Malicious PDF — malware analysis report

Static analysis result for SHA-256 d560164686b640f3…

MALICIOUS

PDF

82.1 KB Created: 2021-09-12 06:49:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6915f23f6984059489cc9a20d0065e1a SHA-1: e4a08ee9591aa3d64d612df459d6f9d2e1a62b8f SHA-256: d560164686b640f3a2112e7366cd67426b6b803a7ff5ea2f934335b35fcdfed9
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF that contains a link farm and is detected by ClamAV as Pdf.Phishing.Trojan. The SE_CALLBACK_LURE heuristic indicates the document likely prompts the user to call a phone number, a common tactic in phishing and tech-support scams. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure suggest it's designed to lead users to malicious content or initiate a fraudulent interaction.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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) 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://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f1a50498b0---firarekij.pdf In PDF document text
    • http://htbestcomputer.com/media/ftp/file/pitaginukujulutomewa.pdfIn PDF document text
    • http://thienminhgroup.com/uploads/userfiles/file/jatodidonagunigej.pdfIn PDF document text
    • http://7seapharmtech.com/Uploadfiles/files/kidisav.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/7ed5eddd11e9d3592371f57a39d71ed9/87988237525.pdfIn PDF document text
    • http://agilesolutions.in/uploads/90227593399.pdfIn PDF document text
    • http://medeeatour.ro/mm/file/39912442269.pdfIn PDF document text
    • http://gsxr.hu/userfiles/file/xedezabezitalabiv.pdfIn PDF document text
    • http://brenderup.ro/mm/file/5748522949.pdfIn PDF document text
    • https://fibaquitaine.fr/cebatrama/userfiles/files/34569900608.pdfIn PDF document text
    • http://eortak.com/img/fck_temp/file/babojokeg.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/dd0081fa27de43e3e6cb57479a67d631/76898478335.pdfIn PDF document text
    • https://bhopalliteraturefestival.com/mpsdp/uploads/files/nekuvadibop.pdfIn PDF document text
    • https://alistairmills.com/ckfinder/userfiles/files/xovalet.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/2qbssa605c55plb1e4tk15her2/23810449729.pdfIn PDF document text
    • http://encino.ilovepokebar.com/uploads/files/9558305738.pdfIn PDF document text
    • http://levotst.com/uploads/files/sadisiperegepitepeb.pdfIn PDF document text
    • https://searchkar.com/ci/userfiles/files/xekafenivowudanoga.pdfIn PDF document text
    • https://rosebankprimary.co.za/inc/ckfinder/userfiles/files/26317684838.pdfIn PDF document text
    • http://m2m2design.com/userfiles/81470431495.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/a7fba06e8a2f217140b85a0f3f917e7b/67018878932.pdfIn PDF document text
    • https://termofriz.rs/files/45853492238.pdfIn PDF document text
    • http://nfc-lampang.com/user_img/files/53446814990.pdfIn PDF document text
    • http://henanshuangxin.com/d/files/4232009259.pdfIn PDF document text
    • http://sibaco.ru/ckfinder/userfiles/files/85203992505.pdfIn PDF document text
    • https://trsoftyazilim.com/genelresimler/file/dubazusitenobaxubuzixax.pdfIn PDF document text
    • http://portaldo.eu/contenuti/upload/file/tamijeserowewokigapofux.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=c%23+winform+pdf+viewerPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0FC 18592 bytes
SHA-256: e36ba595e2e73d08a1b1691928e99392da881ea1733579587bd88d99b76549ef
font_01_sfnt_off000110d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000128ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128EA 9104 bytes
SHA-256: fe4a9ad32d6d12da45ce8861a1e6e511df5579fd33367a5c4d1c9e774d301804