Malicious PDF — malware analysis report

Static analysis result for SHA-256 2446d244fe526491…

MALICIOUS

PDF

67.6 KB Created: 2021-03-18 00:02:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12ce3dd3d845bf240af7da7bb5c10b8f SHA-1: 39503565e952ba6d942f054beda9df766f8f1d2d SHA-256: 2446d244fe5264910d3816006bd53eaf36bda9871a8a2f1884691e889217d568
124 Risk Score

Malware Insights

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

The file is a PDF containing numerous embedded URLs, many of which point to disposable domains and are used in a link farm configuration. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8239

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://resalured.ru/aws?utm_term=can+you+play+betrayal+at+house+on+the+hill+with+2+players
    • https://cdn.sqhk.co/pulisamog/MP5h9ja/dewitujobiroxape.pdf
    • https://cdn-cms.f-static.net/uploads/4387815/normal_60467817d123a.pdf
    • https://cdn-cms.f-static.net/uploads/4484834/normal_6041c5ef1284f.pdf
    • http://dajewerudo.22web.org/programmable_logic_controller_tutorialspoint.pdf
    • https://static.s123-cdn-static.com/uploads/4458124/normal_5fe3f00adc424.pdf
    • http://tegogigagozij.iblogger.org/new_company_name_list.pdf
    • https://static.s123-cdn-static.com/uploads/4416304/normal_5ffba1a751085.pdf
    • https://cdn.sqhk.co/zimidenex/eifsEuV/bcg_bradshaw_consulting_group_llc.pdf
    • https://cdn-cms.f-static.net/uploads/4503033/normal_5fd7d26479aa0.pdf
    • http://noxiliko.iblogger.org/kufujojilibasonolinoweri.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://b1b0174c-961c-4936-87f6-765e1132391e.filesusr.com/ugd/6cf804_271a6d9dcd624f1b8bd496e6e828dcfa.pdf?index=true
    • https://ac65beef-1c88-4b01-a948-251493ed82f2.filesusr.com/ugd/09857b_f6422ecdcacf40be848e60f97915f494.pdf?index=true
    • https://8fc1c2d6-49ba-4d63-8b95-0327ef2b1627.filesusr.com/ugd/1849a1_24b4720df3a64300bb9346c65374e2be.pdf?index=true
    • http://rubidolad.epizy.com/how_to_use_gift_card_on_twitch.pdf
    • http://guxajez.rf.gd/jilewazozedimofer.pdf
    • http://rupeguv.epizy.com/bootstrap_examples_templates_free.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0e6.bin
09f8ef6213d5ba55ca95ef0fed1b08900ad1aeac9b147f2ddce235c26aaa3df7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E6 5276 bytes

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