Malicious PDF / .VIR — malware analysis report

Static analysis result for SHA-256 8c9c73955da4b0cb…

MALICIOUS

PDF / .VIR

64.9 KB Created: 2023-11-02 04:56:28 +02:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 5.15.10) First seen: 2024-10-09
MD5: 1cbc3736701b8b51b7fe28cc3f34ffbd SHA-1: e7a33c5346516f66e7009b3cd9b04ec4bcbe3a2e SHA-256: 8c9c73955da4b0cb4c81465cfc7f3c9ab2fb8d8ba687e5d3772586c7ea8fa401
224 Risk Score

Machine Learning

  • Nyx PDF Classifier clean score 0.0530

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • Clickable PDF combines external action with parser-evasion structure high PDF_ACTION_PARSER_EVASION
    PDF has an external clickable URI together with object graph or xref structures that make parsers disagree, such as divergent duplicate objects, parser divergence, or xref offset mismatch. That combination is stronger than a plain link: the document is both an outward-action carrier and a parser-confusion/evasion sample.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 2 image(s), only 0 text block(s), carries a click-outward action, and is only 64 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • Image-only PDF lure with a single link to a non-reputable host medium PDF_IMAGE_LURE_NONREPUTABLE_LINK
    PDF is image-heavy with little real text and its only clickable action is a single external link to a host that is not known-good. This is the canonical malspam carrier shape — a screenshot-like 'click to view' page whose sole purpose is to funnel the victim to one redirect/landing URL on a compromised or throwaway domain. Flagged suspicious rather than malicious because the link alone (no shortener / typosquat / brand path) is the only corroborator beyond the image lure.
  • 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://zekawewe.lovali.co.za/804580524792739268?lusurezopolodobowitasawuwasozobodilubuxakokuwobet=zotuxovevegesutotavezilulolebasukoresivimipivadabetaduzefawavelunuwesemogadetuzejifivefitusinoxifelusodonubefexanomezogibalevejosimexifarajedezebubilunelixonedovitikovidawemofuzodiritikufuxekipizitojotem&keyword=can+a+single+catholic+deacon+get+married&naxunebijuvilurozavevokujopixitoxorotutokaserovujidanisaxebebimafib=rajatajasodikijokuketuparabukukepegituxomirenopijoxikobufibulalomugajaxilokexeginuzejeralogidudavirerobutalixadupuzili In PDF document text
    • https://zekawewe.lovali.co.za/804580524792739268?lusurezopolodobowitasawuwasozobodilubuxakokuwobet=zotuxovevegesutotavezilulolebasukoresivimipivadabetaduzefawavelunuwesemogadetuzejifivefitusinoxifelusodonubefexanomezogibalevejosimexifarajedezebubilunelixonedovitikovidawemofuzodiritikufuxekipizitojotIn PDF document text
    • https://zekawewe.lovali.co.za/804580524792739268?lusurezopolodobowitasawuwasozobodilubuxakokuwobet=zotuxovevegesutotavezilulolebasukoresivimipivadabetaduzefawavelunuwesemogadetuzejifivefitusinoxifelusodonubefexanomezogibalevejosimexifarajedezebubilunelixonedovitikovidawemofuzodiritikufuxekipizitojotem&keyword=can+a+single+catholic+deacon+get+married&naxunebijuvilurozavevokujopixitoxorotutokaserovujidanisaxebebimafib=rajatajasodikijokuketuparabukukepegituxomirenopijoxikobufibulalomugajaxilokexegiIn 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://dejavu.sourceforge.netIn extracted file (font_00_sfnt_off0000cd9f.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000cd9f.bin)
🗂 Part of campaign: shared payload a02f67deb0 41 samples

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD9F 10836 bytes
SHA-256: 4dc68cfdace3fea9b6823ac455cff7ba161fb7fca6b885f94935a63905067355
font_01_sfnt_off0000e63f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63F 8940 bytes
SHA-256: a02f67deb084b7ce8e02d7004994a9dd7e3132fe24919a42c6f0df6ed367c188