Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0f60c80babbca3f…

MALICIOUS

PDF

80.3 KB Created: 2021-02-19 03:44:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 679a43cf0c050a27254f8cf76d4e7602 SHA-1: 080ef1990b18a23860ee86f8e7b5e049efa51bf3 SHA-256: f0f60c80babbca3fdc686135d03e2a1da0785b221aced74ef9d18a8bab5baf64
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to disposable domains, indicating a link farm designed for SEO manipulation or phishing. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URLs and the heuristic firings indicate that this PDF is part of a phishing campaign, likely attempting to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://jacksth.ru/strik?utm_term=matlab+for+electrical+engineers+book+pdf PDF link annotation
    • http://ponoxavar.iblogger.org/xavogivotumumaworofekim.pdfIn PDF document text
    • https://sabigojepesadiz.weebly.com/uploads/1/3/2/8/132814096/vafemujejefip.pdfIn PDF document text
    • https://xetudutadoboja.weebly.com/uploads/1/3/4/3/134344850/jafavofexeni.pdfIn PDF document text
    • http://fesebenawasoz.iblogger.org/98049733196.pdfIn PDF document text
    • https://cdn.sqhk.co/mizopopowaze/hehaagf/fiziradivekiranuvunalovox.pdfIn PDF document text
    • https://genunilime.weebly.com/uploads/1/3/4/3/134344847/5200365.pdfIn PDF document text
    • https://berisojelo.weebly.com/uploads/1/3/0/8/130874511/6785123.pdfIn PDF document text
    • http://xasujaru.22web.org/dance_monkey_lyrics.pdfIn PDF document text
    • https://powelogub.weebly.com/uploads/1/3/1/8/131871449/3626544.pdfIn PDF document text
    • https://betataniboluwi.weebly.com/uploads/1/3/0/9/130969090/nexokiropig.pdfIn PDF document text
    • https://siziloxa.weebly.com/uploads/1/3/4/7/134747516/dunolanowenixezi.pdfIn PDF document text
    • https://rasozonikazip.weebly.com/uploads/1/3/4/9/134904665/jabogidij-redosut-mupem.pdfIn PDF document text
    • https://cdn.sqhk.co/paleguvebo/cjfhWij/ninja_bullet_green_smoothie_recipe.pdfIn PDF document text
    • https://pizupunaj.weebly.com/uploads/1/3/1/4/131406403/2611771.pdfIn PDF document text
    • https://bijawodit.weebly.com/uploads/1/3/4/8/134883407/sozuwete_weseso_gepaxozini.pdfIn PDF document text
    • https://pulezigo.weebly.com/uploads/1/3/4/6/134600697/2824277.pdfIn PDF document text
    • http://bavewemelemare.iblogger.org/addictive_thinking_twerski.pdfIn PDF document text
    • http://vavesojijakoju.iblogger.org/china_embassy_authentication_application_form.pdfIn PDF document text
    • http://tivaxamikesu.iblogger.org/abdullah_calan_kitaplar_indir.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f9b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B5 5532 bytes
SHA-256: 7eaa76890b3e6778853b61933cd0bf2a2dc0157237c0622cd0e4b71fa62c3095
font_01_sfnt_off00010c9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C9E 11684 bytes
SHA-256: 052fe51486fa4375f75e0a9e392bf822545a6c4bd2ecb296b7bce7c60e8bedaa

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