Malicious PDF — malware analysis report

Static analysis result for SHA-256 fefc59a09b09ff5e…

MALICIOUS

PDF

71.6 KB Created: 2021-02-14 05:05:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 182107f15134905e6159d2ee4866a67b SHA-1: 2867087cee2ee5b2288a57efa59fea577406f5ef SHA-256: fefc59a09b09ff5ec50095eff92af5fd683fff5c93b8262805c4857dfac94d1f
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable hosting and link farms, a common tactic for distributing malware or phishing content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites, likely for initial access via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=d%2526d+3.5+prestige+classes+for+fighters PDF link annotation
    • https://vuwarudud.weebly.com/uploads/1/3/5/3/135314702/1166697.pdfIn PDF document text
    • https://cdn.sqhk.co/tefozakozup/ijhjwSs/magic_school_story_apk_uptodown.pdfIn PDF document text
    • http://jinitevuwug.iblogger.org/html5_navigation_bar_templates.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420766/normal_6019b54c3a6fe.pdfIn PDF document text
    • http://xibipumazanepir.iblogger.org/manageengine_patch_manager_plus_installation_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/gomiwopizi/idgemia/joloxagugufemupusiti.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409799/normal_5fde58cd3fe00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370989/normal_601c88d79ed17.pdfIn PDF document text
    • https://cdn.sqhk.co/zutujodara/hNzojf3/spurs_ticket_login.pdfIn PDF document text
    • https://kawapojironene.weebly.com/uploads/1/3/1/6/131637385/fanumize.pdfIn PDF document text
    • https://cdn.sqhk.co/bomemenun/gcgcDjj/verefigesawaperonopa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390663/normal_60134b6b3ba49.pdfIn PDF document text
    • https://cdn.sqhk.co/dizoketa/8gi8Jgd/mycricket_app_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/xefijumu/Mhamgfo/31220462727.pdfIn PDF document text
    • https://cdn.sqhk.co/buvaboda/ghcEPij/the_office_quiz_questions_and_answers.pdfIn PDF document text
    • http://femukujisidape.iblogger.org/67585764514.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://tivemuga.rf.gd/flemington_form_guide_melbourne_cup_day.pdfIn PDF document text
    • http://gawasaxe.epizy.com/23150656565.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_off0000d591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD591 3484 bytes
SHA-256: b6bc3e761eca8ae26333d0367913862b9788f7109bed8a3dd2635371d897bba1
font_01_sfnt_off0000e0fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0FD 10224 bytes
SHA-256: 9b857ca5e770ae98f544beb30c6bca80e0b66d3b83336212532030e60d79e304
font_02_sfnt_off00010409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10409 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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