Malicious PDF — malware analysis report

Static analysis result for SHA-256 86d4353359005b2a…

MALICIOUS

PDF

72.4 KB Created: 2021-02-02 23:13:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: ca2fbcb6942cda04779613640750dc64 SHA-1: 23fef0212b11ecf4a90cad0cdfd9baa4b85deae1 SHA-256: 86d4353359005b2a713b0c4c16314a94ed433966a706636b07c503ce9ba49a38
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/aws?utm_term=amd+a4+3330mx+graphics+driver+free PDF link annotation
    • https://cdn.sqhk.co/roweziwamu/icjhOhe/89400328942.pdfIn PDF document text
    • https://cdn.sqhk.co/lilomovetum/heYicpy/pezikikinedutivumate.pdfIn PDF document text
    • https://cdn.sqhk.co/mogezunir/ehjihcx/karog.pdfIn PDF document text
    • https://cdn.sqhk.co/bewagolene/c2jto6H/44048945148.pdfIn PDF document text
    • https://cdn.sqhk.co/waxipefimafa/ODfRhfG/67534423258.pdfIn PDF document text
    • https://cdn.sqhk.co/nitunoda/SphbIic/mod_for_among_us_imposter_hack_download.pdfIn PDF document text
    • http://leree4.club/kexomodivelawoforza444.pdfIn PDF document text
    • https://debozolajaxagaf.weebly.com/uploads/1/3/1/0/131070846/866be.pdfIn PDF document text
    • https://cdn.sqhk.co/dufolatik/igciggi/96725467411.pdfIn PDF document text
    • https://cdn.sqhk.co/vogidasobe/ijii7Xf/emperor_and_beauties_game_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470014/normal_5fe7c7ea9e8fb.pdfIn PDF document text
    • https://cdn.sqhk.co/kagelemovo/9ChaijF/angry_birds_friends_facebook_cheats.pdfIn PDF document text
    • https://cdn.sqhk.co/fenozidu/9OOlcYc/78340716429.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376379/normal_5ffd2b3158ad6.pdfIn PDF document text
    • http://ita-fitness.fun/crazy_russian_hacker_german_mrelzjju.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_off0000dc0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC0C 6048 bytes
SHA-256: 058102853a20c42f5a3c90daba75347df28d6b088d778985401c84b49d06cdbb
font_01_sfnt_off0000f08b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08B 11016 bytes
SHA-256: 027a2e77d38afddcdaf3423da803f72d750200a05ad1863d223d094e0b772667