Malicious PDF — malware analysis report

Static analysis result for SHA-256 32a7f03d567370af…

MALICIOUS

PDF

90.3 KB Created: 2021-04-08 21:17:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: b3473b2191ddcccee409824582587d34 SHA-1: 26c246834a8d835495aef457e362bebd90ae8dc3 SHA-256: 32a7f03d567370afdad0a22ac8b8df52c45a26b940553e2a6c285ed6d57ef6b3
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The heuristic analysis indicates it functions as a link farm, embedding numerous URLs, with at least one pointing to a suspicious domain ('midufefew.ru'). While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://midufefew.ru/strik?utm_term=what+is+beneatha%2527s+dream+in+a+raisin+in+the+sun PDF link annotation
    • https://gopogusefivow.weebly.com/uploads/1/3/1/4/131406686/radifowubuxuferumave.pdfIn PDF document text
    • https://cdn.sqhk.co/womawuxinuge/igjb8ih/call_of_duty_black_ops_3_zombies_online.pdfIn PDF document text
    • http://tryadasert.online/kotododalelirigujuredaposnrfe5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379049/normal_6041d0321a45b.pdfIn PDF document text
    • https://vulefinan.weebly.com/uploads/1/3/2/6/132695887/157221.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465397/normal_601f8fbc2e47a.pdfIn PDF document text
    • https://gozuneputir.weebly.com/uploads/1/3/4/3/134345179/2739206.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415974/normal_5ffde13ee4565.pdfIn PDF document text
    • https://tuledekubixa.weebly.com/uploads/1/3/4/7/134722649/lusada-porajekak.pdfIn PDF document text
    • https://cdn.sqhk.co/zanemulazif/bjgiiHE/empire_total_war_politics_guide_united_provinces.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459624/normal_5ff1939d65b9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446272/normal_6056fffa9606e.pdfIn PDF document text
    • https://cdn.sqhk.co/xumirikebixo/gfFfgjQ/bunny_pancake_kitty_milkshake_scene.pdfIn PDF document text
    • http://vivudanu.scienceontheweb.net/technology_adoption_definition.pdfIn PDF document text
    • http://lnstagramsupportingcenter.com/zorubamabotuzedokareruxxjcmp.pdfIn PDF document text
    • https://jamudavepavu.weebly.com/uploads/1/3/5/3/135324372/0064d93.pdfIn PDF document text
    • http://bufibinokurun.scienceontheweb.net/antipatterns_book.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415519/normal_5fcc509c332b6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gubawakelu.onlinewebshop.net/64642638502.pdfIn PDF document text
    • http://tibamupebunod.atwebpages.com/91245599241.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_off00012540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12540 5220 bytes
SHA-256: 059c8e6e5ce6f83661dda8b30499057965248899a351b3da75f081aa27ec1626
font_01_sfnt_off000136e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136E3 10712 bytes
SHA-256: 9e2185e3ff001e3e1e3beb3acad74404197e1e0ebf1b9a051ef2b33e167368c7

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