Malicious PDF / .VIR — malware analysis report

Static analysis result for SHA-256 c709094f4b58a507…

MALICIOUS

PDF / .VIR

502.6 KB Created: 2023-10-09 07:33:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2024-10-09
MD5: 47afbdabd0182a9694f3a82185f59b4b SHA-1: bbb71ad98955bb4bc4be6e30ac9e84212722d0bd SHA-256: c709094f4b58a507690dac2c3822f3e14e6f38ff8b77389e9a39c172c6805a37
186 Risk Score

Machine Learning

  • Nyx PDF Classifier clean score 0.0146

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.
  • 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.
  • 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://zedisineto.foaptoa.com/95282063259271581321492209?minejumuwolimodomuzapedupebiresotejolirijozananawekenogoxotulaluwajadogavuwikuwonupadopusid=jawepinigopetepavalabodimegunanozesotanubovizomepakigupejawupokatowububorapolesigazaxexiwejerexelepexikoditikopalukasebisuziwojowevemoxutirazebevaroworijoxedijuzivutoxelemepawugelilowulobuzaxefejidogewuwap&keyword=shortest+name+in+the+world+guinness+book+of+records&sawiwoxuwuronisititexazekaboxebiweturedekufanabuxamibulazonarozeperorotipikerebereletur=rajugokubetexakidukabetepijuvinonidodabefaremawabiluzitumudasalapodukesijiviwisibizarowizegoliwozofogekabaxopejobasupiwotemixoroxed In PDF document text
    • https://zedisineto.foaptoa.com/95282063259271581321492209?minejumuwolimodomuzapedupebiresotejolirijozananawekenogoxotulaluwajadogavuwikuwonupadopusid=jawepinigopetepavalabodimegunanozesotanubovizomepakigupejawupokatowububorapolesigazaxexiwejerexelepexikoditikopalukasebisuziwojowevemoxutirazebevarowoPDF link annotation
    • https://zedisineto.foaptoa.com/95282063259271581321492209?minejumuwolimodomuzapedupebiresotejolirijozananawekenogoxotulaluwajadogavuwikuwonupadopusid=jawepinigopetepavalabodimegunanozesotanubovizomepakigupejawupokatowububorapolesigazaxexiwejerexelepexikoditikopalukasebisuziwojowevemoxutirazebevaroworijoxedijuzivutoxelemepawugelilowulobuzaxefejidogewuwap&keyword=shortest+name+in+the+world+guinness+book+of+records&sawiwoxuwuronisititexazekaboxebiweturedekufanabuxamibulazonarozeperorotipikereberelePDF 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_off000782a1.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off000782a1.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000782a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x782A1 18040 bytes
SHA-256: f413f2d2a929f358f986c8f26a36def0bca7a41c840b1816112259b815be429f
font_01_sfnt_off0007b13e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B13E 11416 bytes
SHA-256: d5849afe867d2e4b19f98da5f331a6639eb9565f853262a30a5fbd787554c6b3