Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f2933cafb064040…

MALICIOUS

PDF

71.3 KB Created: 2020-12-10 06:27:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51c2ab8c476942f83f4d952fc37ee69e SHA-1: 7c2400a91966036e0763b10a80e74d3f035582e4 SHA-256: 0f2933cafb064040c654948c0812711bd46cfd921f1abce764c306fe7f1b1f33
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a PDF link farm. One of the primary URLs, 'https://traffking.ru/strik?utm_term=learn+to+fly+4+cool+math', suggests a potential phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=learn+to+fly+4+cool+math
    • https://pewugitunuwirex.weebly.com/uploads/1/3/4/3/134373176/1554f401.pdf
    • https://cdn-cms.f-static.net/uploads/4453579/normal_5fa376db1a911.pdf
    • https://pinosapop.weebly.com/uploads/1/3/4/1/134131344/xegokopunivuparilumu.pdf
    • https://cdn-cms.f-static.net/uploads/4368223/normal_5f91e3a02ff03.pdf
    • https://cdn-cms.f-static.net/uploads/4365624/normal_5fa48850e7103.pdf
    • https://cdn-cms.f-static.net/uploads/4465147/normal_5fb3e871c2268.pdf
    • https://static.s123-cdn-static.com/uploads/4390071/normal_5fc5c53da5f4b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wilugugo/english_alphabet_writing_practice_book_free_download.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf8e972f8b574a0f31064/1606220011604/destiny_2_leviathan_gardens_map.pdf
    • https://uploads.strikinglycdn.com/files/e6921267-b210-496f-9206-8b3af28e41a1/home_economics_worksheet.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dca9.bin
dbc5a5b067475a896dac00afe08794759d283a05ae669461b7c634d843c9659d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA9 5072 bytes
font_01_sfnt_off0000edd5.bin
b0078828a8e0d302f296393451a26f6328cb79cf52b08e006bd04a6f6cf90e6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD5 10140 bytes

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