Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0e1bb84c5ba42cd…

MALICIOUS

PDF

72.2 KB Created: 2021-03-24 03:43:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3bf08b536ee9bfa0b7528b28302b950 SHA-1: 649c1b5f441dfdbac0202ae91d308335b7086758 SHA-256: e0e1bb84c5ba42cd409c979658933d83c2830a79fde6341c60f11104f44e719b
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8413

Heuristics 4

  • 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
  • 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://kuzutuzo.ru/award?keyword=hidden+technical+debt+in+machine+learning+systems+pdf
    • https://static.s123-cdn-static.com/uploads/4381962/normal_5ff4349b41feb.pdf
    • http://freud.icu/takaseza20aq8.pdf
    • http://confirmyourverifiedbadge.com/taroksqazp.pdf
    • https://gedikorewugeg.weebly.com/uploads/1/3/0/7/130775309/2643586.pdf
    • https://cdn-cms.f-static.net/uploads/4450625/normal_601f21f4e4ad0.pdf
    • https://wenutezow.weebly.com/uploads/1/3/5/4/135400756/759323.pdf
    • http://vuzuwul.getenjoyment.net/88840963970.pdf
    • http://reduslim-officialsite.site/95798067701lbww4.pdf
    • http://lefibipefazefep.mypressonline.com/what_to_do_if_you_have_bad_handwriting.pdf
    • https://tigobatimomovo.weebly.com/uploads/1/3/2/7/132740361/gumiwo-morugototubib-zopurewi-lowomezu.pdf
    • https://cdn-cms.f-static.net/uploads/4380867/normal_60421c0156141.pdf
    • https://babinekisifuve.weebly.com/uploads/1/3/2/6/132696104/rizewamom.pdf
    • https://cdn-cms.f-static.net/uploads/4375886/normal_60112c9ac71b4.pdf
    • https://memuwumobodedo.weebly.com/uploads/1/3/5/9/135974490/1289814.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e507d52c-e76f-414b-a2c5-5ec0193bee2e/navy_correspondence_letter_format.pdf
    • https://uploads.strikinglycdn.com/files/de86fd99-f11c-4660-b035-c522737ee5ff/fixivoxifatugonofux.pdf
    • https://uploads.strikinglycdn.com/files/ec9e534b-1e2c-4ef3-af65-2fdd071b4fa3/xomumo.pdf
    • https://uploads.strikinglycdn.com/files/d1a007c7-8be5-4062-bb77-0fa262f22077/introduction_to_linear_algebra_gilbert_strang_online.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb17.bin
870e04a51830b8b08e92f73d0b69f57f2e0e925755e8b76b232156e3bc0b711d
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB17 5772 bytes
font_01_sfnt_off0000fe95.bin
47a3b849ff02f8aa433cf879ef92a7d210d316aea3b29a0e2c2a8853fa9f8e40
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE95 10852 bytes