Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e7c37027ae229f1…

MALICIOUS

PDF

70.3 KB Created: 2020-11-21 17:43:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97a21d62ef7952ff6b5adcaa98f6df11 SHA-1: 19e57df56a631c1348a86e44f27fa7473fbf560f SHA-256: 2e7c37027ae229f12e16c5b6da6de583d7d125ed2444de245431053a67a869d6
126 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan variant. It contains numerous embedded URLs pointing to disposable hosting, indicating a link farm designed to redirect users. The primary URL, 'https://traffine.ru/123?utm_term=which+way+is+the+wind+blowing+tomorrow', is likely the initial lure, potentially leading to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffine.ru/123?utm_term=which+way+is+the+wind+blowing+tomorrow
    • https://cdn-cms.f-static.net/uploads/4369920/normal_5fa28b7796ec2.pdf
    • https://lilawowawumoxo.weebly.com/uploads/1/3/1/4/131453384/bigawav.pdf
    • https://vavuxajibibugu.weebly.com/uploads/1/3/4/4/134472661/guzoli.pdf
    • https://cdn-cms.f-static.net/uploads/4421336/normal_5fb453cd4fc3f.pdf
    • https://botubadixebom.weebly.com/uploads/1/3/1/4/131407995/vuses.pdf
    • https://doleroxewaforud.weebly.com/uploads/1/3/4/3/134322791/7141635.pdf
    • https://rajomiluti.weebly.com/uploads/1/3/2/6/132682989/f0bf9fc11c86e3.pdf
    • https://cdn-cms.f-static.net/uploads/4375703/normal_5fa0552bd1f2d.pdf
    • https://runebipunozup.weebly.com/uploads/1/3/1/4/131406604/b3f0c5d4ced9.pdf
    • https://guzifako.weebly.com/uploads/1/3/4/0/134096492/1cdb708.pdf
    • https://cdn-cms.f-static.net/uploads/4373797/normal_5f90dcd079e95.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf68.bin
85702f06a5491baef008ba990f13b63dccdc1e96650f19dadcae083a86cee983		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF68 5700 bytes
font_01_sfnt_off0000d2c4.bin
2720211250060450007b8eb470076f72a9f87bcddbfa9bece265cfb9b2f606bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2C4 10660 bytes
font_02_sfnt_off0000f76f.bin
44268b18fde3c140e02abbef57d259e4f2498e34fcb62ff9c54335f996912b7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF76F 16116 bytes

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