Malicious PDF — malware analysis report

Static analysis result for SHA-256 193a79790dd281a3…

MALICIOUS

PDF

70.9 KB Created: 2021-03-21 11:21:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f2fc134cc8d20d6df3c1e16f7e6841d SHA-1: 701b60ef74b70ae9174d56ac1acc7bdaf8841368 SHA-256: 193a79790dd281a306f23aab5231fa9df6a3fd33b9d92099c3946fee4ea2dc2c
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a large number of external links, indicating a link farm strategy, with one prominent URL being https://ponafet.ru/wix?keyword=iron+horse+elementary+website. The PDF structure and embedded content suggest it is designed to redirect users to potentially malicious websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/wix?keyword=iron+horse+elementary+website
    • https://tesewipelevifiv.weebly.com/uploads/1/3/3/9/133997178/7523c0d9.pdf
    • https://cdn.sqhk.co/rekutadis/fhaBYhf/murderous_pursuits_characters.pdf
    • https://cdn-cms.f-static.net/uploads/4450038/normal_601b73cd5a126.pdf
    • https://roralolew.weebly.com/uploads/1/3/0/7/130775143/12f622e3d.pdf
    • https://cdn.sqhk.co/guzowozuk/geJicja/ragibedexuwekadakodewugo.pdf
    • https://sinaxerepedosuj.weebly.com/uploads/1/3/1/3/131398545/6930268.pdf
    • https://cdn-cms.f-static.net/uploads/4408707/normal_6017a7e90caa0.pdf
    • https://static.s123-cdn-static.com/uploads/4445128/normal_600262d94a000.pdf
    • https://cdn-cms.f-static.net/uploads/4470841/normal_60184e92ede00.pdf
    • https://cdn.sqhk.co/sifapudoxig/CGjdijI/89585911219.pdf
    • https://cdn-cms.f-static.net/uploads/4459805/normal_6054d9af30501.pdf
    • https://natitapa.weebly.com/uploads/1/3/1/3/131379406/livanorumasud.pdf
    • https://cdn-cms.f-static.net/uploads/4388293/normal_600b3fe6264e7.pdf
    • https://cdn-cms.f-static.net/uploads/4367911/normal_60176bf7631d6.pdf
    • https://static.s123-cdn-static.com/uploads/4417313/normal_5ffea0d41dd50.pdf
    • https://cdn-cms.f-static.net/uploads/4422145/normal_604069a49f444.pdf
    • https://pilopagitek.weebly.com/uploads/1/3/4/8/134856928/c644146fc5.pdf
    • https://belanuxaru.weebly.com/uploads/1/3/4/6/134670531/pafamozazuxogesif.pdf
    • https://fejilezujew.weebly.com/uploads/1/3/4/3/134340931/dafudovinedatisefovu.pdf
    • https://bipasakugerada.weebly.com/uploads/1/3/4/3/134350286/4989947.pdf
    • https://static.s123-cdn-static.com/uploads/4450148/normal_5fe0b534be57b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/mogedozara/lifibo.pdf
    • https://s3.amazonaws.com/fopalew/zejekidibupupanafazimodu.pdf
    • https://s3.amazonaws.com/zuxime/bmw_navigator_6_update_mac.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_off0000d60a.bin
e20089871bad576374c07c838256062da798dcc2a5d5bde6fa84d4b380303bf8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD60A 5196 bytes
font_01_sfnt_off0000e79b.bin
d6086139a01bb270310fc8d9fcbc2af2d9174d638dfd70edb71d7e29ecd865f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE79B 10928 bytes

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