Malicious PDF / .VIR — malware analysis report

Static analysis result for SHA-256 f8100dac387f7656…

MALICIOUS

PDF / .VIR

125.8 KB Created: 2023-10-17 22:32:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2024-07-14
MD5: 3ea36b7722fef737704dea4a24a68d63 SHA-1: 23930c057930d6596eecbcd585f3ae3b125ffa31 SHA-256: f8100dac387f76566962c0065d2ea304c7429f4f8bdc5b9a40f4ece4f19e353d
146 Risk Score

Machine Learning

  • Nyx PDF Classifier clean score 0.2202

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://gaginevetiteka.urseghy.com/1944078677794247200927?nutewabugalodemefolojilefobelin=wapawalinebokibejojuvalenifonavinoxovuberadikilawexubolalevetunadesukivetodisabelujoxanigofativinedoninodulewebawisidodarofijigopotukapitagegusemidabazabusudoxolitugaxarukadebarumiwesogofotebonamukari&utm_kwd=open+ended+maths+activities+pdf&tawuxititepolanitewanewixelimiluvasusewejesodarijabisulagevimexefawojozatidijulotupa=piwaxanavinosokexonodarobibesenifakarofekogesenevewujifuwuzuvuzajutejuxotolozanubelusunidajoribaxozariloluziwofavadoxolivudepuwixidotubibovasedesesa In PDF document text
    • https://gaginevetiteka.urseghy.com/1944078677794247200927?nutewabugalodemefolojilefobelin=wapawalinebokibejojuvalenifonavinoxovuberadikilawexubolalevetunadesukivetodisabelujoxanigofativinedoninodulewebawisidodarofijigopotukapitagegusemidabazabusudoxolitugaxarukadebarumiwesogofotebonamukari&utm_kwd=oPDF link annotation
    • https://gaginevetiteka.urseghy.com/1944078677794247200927?nutewabugalodemefolojilefobelin=wapawalinebokibejojuvalenifonavinoxovuberadikilawexubolalevetunadesukivetodisabelujoxanigofativinedoninodulewebawisidodarofijigopotukapitagegusemidabazabusudoxolitugaxarukadebarumiwesogofotebonamukari&utm_kwd=open+ended+maths+activities+pdf&tawuxititepolanitewanewixelimiluvasusewejesodarijabisulagevimexefawojozatidijulotupa=piwaxanavinosokexonodarobibesenifakarofekogesenevewujifuwuzuvuzajutejuxotolozanubeluPDF link annotation
    • https://5.imimg.com/data5/SELLER/Doc/2023/10/352916263/MH/AQ/GV/200261502/880fcf35-5595-43ee-ab92-319c6d034980.pdfIn 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_off0001b631.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0001b631.bin)
🗂 Part of campaign: shared payload a02f67deb0 41 samples

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B631 14104 bytes
SHA-256: 6fdc2ce33f7ff6195a85e25530ca9605042ae0fe0bd15487e8422df1321a51c1
font_01_sfnt_off0001d989.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D989 8940 bytes
SHA-256: a02f67deb084b7ce8e02d7004994a9dd7e3132fe24919a42c6f0df6ed367c188