Malicious PDF — malware analysis report

Static analysis result for SHA-256 0169fe00e7f49e35…

MALICIOUS

PDF

133.6 KB Created: 2021-07-16 22:08:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 374b3d9fb7c775a05fbaf0a9b183a144 SHA-1: 3794ce69700bb26823f81b954b9efc78663a0a59 SHA-256: 0169fe00e7f49e3597b177c61e44085e56a3b4d2af3f0b38f119c1d95312e9d4
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of links, many pointing to compromised WordPress sites, which are likely intended to redirect users to malicious content or phishing pages. The heuristic 'SE_CALLBACK_LURE' suggests a potential callback phishing or tech-support scam pretext, although the document body itself is heavily obfuscated and unreadable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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 https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/msse0cfdat1er6f7omnv61799b/14417794839.pdf In PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/h1lcacobi507fg6kpi3p8j2smt/jibulewumazofetelow.pdfIn PDF document text
    • http://citywideok.com/clients/75789/File/43572401825.pdfIn PDF document text
    • http://biurod9.pl/public/userfiles/file/kivugepozizimuxusaxa.pdfIn PDF document text
    • http://bestbelly.org/content/files/files/41083289712.pdfIn PDF document text
    • https://www.sensiblemachines.com/ckfinder/core/connector/php/files/womifuvolakowofaxetevez.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/dae79e15d91ace93c35f6dc00175f2d7/93481753979.pdfIn PDF document text
    • https://shipnhanh247.vn/asset/files/dimukesuwapijixabon.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/7bbd736e491fd5453053be4877c760f1/56319168581.pdfIn PDF document text
    • http://timebymtm.com/upload/files/mobusuta.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16083756605b9a---sebulomiruxalexafa.pdfIn PDF document text
    • http://fhhsclassof70.com/clients/4/42/42ce21dc30e429aa976ba070b22ccf93/File/temefebepomuvumajoto.pdfIn PDF document text
    • http://stattus.com/assets/file/55625301573.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092bc137e373---belorilulatojurar.pdfIn PDF document text
    • https://soalmatematik.com/userfiles/file/rafupejinirijebivoxujar.pdfIn PDF document text
    • https://festival.bg/fckeditorfiles/file/59308209708.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16075f8888f5e4---78882666529.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606dcc57da6da---57989234138.pdfIn PDF document text
    • http://www.yeosung21.or.kr/ckfinder/userfiles/files/1626121596.pdfIn PDF document text
    • http://bodegaadrover.com/userfiles//imagenes/wowiboxo.pdfIn PDF document text
    • http://teraval.cz/res/file/widunatiwonajapufi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=after+hours+answering+service+law+firmPDF link annotation
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a80a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A80A 11016 bytes
SHA-256: 972236354c17b1ac251f3ab96c1773d50603d2052e596a776aafaba4932b6bd4
font_01_sfnt_off0001c196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C196 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001d9a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D9A8 17828 bytes
SHA-256: 41d9131bd1f16223e677b771e256c4de46a366f9d75a11e0a40713b554fc61bb

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