Malicious PDF — malware analysis report

Static analysis result for SHA-256 230bbca608674b0c…

MALICIOUS

PDF

57.8 KB Created: 2020-11-29 17:41:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: df1b86cc5658d6dd0e3f939238be94c2 SHA-1: b9083bf1fedaab691d228afe9ed1b136e43d993a SHA-256: 230bbca608674b0c0fe9f97ffbcbdd92df1fcb324afdf0c50bf3cba3b664ca9f
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 trojan threat. It contains a large number of external links, including a primary link to 'trafffi.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 external resources, likely for malicious software distribution or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafffi.ru/strik?utm_term=camera360+apk+uptodown PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4404308/normal_5fa7a0a1e02b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407301/normal_5f932b9ad8fc1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392853/normal_5f93eb197adf8.pdfIn PDF document text
    • https://fosarujup.weebly.com/uploads/1/3/4/6/134624161/7080017.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392667/normal_5fa1f858193e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366400/normal_5fbcf15281604.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/923af2ae-a549-43e0-9aec-f5674a2db0bc/wuvimojujelabelosafipipi.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/using_modifiers_correctly_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/9155904781.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0a208cf-75be-4da9-91bd-965bcd6777fb/engineering_economy_7th_edition_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9162cd32-8323-4499-95f3-f5cec1687420/63303998615.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_off0000a896.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA896 5416 bytes
SHA-256: 203cde5d715a8c095e8056d209bff3d8d71b9a63fdfcfe18923763875c6dc5d2
font_01_sfnt_off0000baf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAF1 9348 bytes
SHA-256: d41f9ac74cd14752cf43c08869ed7bc045589b68131c4c57ab8a2d6f8695f1c8

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