Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e2e9dd9c8249c75…

MALICIOUS

PDF

69.3 KB Created: 2021-02-19 22:39:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 730dea8d207db61a8e7bac13c92546d2 SHA-1: ade3cfeace90ed94d582e9aeeed848b158ae7aae SHA-256: 3e2e9dd9c8249c752676c789f6293d5df9f83387f1c0959be3a78ae5235a6d6e
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many pointing to disposable hosting services, and is flagged by heuristics as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or spam distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites, potentially as part of a spearphishing campaign.

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://bologen.ru/123?utm_term=the+expanse+season+4+dvd+australia PDF link annotation
    • https://bixoriwapavam.weebly.com/uploads/1/3/4/7/134731951/jadusel.pdfIn PDF document text
    • https://gorasugaki.weebly.com/uploads/1/3/4/7/134766712/winulajigivu-tafijo-fedoxaluvu-lidope.pdfIn PDF document text
    • https://damatabawapu.weebly.com/uploads/1/3/1/3/131379320/zoxitu.pdfIn PDF document text
    • https://mizevazorabij.weebly.com/uploads/1/3/5/3/135347525/8b62943f90f39.pdfIn PDF document text
    • http://legujepug.22web.org/jetoxaperozoxikubazanase.pdfIn PDF document text
    • http://pokupka.space/5910794305c5b68.pdfIn PDF document text
    • http://grigolia-studio.ru/335232007319whwx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://wokepotaku.epizy.com/66662815900.pdfIn PDF document text
    • https://s3.amazonaws.com/potamotaz/72424737856.pdfIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/getagopokosuloraxapajo.pdfIn PDF document text
    • http://riruvilanofaz.rf.gd/kekiv.pdfIn PDF document text
    • http://zovitox.epizy.com/gta_sa_android_gamer.pdfIn PDF document text
    • http://rolaxaja.rf.gd/62878382100.pdfIn PDF document text
    • http://viwekamopib.rf.gd/crusader_invoker_set_dungeon_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dakebesuvum/vegupirakuvaxudeziw.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC381 5092 bytes
SHA-256: 7724b6505068c1db0153eb80af8bf0c22ceeb51cbf5f1a5fca29de0797b5f22c
font_01_sfnt_off0000d4ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4CA 10948 bytes
SHA-256: 1205aa3e066890b3327c39610ec5451f8a008a69354a3bdbbd3b7f098f91c9ad
font_02_sfnt_off0000fa43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA43 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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