Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a80fe7e8a9b5e78…

MALICIOUS

PDF

73.6 KB Created: 2021-02-22 19:48:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 46b04301471ecf43d925a026698f0a48 SHA-1: 3fd289d0f35f1d60ddf8ef58c009ee0d7392b16d SHA-256: 6a80fe7e8a9b5e78f020c0b8613447e89069e327a6ae6101a71529f8423c3f23
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting it's designed to redirect users to potentially harmful sites. The presence of embedded URLs and the PDF structure itself point towards a phishing or malware distribution vector.

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://leonvi.ru/strik?utm_term=primo+water+cooler+parts+diagram PDF link annotation
    • https://cdn.sqhk.co/dodanadofu/1xggTG2/fuwileruvugoxiwimu.pdfIn PDF document text
    • https://cdn.sqhk.co/piwojosexaja/jhnAhfi/pop_music_in_spanish_translation.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413244/normal_602bf174782cf.pdfIn PDF document text
    • https://cdn.sqhk.co/ledodatefu/HhfjfXL/sniper_games_online_miniclip.pdfIn PDF document text
    • http://tiwirodizefa.iblogger.org/sajitusefogape.pdfIn PDF document text
    • http://savadaqwe.space/95354356515fukde.pdfIn PDF document text
    • https://cdn.sqhk.co/zikegasenar/jiiiihv/ding_ding_gori_kavita_dakhva.pdfIn PDF document text
    • http://mazonenebu.22web.org/regagirido.pdfIn PDF document text
    • http://dom-bita.org/28356928352armuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427793/normal_602c4769a4250.pdfIn PDF document text
    • http://nevodoma.iblogger.org/beeswax_sheets_for_candle_making_australia.pdfIn PDF document text
    • https://cdn.sqhk.co/lumolixuwo/qoidaia/digudorebuwatiwef.pdfIn PDF document text
    • http://businesslinecenter.com/moxuvuwazofelogalotags48h.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/nefomojuwet/referee_report_economics_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/hydraulic_acid_sheet_mask.pdfIn PDF document text
    • http://nosijatigatu.epizy.com/xedezurexexixesuxexosip.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/kavaganivopabazatopulum.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/sujiz.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE149 5488 bytes
SHA-256: ec0480cd497b924e4b09904431f84b401462304e1cedf67f99251f59fad3dd6e
font_01_sfnt_off0000f3ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EC 10876 bytes
SHA-256: 1672fbe5ca02ff348d9db485b868355a927d32f8888d83691acb720c942f96c8

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