Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d2af682d29d083d…

MALICIOUS

PDF

72.4 KB Created: 2021-02-25 05:18:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 1005c81e83d4ea541c8ae3aacfa3c634 SHA-1: 130038ad4ecab1dbe6a755cc16acaa13cdef8d6c SHA-256: 9d2af682d29d083de87e8303f67478feeb70a580488774055b56e49cd28cc378
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/award?keyword=this+is+amazing+grace+key+of+g+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4456728/normal_5fceb0cea352a.pdfIn PDF document text
    • https://kuwovewifinux.weebly.com/uploads/1/3/0/7/130775990/ponodi-tizadus.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498842/normal_6002c3dea0cbc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406516/normal_6025362be45c9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450513/normal_5fddfcdc2888d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416331/normal_5fca45de952e0.pdfIn PDF document text
    • http://help-business-media.com/93461734469z1jc9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391649/normal_602dcc8ff114d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418557/normal_5ffd0d3414e19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391898/normal_600d2f8c9007e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505837/normal_60275bb77818c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rizivubonulej.atwebpages.com/how_much_does_a_kenmore_dryer_belt_cost.pdfIn PDF document text
    • http://sebumevavu.epizy.com/core_connections_algebra_1_answers_chapter_2.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_off0000d68d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD68D 5700 bytes
SHA-256: e5652f103fe4bf1de818e10ebe2800343cf59a72e5a029c19b5c7774aaaa6a8d
font_01_sfnt_off0000e9e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E1 13772 bytes
SHA-256: a4c445fa56d077c2e975f0ccb780843040c83f2990684908d1953062a72297cf