Malicious PDF — malware analysis report

Static analysis result for SHA-256 4270e2c197196205…

MALICIOUS

PDF

64.9 KB Created: 2020-11-21 22:57:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a78b202a982f4b5bf272607c68d259cf SHA-1: 159cd2b953edaa56931665bcba0d8b960eff2ab4 SHA-256: 4270e2c197196205500fed772c37d94fd1c244ac8e95449cfc623faf73b24d89
176 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or redirection mechanism. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of embedded URLs and the 'Callback phishing phone lure' heuristic suggest the document is designed to trick the user into interacting with malicious content or services.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://trafffe.ru/123?utm_term=swtor+max+level+cap PDF link annotation
    • https://bematurom.weebly.com/uploads/1/3/4/8/134886193/1e81a7b4ae.pdfIn PDF document text
    • https://pevinuwipe.weebly.com/uploads/1/3/0/8/130873962/f5f866b910c2.pdfIn PDF document text
    • https://joxenawofin.weebly.com/uploads/1/3/4/3/134342561/levugagagar_vonupumur_ladikipidebodi.pdfIn PDF document text
    • https://pudonaneguk.weebly.com/uploads/1/3/4/7/134767047/fojaragoxefuponodo.pdfIn PDF document text
    • https://zuwumepegowivos.weebly.com/uploads/1/3/1/0/131069935/9124817.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/nesubine.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/d2c76718-bb85-4be8-84e7-2bb8b9c1b139/on_the_run_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54a76525-1805-4976-a0fa-b84282f670d5/3d_ultra_pinball.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6fee006-b899-41ba-b285-898195ec361c/roropebevizopupexo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/584525d2-fb47-4fa7-8de3-cd26e25fb4db/monster_manual_5e_the_trove.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0dc1615-bd1d-4bdd-a6b6-3e1f8c6e0f96/kewulusuvitez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27f06d73-2d2e-4fd8-906d-bb44b60cde17/besadorolobazoka.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_off0000c145.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC145 5224 bytes
SHA-256: eba129959d5b1cb9e052745ec320d4ae088f32f681bc804d9e8468daa7ae5df9
font_01_sfnt_off0000d30d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD30D 10664 bytes
SHA-256: 03167f454576e6030632c4f94a54d4e400932630ead2657e9712ce0aff566a58

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