Malicious PDF — malware analysis report

Static analysis result for SHA-256 62903a2b28203b60…

MALICIOUS

PDF

85.6 KB Created: 2021-05-15 10:14:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: a2fe111b4eac2cd7802b8d7d95ed30af SHA-1: 21e587ba3174eeb718f6e4bf42e31566344f323a SHA-256: 62903a2b28203b6007b3d328365830065b79324b44c425b1144781eb399e6f7c
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics indicate it functions as a link farm, hosting numerous external URIs on disposable domains, a common tactic for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://golowaki.ru/strik?utm_term=line+6+spider+valve+mkii+hd100+problems PDF link annotation
    • https://gutoxokotuvil.weebly.com/uploads/1/3/1/3/131380594/vexuzonow.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447915/normal_5feb02c27adcd.pdfIn PDF document text
    • http://zitekimuzefovar.iblogger.org/nikko_japan_guide_winter.pdfIn PDF document text
    • http://miketofomasofi.22web.org/dezofutuzi.pdfIn PDF document text
    • http://nashremont.site/can_you_renew_your_cdl_license_at_aaauo1z4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502439/normal_604ad07eb0f9d.pdfIn PDF document text
    • https://wubajepetodol.weebly.com/uploads/1/3/1/6/131606368/6192871.pdfIn PDF document text
    • http://llloooodddd.space/fozibakibavufuzanunalphr94.pdfIn PDF document text
    • https://cdn.sqhk.co/kososojog/hgjhgOk/gisepunaxivubojo.pdfIn PDF document text
    • https://jamudavepavu.weebly.com/uploads/1/3/5/3/135324372/8235045.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473654/normal_60623e1146046.pdfIn PDF document text
    • http://xudogiborijum.66ghz.com/37285375813.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393035/normal_5fc8a0b76029b.pdfIn PDF document text
    • http://vzruvayarttraff.xyz/zukapuzlutg1.pdfIn PDF document text
    • https://vokudaminovisuz.weebly.com/uploads/1/3/4/4/134495340/vuzipikosu.pdfIn PDF document text
    • https://cdn.sqhk.co/nexupumile/JUyNiif/liwegubawif.pdfIn PDF document text
    • https://kasitawudak.weebly.com/uploads/1/3/1/3/131380619/xadebevo.pdfIn PDF document text
    • http://hookup153.fun/bosch_dishwasher_shx3ar75uc_partsn4wdj.pdfIn PDF document text
    • https://sitegevom.weebly.com/uploads/1/3/4/6/134664280/fewazebon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470542/normal_60586fdd39d1d.pdfIn PDF document text
    • https://kenibojowosude.weebly.com/uploads/1/3/5/3/135324683/nowububunebaruvodi.pdfIn PDF document text
    • http://albl.ru/4793142875318lgt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fabodatutowew.epizy.com/vlookup_in_excel_2013_between_2_sheets.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_off00011017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11017 5752 bytes
SHA-256: 1e2d41d370f7ed1820096f7ac43f76c44b0d558ab71fdf7e8f3f8f1f3f24c6b7
font_01_sfnt_off0001237d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1237D 11004 bytes
SHA-256: 86b20133f069e04f4214e40c41b6eb8d2c9313f5ccc6d28dfa1dfe0caa6d2c9d

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