Malicious PDF — malware analysis report

Static analysis result for SHA-256 e61a777196085969…

MALICIOUS

PDF

73.7 KB Created: 2021-01-06 04:13:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 63686c5d909539489501257f9da7a19e SHA-1: 410e394684be9afa6d7bbaedf8167ba7dd0495fa SHA-256: e61a7771960859695621b8689e66ec18fb155bdc26495f860e5d2122ce9c0e7b
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to Weebly and S3-hosted PDFs, suggesting a link farm or content distribution network for malicious files. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' point towards an attempt to drive traffic to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafftec.ru/123?utm_term=waiter+job+description PDF link annotation
    • https://satobolusiv.weebly.com/uploads/1/3/1/3/131398412/7887375.pdfIn PDF document text
    • https://wumaluko.weebly.com/uploads/1/3/4/7/134716396/daxadeke-vomef.pdfIn PDF document text
    • https://cdn.sqhk.co/bafebolabefo/jfieTjh/92732204075.pdfIn PDF document text
    • https://cdn.sqhk.co/bujavenizake/LOVgdQ5/nawuluforobinuso.pdfIn PDF document text
    • https://jevavuxenexek.weebly.com/uploads/1/3/5/3/135351486/da3a8b06.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/mount_kilimanjaro_guided_tours.pdfIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/bexugajededobovonev.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/94508132905.pdfIn PDF document text
    • https://s3.amazonaws.com/padosumifubobo/53313031876.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/the_cracking_code_book_simon_singh.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fffb081-b8cc-4cc7-a852-9736dc61b038/height_of_a_zero_gravity_parabolic_flight_math_1010_intermediate_algebra_project.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/xofomiponanofa.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/digokuxafave.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6483fe8-ef4d-4f6a-a3b2-6f25e55eaa6e/doditoletewebexivirizaz.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/them_bombs_manual_pt.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/ron_clark_books.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/93311146094.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_off0000e2e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E0 5264 bytes
SHA-256: 3555c7b286291da554ca6d156b3fda2175eb1393106bc308d47c7e7c8362cf4c
font_01_sfnt_off0000f4df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4DF 10784 bytes
SHA-256: 767996a3e59debbcc08c78ae6b2a1a7069027c2ca8cdbb0f13102868e257d32e

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