Malicious PDF — malware analysis report

Static analysis result for SHA-256 0430cf306a85f23e…

MALICIOUS

PDF

76.2 KB Created: 2021-02-21 23:09:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 98131015dd5a2cfec82741228186ee6d SHA-1: b94223c5a7878d6e47de5814106a4bb4bafe78b2 SHA-256: 0430cf306a85f23ec2767590adb9b42727cbef6e637aed662b8b422bc96c4a58
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with a high heuristic score indicating it functions as a link farm on disposable hosting. One prominent URL, 'https://seumenha.ru/wix?keyword=ariana+grande+personality+quiz+buzzfeed', suggests a social engineering lure related to a popular quiz. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://seumenha.ru/wix?keyword=ariana+grande+personality+quiz+buzzfeed PDF link annotation
    • http://setlyb.online/fender_american_acoustasonic_telecaster_manualjrngv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424347/normal_5ff20fed143ab.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzefegevo/jiLiKgj/mod_godzilla_minecraft.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366034/normal_5fd256e536460.pdfIn PDF document text
    • https://cdn.sqhk.co/buvaboda/icHv8np/29481377599.pdfIn PDF document text
    • http://ketotreno.buzz/lotiralm4bb8.pdfIn PDF document text
    • https://cdn.sqhk.co/jawutuwek/fjd0Aha/71055964833.pdfIn PDF document text
    • http://lunowizu.iblogger.org/gakugagolugigadumugodor.pdfIn PDF document text
    • http://antonio-ita.space/bovegogimolawodeto11z7o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426410/normal_6020fa865bb21.pdfIn PDF document text
    • https://cdn.sqhk.co/berirenike/0UW4heW/45293363168.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403683/normal_5fe661c755329.pdfIn PDF document text
    • http://biduwupukipajov.22web.org/vande_mataram_kannada_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/savageven/od05Zgg/61805170778.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/beechcraft_duke_60_maintenance_manual.pdfIn PDF document text
    • http://biborufa.epizy.com/dolphin_emulator_games_mac.pdfIn PDF document text
    • http://fiwusinuba.rf.gd/chest_parenteral_anticoagulation_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/36592103255.pdfIn PDF document text
    • http://taduzaxafoguj.rf.gd/zerosokujubukizesuwi.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/vscode_python_formatting_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/auto_chess_pc_alpha_test.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e03f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE03F 5616 bytes
SHA-256: 3f5832cd19b934cb9e0d12a0852bbf55e12b2fa43e0c5880c995b5a69c8a4456
font_01_sfnt_off0000f366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF366 2584 bytes
SHA-256: 2039b6855c38c289a57b962b6c28d221cc164af1e2da268e63cf9beb21505307
font_02_sfnt_off0000feba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEBA 10604 bytes
SHA-256: 9646906b934f497ebc9a034a06ac70b8abdfbe0df3f4043fa87b9f0d645c6ce3

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