Malicious PDF — malware analysis report

Static analysis result for SHA-256 e88493f1bcfaf6e6…

MALICIOUS

PDF

74.8 KB Created: 2021-03-02 13:31:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: fbdfdae17e1475fd3424553eb6dad87b SHA-1: e4887ac287676eba7e4afb1c4a494a1b24d66a01 SHA-256: e88493f1bcfaf6e6b53e8010372bab0237f411ffff631a3e260394e949f387a7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file is classified as malicious by ML and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body, though partially corrupted, mentions 'weight loss chart' and 'wkhtmltopdf', likely a lure to disguise the malicious intent of directing users to external sites.

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://jacksth.ru/strik?utm_term=how+to+create+a+weight+loss+chart+in+numbers PDF link annotation
    • http://leon-stavki.info/gimaxafelagjqqo.pdfIn PDF document text
    • http://kuvitexubo.iblogger.org/lusedizovobevuvoxusunelos.pdfIn PDF document text
    • http://lg-copyrightforms.com/world_camera_live_apkwhtck.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454436/normal_5ff21b1e8203a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371247/normal_6025782db1bd2.pdfIn PDF document text
    • https://mobisikude.weebly.com/uploads/1/3/1/6/131606420/rafuduxagevu-gariva-vedagu.pdfIn PDF document text
    • http://jojujikipafoz.iblogger.org/67869056232.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491969/normal_5fe79972c3b04.pdfIn PDF document text
    • https://tamilazubi.weebly.com/uploads/1/3/4/6/134604156/1f842302670.pdfIn PDF document text
    • http://hidver.com/how_to_install_mtx_subwooferjuu3t.pdfIn PDF document text
    • https://zikotidule.weebly.com/uploads/1/3/4/6/134604350/nosusolebanelik-renax-jimewexiwe.pdfIn PDF document text
    • http://kewujedirolut.22web.org/missing_411_hunters.pdfIn PDF document text
    • https://teraxumafelenug.weebly.com/uploads/1/3/4/7/134747654/rigojisinulow-zufupijijulubog-mofiwarikuv.pdfIn PDF document text
    • https://sukuwakutas.weebly.com/uploads/1/3/4/6/134603616/poxivewo.pdfIn PDF document text
    • http://prodson.fun/essentials_of_veterinary_bacteriology_and_mycologymhpgs.pdfIn PDF document text
    • http://luxshop21.site/classdojo_app_logo5t3jc.pdfIn PDF document text
    • https://sakurulemiba.weebly.com/uploads/1/3/0/9/130969926/2612124.pdfIn PDF document text
    • https://jurujixomegisi.weebly.com/uploads/1/3/4/7/134745805/dokumid_vafadakogiwoj_ziromukud_pakenepete.pdfIn PDF document text
    • http://xbet1.fun/63051118847312pa.pdfIn PDF document text
    • http://vashobereg.com/pofazofazofovinidetepje1wk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE835 5408 bytes
SHA-256: a39a6e92f9c816aaad95d833d2988ad0503fce15eacea839f82e5032d9bac166
font_01_sfnt_off0000fa81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA81 10272 bytes
SHA-256: 10dcfacbf70b6c67ea5ac8dc741f32a853f4255cbdb1bed2f4e15ca8212669a6

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