Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbeaba50da6398d7…

MALICIOUS

PDF

79.3 KB Created: 2021-03-03 05:12:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 1f2b2f001c8f246d8fe32f265e31c3f4 SHA-1: fee7547a5f43b1fe40e3d9989a2fb79413131a77 SHA-256: fbeaba50da6398d79678a74dd01b1992c1e3043a83b21c0156ad34b02ff763be
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious phishing content. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a link farm strategy, suggesting the primary goal is to redirect users to malicious sites. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/award?keyword=trials+of+apollo+book+2+free PDF link annotation
    • http://gofidiva.iblogger.org/rurevixa.pdfIn PDF document text
    • https://cdn.sqhk.co/zolilobup/gloiaic/69308393663.pdfIn PDF document text
    • https://furiraduwonejos.weebly.com/uploads/1/3/4/8/134870793/sefabegetap-pifetakaw-karoxosub.pdfIn PDF document text
    • https://zunitilamurako.weebly.com/uploads/1/3/4/5/134529552/1312966.pdfIn PDF document text
    • http://jedilinosur.mywebcommunity.org/lesetepuzefopot.pdfIn PDF document text
    • http://rifuxulalezi.iblogger.org/71214132189.pdfIn PDF document text
    • https://zewabezasakaru.weebly.com/uploads/1/3/4/5/134593707/zemagulivivojuvov.pdfIn PDF document text
    • http://dizititakozazi.mywebcommunity.org/practical_machine_learning_tools_and_techniques.pdfIn PDF document text
    • http://joxopenizimili.iblogger.org/android_studio_vector_asset_size.pdfIn PDF document text
    • https://cdn.sqhk.co/savunowudob/ihcqbPk/8173959356.pdfIn PDF document text
    • http://vugijow.iblogger.org/subepomilopovufinagas.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://lebofimuvi.rf.gd/tejuxepo.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/entourage_movie_free.pdfIn PDF document text
    • http://xovipofeguz.epizy.com/93890252766.pdfIn PDF document text
    • http://tiwatimab.atwebpages.com/pajemenaf.pdfIn PDF document text
    • http://surafupomef.epizy.com/la_crosse_bc-700_technoline.pdfIn PDF document text
    • https://s3.amazonaws.com/nasitevu/osteoporosis_treatment_nice_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/folujewexawuruxikure.pdfIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/14276918447.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/blanche_neige_et_les_sept_nains.pdfIn PDF document text
    • http://bepinutarefe.rf.gd/suxudeditanaxadugowome.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_off0000eeb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB5 4780 bytes
SHA-256: 132801010faec5fb996d4e72972ce28305aecdd7497be156fdf8d41936e24459
font_01_sfnt_off0000fefa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEFA 10240 bytes
SHA-256: c256179a5c0a26f333ce4a39b542226739b9bcef05117070e44130f1af71ed55
font_02_sfnt_off00012201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12201 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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