Malicious PDF — malware analysis report

Static analysis result for SHA-256 460b8af3203a9e56…

MALICIOUS

PDF

79.3 KB Created: 2021-02-27 14:07:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a56c4d5c063cc0c45f776d0a1d1793ca SHA-1: 730f55aca2c46df27fb4c4034b07c73421fda505 SHA-256: 460b8af3203a9e56118383a84ffdfd3650b2c532c4da0a509901275e5e430f30
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 hosting and are part of a link farm, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, contains keywords related to search queries, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xezojetit.ru/wix?keyword=hot+wheels+treasure+hunt+cars+value PDF link annotation
    • https://bizutimuja.weebly.com/uploads/1/3/3/9/133999747/rugaf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462985/normal_5fe0d8fd75877.pdfIn PDF document text
    • http://insitemonitoring.com/karadareripikawobevidamisfb9pp.pdfIn PDF document text
    • https://sewizafisebe.weebly.com/uploads/1/3/1/4/131437566/6113048.pdfIn PDF document text
    • http://copyright-help-center.com/sidufewuzimejulupesafeiy1yr.pdfIn PDF document text
    • http://muzhskoizhurnal.ru/las_siete_claves_del_exito_de_disney7xpgf.pdfIn PDF document text
    • http://mestorating.ru/66171318471k5l1v.pdfIn PDF document text
    • https://tejikapor.weebly.com/uploads/1/3/1/3/131382395/kekevotij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405904/normal_601f3b46cdae4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495854/normal_5feef54f3e815.pdfIn PDF document text
    • http://leziwazedo.mypressonline.com/53606190307.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370529/normal_5ff176d31ac60.pdfIn PDF document text
    • https://nodirerivono.weebly.com/uploads/1/3/6/0/136052085/lurasujusanetuba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444369/normal_5fef8659da76f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lemerisinivum/epigenetica_definicion.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/jozokezaluxejumemebi.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/24850559278.pdfIn PDF document text
    • https://s3.amazonaws.com/roware/afasia_global.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/xokujimakopemositigala.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/dark_souls_2_power_stance_guide.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA02 5000 bytes
SHA-256: 7017ed01dbc1fbed1bc72df0f9638ffa8ec371b576bcbb9383ba8f4b026a4f45
font_01_sfnt_off00010b12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B12 10644 bytes
SHA-256: 34c71f738387266c9efca390ee392792371dd559ca88a488c5a5e8d5eacc76ba

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