Malicious PDF — malware analysis report

Static analysis result for SHA-256 049412fbb85780a8…

MALICIOUS

PDF

75.5 KB Created: 2021-02-22 15:45:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: b01561142c4a469f5f722e85945f2c72 SHA-1: 74b8d1533f7d80a7d3b44a021a6b2d17f665aeb1 SHA-256: 049412fbb85780a80fa8cce7e94bd1fe90591fe6bc4c7ff4cfe71df1b244ee24
146 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically identified as a link farm on disposable hosting. The 'SE_CALLBACK_LURE' heuristic suggests a phishing or tech-support scam context. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classification strongly indicate malicious intent, likely to redirect users to malicious sites for credential harvesting or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://jacksth.ru/strik?utm_term=harbor+freight+battery+tender+review PDF link annotation
    • https://cdn.sqhk.co/nuxoporerom/Fghwhgh/ok_senior_golf_association.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467564/normal_5fca5f9324591.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490141/normal_5ffc47069b2d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408187/normal_5fd34e256917e.pdfIn PDF document text
    • https://cdn.sqhk.co/xotosobupis/O0ij4jj/zetoxafijobuxima.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453144/normal_5fe158b80e3a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421478/normal_5fd0d38915239.pdfIn PDF document text
    • https://cdn.sqhk.co/letonolomo/ggWhbjb/vertigo_maneuver_youtube.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444095/normal_5fd8157d151f9.pdfIn PDF document text
    • http://idealicaitalia.website/xiroxi1jhnh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416940/normal_6001cc8e19d75.pdfIn PDF document text
    • http://llloooodddd.space/gestational_hypertension_management_guidelineswmnkq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453342/normal_602696ba894d6.pdfIn PDF document text
    • http://copyrightproblem.com/jupojisorapifonejafowuftuxu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415946/normal_6015c9db7108c.pdfIn PDF document text
    • http://haustova.com/7734754655ro1fy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://napizexem.rf.gd/john_deere_lawn_tractor_spare_parts_uk.pdfIn PDF document text
    • http://budekibume.epizy.com/when_the_emperor_was_divine_full_book_free.pdfIn PDF document text
    • http://resimibesogew.rf.gd/how_to_address_a_letter_of_recommendation_for_college.pdfIn PDF document text
    • http://gexagulajiv.rf.gd/bonderite_1455_technical_data_sheet.pdfIn PDF document text
    • http://mivuwujat.rf.gd/android_auto_start_service_on_boot.pdfIn PDF document text
    • http://puwomuf.rf.gd/vativufiwixanaper.pdfIn PDF document text
    • http://jofeliruf.rf.gd/hopkins_belize_fly_fishing_guides.pdfIn PDF document text
    • http://firuwasuwubo.epizy.com/burumulufamowir.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_off0000e7fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7FE 5316 bytes
SHA-256: a4d11905e78041479cacfb1ea35a04f0f430949026ede84b8abe97e2ebb23966
font_01_sfnt_off0000fa26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA26 11272 bytes
SHA-256: 61bec37d30f887cd6a2fe669168f2f3382a938341c25378f52c7cb989dc83690

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