Malicious PDF — malware analysis report

Static analysis result for SHA-256 d68a159dc13a1965…

MALICIOUS

PDF

76.3 KB Created: 2021-04-03 18:52:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 90f1eb8c85aee2b5251bcc9604525d6c SHA-1: b06b9570097e466b3992d5f71229843e60694cbf SHA-256: d68a159dc13a1965a20691d63bbe2f04508d21154b8b8f1779dd2561b79da54d
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting services, suggesting a link farm or phishing lure. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates the PDF is designed to host many links on disposable domains, likely to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/award?keyword=acupuncture+points+for+knee+pain+pdf PDF link annotation
    • https://lumovomudin.weebly.com/uploads/1/3/4/7/134704265/3d3383e6a0a82.pdfIn PDF document text
    • http://melomone.scienceontheweb.net/definition_of_accounting_principles.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464525/normal_600bf21ee900f.pdfIn PDF document text
    • https://radugimexeb.weebly.com/uploads/1/3/4/8/134880062/5555569.pdfIn PDF document text
    • https://manabuvajej.weebly.com/uploads/1/3/4/8/134847277/vufaliduxaxapi.pdfIn PDF document text
    • http://fosegede.22web.org/vimedunakone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482399/normal_6014ee4124410.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489852/normal_603711686bdc4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479470/normal_600ce84c98e65.pdfIn PDF document text
    • http://tatanip.medianewsonline.com/alpinismo_definicion.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376601/normal_600cefc50cf2d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410702/normal_5feb15f07ad5e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446511/normal_5fe4e1ea18750.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404121/normal_600c49ef24fcb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473637/normal_6004a8cc608f5.pdfIn PDF document text
    • https://wikumegi.weebly.com/uploads/1/3/1/4/131407968/kenopafaza.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366032/normal_5ff86923312bd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jinonepi.epizy.com/how_to_crochet_a_bucket_hat.pdfIn PDF document text
    • http://woduzubede.epizy.com/sudawasosenudebitezeduge.pdfIn PDF document text
    • http://gofosuxubajo.epizy.com/16444999068.pdfIn PDF document text
    • http://jorasixu.myartsonline.com/bhagavad_gita_meaning_in_tamil.pdfIn PDF document text
    • http://gidigeja.rf.gd/kamutiwazafejibasati.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57991f1b-10d7-4e7a-956a-d11213224611/matplotlib_scatter_size_of_dots.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db08e264-726c-4ef8-a456-90b1dbd5c933/hp_laserjet_pro_400_color_m451dn_problem_installing_driver.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_off0000eda0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA0 5172 bytes
SHA-256: cf07befe1e922d5001906d2d03b0ed52c159c40e85768dff9cf192436b833d8b
font_01_sfnt_off0000ff54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF54 10740 bytes
SHA-256: c810af2aa9c1a9ae7e79586e2d837c787670773730c448b3c791404693ce06cd

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