Malicious PDF — malware analysis report

Static analysis result for SHA-256 294d55c5a29aec5a…

MALICIOUS

PDF

60.2 KB Created: 2020-11-20 15:55:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 520041e743d6c6947ef7297d7b9c2528 SHA-1: 18cb9270e26db63cd85df934a0c2a9089cc073da SHA-256: 294d55c5a29aec5aa04a930dbd72ae6c0eb3b95e764aedf3e6040c2f7f346e37
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or malware distribution attempt. It contains numerous external links, including one to 'traffset.ru', suggesting a link farm or redirection mechanism. The presence of embedded URLs and the PDF structure point towards an attempt to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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.
  • 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://traffset.ru/123?utm_term=samoan+to+english PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384470/normal_5fae0125ba85e.pdfIn PDF document text
    • https://zulatikuwa.weebly.com/uploads/1/3/0/7/130776211/4094919.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/c0c87e5c-0017-4359-ac28-074cfdd5399d/dajipinib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e668eab2-3525-443b-aa8f-1272fef3db03/93440143339.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c390f7c2-69a3-4286-b99a-f3b7a9effd6c/79753797594.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64203fd7-a83e-425f-9bae-ada720d73d25/zolafulapuvo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d7693f6-7ecf-4767-a5a7-263ec2402409/more_properties_of_exponents_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17e380ac-f085-45a5-82fa-8c28783bea8c/wozugowi.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/claims_adjuster_trainee_interview_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47fcadb2-0e7f-4d11-8bde-e1c85cc67081/nigipoxoregiz.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_off0000b085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB085 5108 bytes
SHA-256: 5b5d8e8d91a1929bb25b4466a7380bd1bd1803b0623ace628fe30eb2cfd2580e
font_01_sfnt_off0000c1ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1BA 10432 bytes
SHA-256: 08823231c05fbd6dfa3591455e81efac3ff2640edc53d6994cd7c2071ad037db