Malicious PDF — malware analysis report

Static analysis result for SHA-256 3956852a06ce407c…

MALICIOUS

PDF

65.2 KB Created: 2020-11-24 07:22:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8172c908457cbc205a2283aff6527ff SHA-1: 69ebbf493960295054435d4eda18c5c1dc99ef38 SHA-256: 3956852a06ce407c3effede302eadfa1fb400f2cf808498724f08a9c580e0e83
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one identified as a potential lure for an advance-fee scam. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs suggests an attempt to redirect the user to malicious sites or download additional payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://trafficel.ru/strik?utm_term=total+control+remote+urc+11-2910+man
    • https://cdn-cms.f-static.net/uploads/4393188/normal_5f8e88d328097.pdf
    • https://cdn-cms.f-static.net/uploads/4375088/normal_5f922647d4e57.pdf
    • https://mazazogadof.weebly.com/uploads/1/3/4/3/134374066/sedojusufi.pdf
    • https://cdn-cms.f-static.net/uploads/4367961/normal_5fa02cff7fce4.pdf
    • https://cdn-cms.f-static.net/uploads/4470826/normal_5faf520db7eb9.pdf
    • https://cdn-cms.f-static.net/uploads/4447280/normal_5fa81e8e2bc75.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/5e988e30-2c04-439f-9005-5acff05a6c57/guide_gear_layout_blind_review.pdf
    • https://s3.amazonaws.com/tibitexil/noninixijebetibi.pdf
    • https://uploads.strikinglycdn.com/files/4792bfa8-6114-444a-b498-f5ea5983836c/marijuana_laws_by_state_norml.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c2d3.bin
e415cf6f752665fe6e82035c15a5a440bedcdb70a52bcf0be8f10bbb6aaa815e
pdf-font-stream PDF embedded font (sfnt) at offset 0xC2D3 5232 bytes
font_01_sfnt_off0000d494.bin
ab155283acd82099938d7e46014488eff0c622471a7429ba84639398b1f12944
pdf-font-stream PDF embedded font (sfnt) at offset 0xD494 10552 bytes