Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6f6d3e11b7f6d04…

MALICIOUS

PDF

73.1 KB Created: 2021-02-19 05:17:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 54db5fbc89889443a581a2ad5c5e526f SHA-1: 40121d8e6b2f886c0ef02e9de16e7ca5a329c08c SHA-256: b6f6d3e11b7f6d0431cd1a95d0a8c0294ab2d1e2cc3ec0092206a5a00de9f293
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://seumenha.ru/wb?keyword=metal%20gear%202%20big%20boss%20death PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380869/normal_602ddd0720842.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420018/normal_6012914d22325.pdfIn PDF document text
    • http://excschool.ru/88937169401rqcyl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425926/normal_5fc9f71a977d8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460966/normal_5ffd6fa70c6c9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481423/normal_5fe1b85d3c765.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493209/normal_5ff64a228a3cb.pdfIn PDF document text
    • http://dimax.website/dufakijanegam0au6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408584/normal_5ff7b83f49aa8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457876/normal_5fd79ee8d9109.pdfIn PDF document text
    • https://mafobosapufi.weebly.com/uploads/1/3/4/5/134505980/4945817.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458431/normal_5fd6351501215.pdfIn PDF document text
    • https://jarofuzaduse.weebly.com/uploads/1/3/4/5/134502270/gosetixuzexiwokasad.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/wunupalezozerud/5098658953.pdfIn PDF document text
    • http://bonizeza.epizy.com/algebra_questions_for_cat.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_off0000e1fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1FD 5364 bytes
SHA-256: 757761611405fcc4a507888d0123270c3f22cbd708acb7861fb6d687d4d95b46
font_01_sfnt_off0000f439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF439 10268 bytes
SHA-256: 58711591cd15f80678690eda1414f661899b93a98543dfd21baa467e8c6caea6