Malicious PDF — malware analysis report

Static analysis result for SHA-256 96141fc6d216d9dd…

MALICIOUS

PDF

77.9 KB Created: 2021-01-03 16:08:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 336a151d326872442355ca5d082616e0 SHA-1: 9f1833a5fe7fbf7e84bfea36640f1e93f4e53209 SHA-256: 96141fc6d216d9dd9063abf8c345347ccb811bf5760adf7e43e0f5db7485dbe8
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' suggests the document is designed to host a large number of external links, likely for SEO manipulation or to distribute malicious content. The presence of an embedded URI pointing to 'trafffi.ru' further supports the attack pattern of luring users to a potentially harmful website. No scripts were extracted, but the PDF structure and embedded links are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://trafffi.ru/123?utm_term=el+amor+verdadero+segun+la+biblia PDF link annotation
    • https://bogigusojuvifu.weebly.com/uploads/1/3/4/3/134316749/af192d9e40b03.pdfIn PDF document text
    • https://lilikegemuvil.weebly.com/uploads/1/3/1/3/131398424/lufivikokevagakobaz.pdfIn PDF document text
    • https://godadonalizubo.weebly.com/uploads/1/3/1/4/131437317/fulaz.pdfIn PDF document text
    • https://ruritetij.weebly.com/uploads/1/3/4/7/134704214/junemigi.pdfIn PDF document text
    • https://tatabano.weebly.com/uploads/1/3/4/8/134850833/194521.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/ninazarila/5043048365.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc3649f7-e709-488d-8c2a-22ceeb2e8472/player_s_handbook_dungeons_dragons.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/59439899256.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8571d877-270a-4a4d-b17a-3a4da0574c84/86572375911.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/181e4360-380f-4c66-9b15-d96f69ed4fb9/peter_levine_training.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98f3e9fc-3ea0-46cd-ba0c-94c145745df0/modern_combat_6_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/safago/45766641781.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b40d0cf9-7b4c-4d20-87eb-b3fc7155f470/83980071375.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/78166446257.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6dc5cf17-4a0f-43ac-9e10-ebda471f1a51/damovunituwusijamupeg.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D3 5104 bytes
SHA-256: c964d9c8f3edb876c348fe883bade8af817b0a965bf7354f2e482221d7039f03
font_01_sfnt_off0000f514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF514 11760 bytes
SHA-256: 99f3bae481ae5d7004272906e83bfb43132952a5713a912862480e809de6bb4e
font_02_sfnt_off00011ae7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AE7 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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