Malicious PDF / .VIR — malware analysis report

Static analysis result for SHA-256 86d8133e95950631…

MALICIOUS

PDF / .VIR

346.2 KB Created: 2023-10-10 20:45:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2024-04-16
MD5: cb57e3c85a3722649b1acf8ad422beaa SHA-1: 546c7338fb3db9085b3735abdba33aeb19a955a1 SHA-256: 86d8133e95950631bcba3535a2e5787d4c8d2ad5f3de1181ae5d1eee7256f8a8
146 Risk Score

Machine Learning

  • Nyx PDF Classifier clean score 0.0566

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://ridogune.tevav.co.za/5665793432288937472243?midasozomituwofujisatasigowivapirapafolabinewipigogoxebunadomegitu=pofidexasepufexejekugigokizadafobuguzowurofimikupatabulexajogozomarowunexirokuwasipukijegifuzujatapuziwoderumomesotomexajazazosakiwojodesozibodilegulokeziwolulojapikumerasezasalenemawiladinupudiradudep&utm_kwd=breaking+lease+email+template&parakerojulubutilimodiviwitokasevaxiginamukosaxisozosavivazazoxudapixenofininawarinolofakakivujuka=vilumisofenegesawopawikafuvatexerigumotusipoxetitutokilonozazunizudigadolufesarepezenilosufuveromomopejizofavuwelimiwewazakenore In PDF document text
    • https://ridogune.tevav.co.za/5665793432288937472243?midasozomituwofujisatasigowivapirapafolabinewipigogoxebunadomegitu=pofidexasepufexejekugigokizadafobuguzowurofimikupatabulexajogozomarowunexirokuwasipukijegifuzujatapuziwoderumomesotomexajazazosakiwojodesozibodilegulokeziwolulojapikumerasezasalenemPDF link annotation
    • https://ridogune.tevav.co.za/5665793432288937472243?midasozomituwofujisatasigowivapirapafolabinewipigogoxebunadomegitu=pofidexasepufexejekugigokizadafobuguzowurofimikupatabulexajogozomarowunexirokuwasipukijegifuzujatapuziwoderumomesotomexajazazosakiwojodesozibodilegulokeziwolulojapikumerasezasalenemawiladinupudiradudep&utm_kwd=breaking+lease+email+template&parakerojulubutilimodiviwitokasevaxiginamukosaxisozosavivazazoxudapixenofininawarinolofakakivujuka=vilumisofenegesawopawikafuvatexerigumotusiPDF link annotation
    • 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_off00051fd9.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off00051fd9.bin)
🗂 Part of campaign: shared payload a02f67deb0 41 samples

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00051fd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51FD9 16188 bytes
SHA-256: 4bc12807826414f8fb2acd10e86d55d7fb2aabea1015f65d72bec50304c98786
font_01_sfnt_off000549a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x549A1 8940 bytes
SHA-256: a02f67deb084b7ce8e02d7004994a9dd7e3132fe24919a42c6f0df6ed367c188