Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdc6d3904e796c97…

MALICIOUS

PDF

76.5 KB Created: 2021-03-17 13:42:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 7d68f11b3cae032b2e6e1387023f781c SHA-1: fb500df96acbb0b0344f788ffdd1e44cadf8f1e0 SHA-256: cdc6d3904e796c973b6f3161a326fb1a02825fede26afbb74d451839b076b387
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, indicative of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were extracted, the PDF structure and URL patterns are consistent with attempts to exploit users via deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/wix?keyword=cou+apple+store+at+the+falls PDF link annotation
    • http://patamekuzon.iblogger.org/hoover_windtunnel_central_vac_parts.pdfIn PDF document text
    • https://cdn.sqhk.co/kewawukufiju/5FE3gii/jejuzebafezujuzafip.pdfIn PDF document text
    • http://vanimerukaguto.scienceontheweb.net/20156336311.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366339/normal_5fdcc0bd88383.pdfIn PDF document text
    • http://tezuveripoxub.mypressonline.com/nulufuze.pdfIn PDF document text
    • http://fomilexavekol.22web.org/lebunisab.pdfIn PDF document text
    • https://cdn.sqhk.co/mizopopowaze/m6WhaDI/44504683213.pdfIn PDF document text
    • http://merokomazojewi.scienceontheweb.net/tuwime.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365594/normal_601b663268daa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421778/normal_5fcdc2f150ffa.pdfIn PDF document text
    • http://mejuzuw.scienceontheweb.net/niwaguvaretodosuzeduben.pdfIn PDF document text
    • https://cdn.sqhk.co/norowitidot/ZrQZhhh/pixel_fury_3d_multiplayer_download_pc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420766/normal_5fe114d56b4fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476421/normal_602d082f871be.pdfIn PDF document text
    • https://cdn.sqhk.co/lizasizova/iipjibY/komexilojizugewigedeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462352/normal_6012131dad50a.pdfIn PDF document text
    • http://sunazeremitiwu.mypressonline.com/converter_de_a_jpg_online_gratis.pdfIn PDF document text
    • http://maxirem.mygamesonline.org/english_connected_speech_rules.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389095/normal_5fd5f1adf06e9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zasuzutan.rf.gd/business_administration_apprenticeship_level_2_answers.pdfIn PDF document text
    • http://wedusumefixikeg.rf.gd/myers_briggs_personality_test_type_descriptions.pdfIn PDF document text
    • http://wolevovugubim.epizy.com/hp_p4000_centralized_management_console_9._5.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_off0000ee05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE05 4896 bytes
SHA-256: 9e5235fbf7d6d75e3f8d284972581deb1e70f158619ee2da1b9842b54c467d70
font_01_sfnt_off0000fea0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA0 11244 bytes
SHA-256: 4d2b716c8d5c5e2e72c9f3f87ff05263508b0244e683342d3f96dc26a568bfc3

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