Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cc8be569377564d…

MALICIOUS

PDF

94.3 KB Created: 2021-05-12 07:37:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 4e2e09420cd43d3f83732d859f9fffc2 SHA-1: 26e14a85e669263ed48d28099f6718bb1e92cd8b SHA-256: 4cc8be569377564db095423632328c67cd8a89c62760e1b9de924299e1b6e512
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, with one prominent link pointing to 'seumenha.ru', which is flagged as suspicious. Heuristics indicate a 'PDF_SEO_LINK_FARM' and 'PDF_URI', suggesting the document is designed to drive traffic to external sites. The presence of a 'SE_INVOICE_LURE' and 'SE_CALLBACK_LURE' heuristic further supports a phishing or scamming intent. While no scripts were explicitly extracted, the PDF structure and linked content suggest an attempt to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://seumenha.ru/strik?utm_term=what+is+the+best+love+poem+ever+written PDF link annotation
    • https://pikitepilizoj.weebly.com/uploads/1/3/5/3/135332880/ccc7d.pdfIn PDF document text
    • https://rokejowavati.weebly.com/uploads/1/3/4/2/134265467/durexosenogimobubo.pdfIn PDF document text
    • http://maxobujixeweden.sportsontheweb.net/ativan_davis_drug.pdfIn PDF document text
    • https://cdn.sqhk.co/joxipadij/fWdjhVJ/meetme_apk_download_for_pc.pdfIn PDF document text
    • https://bilemupu.weebly.com/uploads/1/3/4/6/134654663/1332070.pdfIn PDF document text
    • https://cdn.sqhk.co/senosekagoko/ihJggsB/25524115153.pdfIn PDF document text
    • https://cdn.sqhk.co/womawuxinuge/dibjghb/physics_mcq_questions_class_9_motion.pdfIn PDF document text
    • https://mutolumikiwow.weebly.com/uploads/1/3/1/8/131872082/344a2cbefb61.pdfIn PDF document text
    • http://jilavixit.medianewsonline.com/the_bastard_of_istanbul_online_free.pdfIn PDF document text
    • https://cdn.sqhk.co/kigowabalo/aibghjb/25702986358.pdfIn PDF document text
    • https://cdn.sqhk.co/xuluriwu/hbie6gg/ww2_us_fighter_pilot_uniform.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b792321-13be-410d-80fd-ca3d186c02a4/amazing_bible_timeline.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30b8a5d6-28a8-405c-903d-63eda7dd1781/breach_of_contract_lawyer_california.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/invoker_guide_skill.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/rudufoxumuvobido.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3434497-573d-4585-85bc-c731176e5fee/28965163089.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/7596165580.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/two_step_equations_fractions_worksheet_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/pofazemipivebabatuligetis.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/27619106560.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/what_questions_to_ask_in_an_interview_as_an_interviewee.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d9f79f3-2a5d-4d79-99c5-d785738f7bbe/who_is_the_best_real_estate_agent_near_me.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13266 5364 bytes
SHA-256: c11bf37636bedb8ddc62dbca1d518ae2ef3d896e46755093a72d9543857f3442
font_01_sfnt_off00014489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14489 11484 bytes
SHA-256: 2af038c2d38b173d610163666beb83fd22b3d2ef6da62a21c8fbb72294c9b4f7