82748189851.pdfIn PDF document text
    • https://mut-zur-veraenderung-hambuch.de/userfiles/file/12754952122.pdfIn PDF document text
    • https://www.adilaltinsoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607950b8c1a40---karera.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/q75dvmc83d4en6dbjfpolbk9hb/falagubenavizumopupisozu.pdfIn PDF document text
    • https://mimpiindah2.com/contents//files/46429570298.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5b6c0254ef---ziman.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc57a05a00d---fusapinokapepiwopopoxuta.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/a88cfd700b8e0c4ed56be4cafb97420a/runar.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095cf124d0ff---fasasivamamurukitipivevu.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a74f3fd6224---jobaxagopuriwawujojufoli.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160986f2bd175f---jepola.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/8f1f9334caf9661b191fc61a5dcd5644/42644433332.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/bulowogafutoferidamijamal.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7710581eca---mavigezozegisolizudujol.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/iqtc4uc4fk8igsk9ogajp2a30h/59872188135.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=rec+center+pool+reservationsPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608129880da1a---vogolomanexipisepadevonu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e862.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE862 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010074.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10074 16920 bytes
SHA-256: 05c942e8f484c736e477ec469f7d22f0681ab2537c74e19db9a1dc55b61fb7cc
font_02_sfnt_off00012cb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CB1 10476 bytes
SHA-256: 4ed0316b069bc23fd6995aedd7876e45867c4a5a876f9363f9556b3e8811e990