Malicious PDF — malware analysis report

Static analysis result for SHA-256 bebc8f97f61f811a…

MALICIOUS

PDF

75.4 KB Created: 2021-04-07 04:16:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: c55ced34f71d8ad1908605cb3127f1b1 SHA-1: bcf09617b08311d13040e8028fda9d0171266cc4 SHA-256: bebc8f97f61f811a650445bc160b87347ec21e5b2f3bf7dc111466cf76cb620d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The file is identified as malicious by ClamAV and an ML classifier, with multiple heuristics indicating it's a link farm on disposable hosting. The embedded URLs point to suspicious domains, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and heuristics strongly suggest it's designed to exploit vulnerabilities or trick users into visiting harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://gimoguvi.ru/award?keyword=hukum+utilitarianisme+pdf PDF link annotation
    • https://cdn.sqhk.co/tokofape/hcMjdrD/drift_fortnite_mask.pdfIn PDF document text
    • http://sportita.fun/asus_rog_crosshair_viii_hero_price_philippinesi5jau.pdfIn PDF document text
    • http://kujinatazema.sportsontheweb.net/novelepetutuxunupovo.pdfIn PDF document text
    • https://cdn.sqhk.co/xunijejozi/sge0giE/borarokulabubidunogudab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447436/normal_605430e336492.pdfIn PDF document text
    • http://idealicaitaly-ufficiale.site/skillful_reading_and_writing_1_teachers_book79x86.pdfIn PDF document text
    • http://momentikshop.space/the_easy_way_to_stop_drinking_allen_carr_freea0a29.pdfIn PDF document text
    • http://lesantyqas.online/best_friends_forever_game_review816ze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420907/normal_6049d4449b81c.pdfIn PDF document text
    • https://cdn.sqhk.co/zajikeze/VWDjibC/87610514833.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379601/normal_602655a5a9988.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366311/normal_603194612f88f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416923/normal_603cb774b902e.pdfIn PDF document text
    • http://toreret.scienceontheweb.net/34195593441.pdfIn PDF document text
    • http://newberginvestmentproperty.com/6858705661vqwoy.pdfIn PDF document text
    • https://cdn.sqhk.co/jigitovewuk/jcjcVuI/apple_mac_hidden_files.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bad3f395-1638-4667-b349-d6f934eeab49.filesusr.com/ugd/ed2d23_ced189e8c07b46a981c1d3acb87e81bb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a56e314-f29e-45aa-9f8d-20810e2c6113/11326311563.pdfIn PDF document text
    • https://80f75f89-a1e3-4611-a0ef-7a704eb82da9.filesusr.com/ugd/0286dd_f6f690ca00224238bbf95ab1950405e7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/749933cc-a736-44de-96b1-c572cd492567/43980427800.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c9079ed-0c49-4815-b6c5-126916380306/what_mental_illness_does_the_man_in_split_have.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b490092-ffec-45c3-9165-374c83b726a2/dowakadedidi.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_off0000ea55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA55 5212 bytes
SHA-256: 885a625238d2c30007bddb7392d08f088814f93804c674cd517e24e39ebc1a64
font_01_sfnt_off0000fbf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF7 10560 bytes
SHA-256: 72fc9a2071a65139668b02bb313afcce4eb7405034fd4b4a748104dc9af7e8bd

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