Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8d14e31661b2247…

MALICIOUS

PDF

75.4 KB Created: 2021-04-25 23:03:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: ed9870594815cf2c27a73dac9f7f0e16 SHA-1: 081e66f63ef9fc6a04c686782a0e2a4fc24e147b SHA-256: e8d14e31661b2247baf9e24f87a1c2a5d9abe8aafc2f62a38053918692d53084
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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://baarspo.ru/strik?utm_term=carpentry+books+for+beginners+pdf PDF link annotation
    • https://cdn.sqhk.co/puwipaneke/1jiDIhb/can_ibs_cause_stomach_pain_and_nausea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376609/normal_606e551079533.pdfIn PDF document text
    • https://cdn.sqhk.co/numokafas/2cl3Wn6/ruxuze.pdfIn PDF document text
    • https://cdn.sqhk.co/luwagoma/hbhaCjh/94870414149.pdfIn PDF document text
    • https://cdn.sqhk.co/nejibija/hchjZzd/ladavokebekufapuvaj.pdfIn PDF document text
    • https://cdn.sqhk.co/kojagopomon/gN6BidS/43056624352.pdfIn PDF document text
    • https://cdn.sqhk.co/salenasova/e4ieegi/24402739338.pdfIn PDF document text
    • http://jabewes.medianewsonline.com/bioinstrumentation_john_g._webster.pdfIn PDF document text
    • https://cdn.sqhk.co/vimewiki/hMeZgB6/wabofewujosifujimuw.pdfIn PDF document text
    • https://cdn.sqhk.co/kikutajaz/ehiZgge/ruzilijuzifegol.pdfIn PDF document text
    • http://tuxesimufimiti.mypressonline.com/caterpillar_iso_9001_certification.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481993/normal_5fdf98c79821c.pdfIn PDF document text
    • https://cdn.sqhk.co/fovipobex/ijgGSjf/9808159595.pdfIn PDF document text
    • https://cdn.sqhk.co/xegapanasa/1fieljg/beach_buggy_racing_2_shortcuts_crab_cove.pdfIn PDF document text
    • https://cdn.sqhk.co/lupobikud/M0EXjas/gavasikilimozido.pdfIn PDF document text
    • https://cdn.sqhk.co/vakolitakap/h5yohan/64816979180.pdfIn PDF document text
    • http://probmaka.tech/fedawumizcsw3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493600/normal_602206cacfe17.pdfIn PDF document text
    • http://stroy-level.ru/ferrari_logo_wallpaper_for_android2jpc6.pdfIn PDF document text
    • http://weareanonymous.org/visimotrqlw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gidubabe.myartsonline.com/.pdfIn PDF document text
    • http://jifisuxevizek.myartsonline.com/97184297424.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_off0000e4b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B9 5388 bytes
SHA-256: 8fa77b7606d94376ef96d375e557c9c5d246e8fe4c70d2ee19e3cae8438e5002
font_01_sfnt_off0000f721.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF721 12292 bytes
SHA-256: 735f5baea670aaaeff760bab5cb08c9f94749ed370a083e509617e60173fb6c3

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