Malicious PDF / .VIR — malware analysis report

Static analysis result for SHA-256 3f1a5c2ef87d0466…

MALICIOUS

PDF / .VIR

493.7 KB Created: 2023-11-05 10:34:31 +02:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 5.15.10) First seen: 2024-11-16
MD5: eacdb73bffec49c20e2f503e07d210b4 SHA-1: 74255f75944293b2fd9c34723f517f678c89f7e3 SHA-256: 3f1a5c2ef87d0466fe9477f37678f64cf823744fce69e323ddbd47ce8887ecab
146 Risk Score

Machine Learning

  • Nyx PDF Classifier clean score 0.0040

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
  • 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.
  • 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://namegudixuzelig.xenina.co.za/111805287054651470?vefawugijipefofigetajeko=lururiwogovabitatovubujuwozidufigavitobezokizepafanozefotuzapakowekubevugijemofurobinuwisoxosaxeduxigajajexozizejekemusenekoxaliduzujofabipifivedenipojinasibanakogijifafilojonopatudokivitazuvexelutatinatitu&utm_kwd=how+to+think+about+weird+things&lelisalonetexawilibimupivixizifiwexadipilaguzarikisazapugixudidus=jonagedebiruzonelatoziwemukejufazarogizupefuvexojokuxajeworenikinibarexegekezufinojegoriwutagitubodivaxivimogapexaw In PDF document text
    • https://namegudixuzelig.xenina.co.za/111805287054651470?vefawugijipefofigetajeko=lururiwogovabitatovubujuwozidufigavitobezokizepafanozefotuzapakowekubevugijemofurobinuwisoxosaxeduxigajajexozizejekemusenekoxaliduzujofabipifivedenipojinasibanakogijifafilojonopatudokivitazuvexelutatinatitu&utm_kwd=how+PDF link annotation
    • https://namegudixuzelig.xenina.co.za/111805287054651470?vefawugijipefofigetajeko=lururiwogovabitatovubujuwozidufigavitobezokizepafanozefotuzapakowekubevugijemofurobinuwisoxosaxeduxigajajexozizejekemusenekoxaliduzujofabipifivedenipojinasibanakogijifafilojonopatudokivitazuvexelutatinatitu&utm_kwd=how+to+think+about+weird+things&lelisalonetexawilibimupivixizifiwexadipilaguzarikisazapugixudidus=jonagedebiruzonelatoziwemukejufazarogizupefuvexojokuxajeworenikinibarexegekezufinojegoriwutagitubodivaxiviPDF link annotation
    • http://wenq.org/In extracted file (font_01_sfnt_off0006d331.bin)
    • 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 (stream_006_off00077173.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (stream_006_off00077173.bin)
    • http://nmr.mgh.harvard.edu/~fangq/In extracted file (font_01_sfnt_off0006d331.bin)
    • http://www.gnu.org/copyleft/gpl.htmlIn extracted file (font_01_sfnt_off0006d331.bin)
🗂 Part of campaign: wenq.org 13 samples

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00077173.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x77173 30916 bytes
SHA-256: 494c72ff0cf12d17ef3828201e9f0ce8b65a9b844c475ff2de566beb979c8662
font_00_sfnt_off0006a489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A489 17812 bytes
SHA-256: 7f7f2fb00a7bbc8d2b1997574cdcbd98429bbe32f4b24f2c3ee118cab191c11e
font_01_sfnt_off0006d331.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D331 47884 bytes
SHA-256: 7dfce753f4862750355821dbd5177446fc3509bae5da678e163be3a8e621fa4d
font_02_sfnt_off00075889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75889 10884 bytes
SHA-256: 2d9ce04e39bd686d8303a65642a51a45600f14db684eee00f5d9fb64fefd52ff