Malicious PDF — malware analysis report

Static analysis result for SHA-256 20e4521cc5b21d08…

MALICIOUS

PDF

76.3 KB Created: 2021-01-07 00:16:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: dda3e82fd912bbca66afbe2fe2832e00 SHA-1: 9fc2b74152c49de765bdcf523acb841e19f34dfd SHA-256: 20e4521cc5b21d088fdf4a9257d33efdf4a67079432ce5fc119054d5265a7745
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, with one specifically pointing to 'traffking.ru', suggesting a phishing or malicious redirection attempt. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, further supporting this. ClamAV detection as 'Pdf.Phishing.Trojan' confirms the malicious nature. No scripts were extracted, but the overall structure and linked URLs point towards a malicious document designed to redirect users.

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://traffking.ru/123?utm_term=marcy+weight+bench+instructions PDF link annotation
    • https://zunobogodosi.weebly.com/uploads/1/3/4/6/134630435/1147578.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409420/normal_5ff63392d89da.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459320/normal_5fc833bab72d2.pdfIn PDF document text
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/1275820.pdfIn PDF document text
    • https://detaxotipag.weebly.com/uploads/1/3/4/7/134730838/b2b1a284f.pdfIn PDF document text
    • https://lonopenofof.weebly.com/uploads/1/3/4/8/134895818/e4eb85f2bf.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/fosagobomap/tikolewipopexoxef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/daae0780-3b0f-44c8-a3ae-bcbccc86c3c9/32569515842.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/list_types_of_tour_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a73afdc8-85f8-43d0-b35a-273c07fd9311/64657592176.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/91832059471.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e7fbf9f-ddb3-45d9-acaf-334d702f1dfe/jedupafesifinolinipiwobu.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/biblia_judeo_cristiana.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_off0000ee5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE5B 5368 bytes
SHA-256: d81f30c45dd39e455cbd3b56e9a0cd6a3d7a2614c773aee164c1b24c7dcaffca
font_01_sfnt_off000100bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100BC 10436 bytes
SHA-256: 97402c5412475ca7f4741227b112faef1e910b5160c9ce0155d70a5b0417be22

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