Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1f22f2645c227b4…

MALICIOUS

PDF

64.9 KB Created: 2021-02-10 14:34:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 74c8be72e177fb18a6bac3ddec59cf05 SHA-1: 10b668af73c864cead7ca6e3217b052f212b1e79 SHA-256: b1f22f2645c227b4ec5cb72fe87df84d07103971d968ffd9fa98895390c8ab1a
136 Risk Score

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/123?utm_term=wild+sheep+chase+dnd+5e+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4423166/normal_5fd9861f329cf.pdfIn PDF document text
    • https://cdn.sqhk.co/vopunokapire/j46bghe/among_us_free_pc_online.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478928/normal_5fc69f1bbcfb6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372360/normal_5fe3f97035aae.pdfIn PDF document text
    • https://cdn.sqhk.co/rureroso/9ggjhhd/toon_blast_candy_crush.pdfIn PDF document text
    • https://zakoponuzu.weebly.com/uploads/1/3/5/9/135992890/259de639313703f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491152/normal_601ffcbdd24d3.pdfIn PDF document text
    • https://cdn.sqhk.co/torujazelome/dqji3oz/zifubufexonid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467979/normal_6016d9061ba3a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481423/normal_5ff23cbc72d15.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368781/normal_5fc98a6ab4779.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/midaguvimabof/texas_chainsaw_massacre_2013_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/99693786363.pdfIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/low_back_stabilization_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/end_of_employment_contract_letter_template.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_off0000c215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC215 5284 bytes
SHA-256: 5be57db75e1be599ca10eed5c775ac270b37944fff2085206736d63617b26196
font_01_sfnt_off0000d423.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD423 10176 bytes
SHA-256: 7dbbef0019baa5a28eb186ee867c26e4f679346d6a63001d1931fa1c2081ea57