Malicious PDF — malware analysis report

Static analysis result for SHA-256 a689ca1b7aad5941…

MALICIOUS

PDF

96.0 KB Created: 2021-03-31 02:42:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8da2caebb5cf33dacc7a2ee7837bec0f SHA-1: b5859f4dea545fc8ecf929c884f5dbabae9bbb6e SHA-256: a689ca1b7aad5941189f8f835ba7f23870d7d4fffb4f688d8ccd90fc325cd210
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains a link farm with numerous external PDF links, including one disguised as a tile cutter advertisement, which redirects to a suspicious URL. The document also exhibits characteristics of a callback phishing lure, suggesting an attempt to trick users into contacting a malicious entity. The presence of multiple external links and the ML detection strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://vilenefex.ru/strik?utm_term=sigma+1200mm+tile+cutter PDF link annotation
    • https://s3.amazonaws.com/zarevizebi/75013682138.pdfIn PDF document text
    • https://mabanopovofed.weebly.com/uploads/1/3/1/4/131453130/gedewepuraraw-kamabikidadeg-luwomalefo-pidixofofusoj.pdfIn PDF document text
    • https://s3.amazonaws.com/jawusawar/bescherelle_la_conjugaison_pour_tous.pdfIn PDF document text
    • http://barajofa.mywebcommunity.org/managing_political_risk_in_international_business.pdfIn PDF document text
    • https://jigaxokere.weebly.com/uploads/1/3/4/6/134622899/popef.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/wezepebovanoruk.pdfIn PDF document text
    • https://xebolefijepipol.weebly.com/uploads/1/3/0/7/130739937/gowadumel.pdfIn PDF document text
    • https://talunijepi.weebly.com/uploads/1/3/4/5/134599753/7efb9c834d3.pdfIn PDF document text
    • https://jupepirime.weebly.com/uploads/1/3/4/3/134313464/didos_milirop.pdfIn PDF document text
    • http://kapabifidi.sportsontheweb.net/intoxicacion_fenobarbital.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418175/normal_5fd8b89b007f4.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/ce_certified_full_form.pdfIn PDF document text
    • https://delimilakemasuj.weebly.com/uploads/1/3/4/4/134400920/f7b0520dbf.pdfIn PDF document text
    • http://rusewigojubilon.mygamesonline.org/dujamodozozibojel.pdfIn PDF document text
    • https://rixafivi.weebly.com/uploads/1/3/1/3/131380000/9977853.pdfIn PDF document text
    • http://tuduvodakep.mypressonline.com/french_to_english.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406241/normal_5fc6c2f0264eb.pdfIn PDF document text
    • http://vuvulusigi.scienceontheweb.net/wegisukuxij.pdfIn PDF document text
    • http://xogunajeraxuda.mywebcommunity.org/4540296608.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/hp_deskjet_2132_printer_driver_for_windows_7_64_bit.pdfIn PDF document text
    • http://kamikofonem.mygamesonline.org/81597345403.pdfIn PDF document text
    • https://visufevulun.weebly.com/uploads/1/3/4/3/134310134/nulupevobap_xowesirirovi_nalozufa.pdfIn PDF document text
    • http://xelasurugopu.mywebcommunity.org/waketosimoxisidazawuk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zijiwaras.onlinewebshop.net/wewefuwidafezum.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://scripts.sil.org/OFLIn 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_off000121b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121B6 5368 bytes
SHA-256: fc64428f51ab72140c065186a867ca28e797801421da62258960d051e6d3be0b
font_01_sfnt_off000133e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133E9 11996 bytes
SHA-256: 85413dca7dd21bccca1a9d6a3f14349e02fcbeb2bab758f40bd2bea1687892a6
font_02_sfnt_off00015ce7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CE7 16204 bytes
SHA-256: 73bb1f519e29941fc98367ae33a8b679223d41029fbf73fb5c585da9ec8c2502