Malicious PDF — malware analysis report

Static analysis result for SHA-256 7974705864a2b093…

MALICIOUS

PDF

66.3 KB Created: 2020-12-01 03:11:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: b7557782bf5ac51b3fa99f769e6f6aa8 SHA-1: 17b33966b9569f5338b87923d11b033dc48110e4 SHA-256: 7974705864a2b093656d61d4e36a365ddf87bf450790c65e44e9c8fbf47ac26b
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a large number of external links, with one prominent URL pointing to 'trafffe.ru', suggesting a link farm or phishing lure. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest an attempt to redirect users to malicious content.

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://trafffe.ru/strik?utm_term=x+chair+glenn+beck PDF link annotation
    • https://bawoxuvebi.weebly.com/uploads/1/3/4/8/134886771/ranadekeko-vogijamupopeso-vewapumu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf6c73bc819f1cf4d11f2a/1606380672910/mugenidazufiluniwusik.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/kijazezigawovo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e3ecc14dfd36fef16b99/t/5fc24490645712565486c9b8/1606567057795/9886766094.pdfIn PDF document text
    • https://s3.amazonaws.com/vojapu/rpc_computer_science_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/video_maker_windows_7_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wovisak/febepimavologonosone.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/34855662095.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0df19c3e-6da6-4e5f-963e-9a72dbea571d/ferub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/391c6e19-b646-48eb-a4fe-bf8095b9a08e/cal_poly_slo_football_schedule_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c48900af-a171-4473-b3bb-b2f2d890b7f4/guitar_pro_6_keygen_embrace.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f3eeb55-22d2-45c8-ac76-7565657f9665/27669181591.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b36a2acb-9068-49af-84d9-67b9f94d8d96/87515013481.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/bachon_ki_kahaniyan_download.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_off0000c77b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC77B 5064 bytes
SHA-256: 36b3c42847e9c075a261be82c0d249138e533ef6e119feb6ecab85b96b5423e2
font_01_sfnt_off0000d8b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B0 10664 bytes
SHA-256: 0a426fabad2b734cc85eef8163986602f30d233a7da81f42dd9474eb513c1e7d

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