Malicious PDF — malware analysis report

Static analysis result for SHA-256 38d08955b17d9d26…

MALICIOUS

PDF

71.7 KB Created: 2021-02-12 08:25:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: b8df22ba2283871adf25446da327145f SHA-1: 1e6de68a18fb9cdd09184d4e8551ea797c4550ce SHA-256: 38d08955b17d9d26633d407dd34e017e38e87015b998ba70b9d8d13ad16af8ad
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://maypoin.ru/wix?keyword=chemistry+final+study+guide+semester+2 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4415061/normal_5fec307058bd5.pdfIn PDF document text
    • https://cdn.sqhk.co/letowajaf/jdjflgc/dragon_ball_legends_hack_2020.pdfIn PDF document text
    • https://vanazufir.weebly.com/uploads/1/3/2/7/132740694/3525051.pdfIn PDF document text
    • https://cdn.sqhk.co/xeviremal/hiiThcY/strikers_1945_plus_psp_cheats.pdfIn PDF document text
    • https://cdn.sqhk.co/dexizajifu/jerjezW/57378486681.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411694/normal_5ff3adb5c87c8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480898/normal_5fcd2635a6327.pdfIn PDF document text
    • https://cdn.sqhk.co/madumubo/mghgdhb/73236934515.pdfIn PDF document text
    • https://cdn.sqhk.co/pobijejok/EATljjs/lajitoji.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463287/normal_5fc9274da7a9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371267/normal_60152e8d0d352.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380854/normal_60126fe1dec5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464330/normal_601c68ab6fa6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485012/normal_601a24e9c2e6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418401/normal_60207a65e798d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419236/normal_5fd9639db301d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367304/normal_5fe81853786db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374953/normal_60139fcdde216.pdfIn PDF document text
    • http://megatorg.ru/pimujijod92ood.pdfIn PDF document text
    • https://jorosovepi.weebly.com/uploads/1/3/4/7/134706332/xavije.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000dbc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC2 5460 bytes
SHA-256: 9579f40e60c4a72bfdcdd7a231e1d2b8ddc484b4a829c4f5545440355ef8104f
font_01_sfnt_off0000ee2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2C 10252 bytes
SHA-256: 246b31d44af276b29afdc1bcf020dde792c1f030600e5573e0478414cae3c3b0

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