Malicious PDF / .VIR — malware analysis report

Static analysis result for SHA-256 28f898e8ca00be5f…

MALICIOUS

PDF / .VIR

78.2 KB Created: 2023-10-16 03:07:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2024-04-15
MD5: fb9b624b2301859e239586325d553eda SHA-1: 569216f42555c2c0dc55abbadce0ed99451f3dd0 SHA-256: 28f898e8ca00be5f4a71cdfba1b679c7cfb12e41d21b69c9d0b18ac76a187fb9
184 Risk Score

Machine Learning

  • Nyx PDF Classifier clean score 0.0699

Heuristics 7

  • 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.
  • 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 2 text block(s), carries a click-outward action, and is only 78 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://zebidujowomif.haviol.co.za/448712279?fazelodiruxixodaxozaseluposifaxazufonidagaguvazemewixabekifotakig=vewaminakuzojazezasaxamikaliwebagoxeguxutufilowuxogemazidokukalazivupixijuruxoninunoresokexexafijupabezogeminizevoxomafenetajugetoxujusegedimabigusutidikekoxobodapipumibujivufemodosesoxidigimekemebazosibew&utm_kwd=child+craft+soho+4+in+1+crib+manual&tunogubiwunegaxigapivafowariweguvavokovese=gisoxarapiwewuxagekuxafaditamerufakebatuzutexuraboxoxoxavariwofufobazukaxonowoselivelidolibigufujizoziwiviborigatibodalanapogobonix In PDF document text
    • https://zebidujowomif.haviol.co.za/448712279?fazelodiruxixodaxozaseluposifaxazufonidagaguvazemewixabekifotakig=vewaminakuzojazezasaxamikaliwebagoxeguxutufilowuxogemazidokukalazivupixijuruxoninunoresokexexafijupabezogeminizevoxomafenetajugetoxujusegedimabigusutidikekoxobodapipumibujivufemodosesoxidigIn PDF document text
    • https://zebidujowomif.haviol.co.za/448712279?fazelodiruxixodaxozaseluposifaxazufonidagaguvazemewixabekifotakig=vewaminakuzojazezasaxamikaliwebagoxeguxutufilowuxogemazidokukalazivupixijuruxoninunoresokexexafijupabezogeminizevoxomafenetajugetoxujusegedimabigusutidikekoxobodapipumibujivufemodosesoxidigimekemebazosibew&utm_kwd=child+craft+soho+4+in+1+crib+manual&tunogubiwunegaxigapivafowariweguvavokovese=gisoxarapiwewuxagekuxafaditamerufakebatuzutexuraboxoxoxavariwofufobazukaxonowoselivelidolibigufuIn 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_off0000ef39.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000ef39.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF39 11308 bytes
SHA-256: 56aeb1f9ecf46051bd780f49546e3301b38e3c3aa808c0338f0d888f7dabb759
font_01_sfnt_off000109c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C7 13800 bytes
SHA-256: dc21ee928916c8601afc7377f7b6bc607deec61748295bf11eeea7279910ce3a