Malicious PDF — malware analysis report

Static analysis result for SHA-256 69bc41449f8c8b29…

MALICIOUS

PDF

79.7 KB Created: 2021-03-19 12:55:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 1c9c50d0ea7d01d7912e28adcc71aa94 SHA-1: 8548db26706a6091831568b766ef697d64678f31 SHA-256: 69bc41449f8c8b29832fbbbf21561bc4449b8e6a98537fdf6cd0b4ae977d95d8
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, many pointing to PDF files hosted on link farms, suggesting a phishing or malware distribution campaign. The document body, though heavily obfuscated, appears to be a lure related to technical specifications, directing users to potentially malicious URLs like https://vilenefex.ru/strik?utm_term=2007+kubota+l3010+specs.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://vilenefex.ru/strik?utm_term=2007+kubota+l3010+specs PDF link annotation
    • https://cdn.sqhk.co/vilonunufuk/gsgeji7/runopivuxopem.pdfIn PDF document text
    • https://cdn.sqhk.co/motuvitewodi/7hcdVvo/43610999204.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426071/normal_5fe89c8d73dd7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486983/normal_5fe6594a7096d.pdfIn PDF document text
    • https://cdn.sqhk.co/pazaxefuma/ierahis/america_s_got_talent_arrow_apple.pdfIn PDF document text
    • https://cdn.sqhk.co/dozirolizilu/icUrYgf/interrogative_sentences_worksheets_with_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/pamomusemida/gfziax7/pawipijafobefivemab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408703/normal_601e3c7a9081d.pdfIn PDF document text
    • https://cdn.sqhk.co/tefozakozup/fFGjigh/nerf_gun_ball_launcher_for_dogs.pdfIn PDF document text
    • https://cdn.sqhk.co/zezetemirag/lLjcK07/bixugoxevutezilesukew.pdfIn PDF document text
    • https://cdn.sqhk.co/jukowejazus/gcqE3jg/impulse_response_function_in_r.pdfIn PDF document text
    • https://cdn.sqhk.co/paxepilekot/IrWjgid/physics_class_9_download.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/nowokil/69892807755.pdfIn PDF document text
    • https://ad9e3d1f-bb22-46ca-892e-b6aa3325a756.filesusr.com/ugd/837d34_3528cda2aa8946779488be6b58d7b7df.pdf?index=trueIn PDF document text
    • https://df9240ce-57b4-430e-a582-521170ca5232.filesusr.com/ugd/10b03a_02a047b3626940628495d8fca885753f.pdf?index=trueIn PDF document text
    • https://858e1da1-ad31-4e5b-aec0-89c59c6c71f6.filesusr.com/ugd/6240f8_409c5767fc8440c0bfc807448b2dc4aa.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/mozilla_firefox_developer_version_free.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/xuzubitavowuxibojokune.pdfIn PDF document text
    • https://s3.amazonaws.com/fidobakipivogit/godinosu.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_off0000f42d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF42D 5508 bytes
SHA-256: ba28ea3df81f85930e3671305666ab8c7eb379dae24aa8f241f99be5727beee1
font_01_sfnt_off00010708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10708 11960 bytes
SHA-256: 02d2b4d174f845a9be3f176c7afcdaa8320dc13c35b6ee16315131c7066d0f8d

Open this report in the interactive analyzer, or submit your own file for analysis.