Malicious PDF — malware analysis report

Static analysis result for SHA-256 c46f77b2a259ac29…

MALICIOUS

PDF

71.5 KB Created: 2021-03-01 11:46:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 4cc041de5abad22a273d4e1ac4ebc93c SHA-1: d6b8c674f25e6ac5cdeff4b6189af48d74336476 SHA-256: c46f77b2a259ac29183c4832f9b73ad7b2781ed7e85e2c70c1d809ca36bc3d2f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are characteristic of phishing lures designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/123?utm_term=ge+microwave+oven+repair+service PDF link annotation
    • http://teaapple.space/supamigedenedixerrevte.pdfIn PDF document text
    • https://cdn.sqhk.co/getabemuto/eiiB8pc/cowboy_costume_toddler.pdfIn PDF document text
    • https://cdn.sqhk.co/dabozijide/XhhjiCv/jekeb.pdfIn PDF document text
    • http://maska-respirator.com/tedoxevikirunerotaskxsb.pdfIn PDF document text
    • http://esclick.pro/jamirufusegatudopijuwes7b3q3.pdfIn PDF document text
    • https://tobejisexin.weebly.com/uploads/1/3/1/4/131454505/1191107.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407331/normal_5fdc44f5a4eaa.pdfIn PDF document text
    • http://3bki.ru/balboa_short_story_by_sabina_murrayh5ht3.pdfIn PDF document text
    • https://cdn.sqhk.co/lupobikud/8zOjfie/kuxizekerapatipide.pdfIn PDF document text
    • http://card2card.live/xemirabuft3ek.pdfIn PDF document text
    • https://mobisikude.weebly.com/uploads/1/3/1/6/131606420/tekipaxu.pdfIn PDF document text
    • http://keysecret.ru/vemokunbnhz0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468255/normal_5fdb193776e44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447095/normal_601fff3e57cf7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496616/normal_5fe99444546a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404297/normal_5fdb71ceb98e4.pdfIn PDF document text
    • https://linezeludamaxen.weebly.com/uploads/1/3/4/3/134340908/gaxarajomagi-kuwowesi-wiruku-raguwu.pdfIn PDF document text
    • http://gayerkan.com/28126367072qelny.pdfIn PDF document text
    • https://gideturifit.weebly.com/uploads/1/3/4/8/134887905/jiwew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426543/normal_6016578d1bac3.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_off0000d7d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D1 5232 bytes
SHA-256: 90b2061debf3d0f1b9fef0907971ae3e9360d0e6719f09f19a182b2d41da63e7
font_01_sfnt_off0000e9a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A1 11208 bytes
SHA-256: ffa7849196481f28e4a9699a3bf59ac3687498e031a34c2e6e2f7bc0385a01d9

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