Malicious PDF / .VIR — malware analysis report

Static analysis result for SHA-256 f67bfe5b536b82cf…

MALICIOUS

PDF / .VIR

289.5 KB Created: 2023-10-30 01:48:31 Authoring application: Nitro PDF First seen: 2024-11-16
MD5: 31f6fbb155ea2db05108db520ec9f545 SHA-1: 3ef5b5fad7e55ee93f0b3d0bb81948f73d41872d SHA-256: f67bfe5b536b82cf3029b2b9a8751c44dce18e4abe991a1e0bdf65af162555d0
216 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.6144

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://adservice.google.com.ly/ddm/clk/445204615;249060672;c;;%3F//uploads-ssl.webflow.com/64ee16bbcb9d0765dc08b87d/65658c5ea49c567ab0dbee07_kuteji.pdf In PDF document text
    • https://lizarom.xeltuve.com/58057087045078769359553634?wofonijomuvanupibukajexuwafakifuwofimerewuruteropakesodobuzamujevapavuxowuziwudigupazigivewiwelagexe=wopodanumojiwadexubaxurilirokaxizimawekerowikaxogutoluvezopafezevelovazeromalasajeluvutivajupuwunelowaduvimutubizuxasururuxobafibimopepipuzetiwinapigatobogurojipipaniwofunobozogovugivolamewizinuzuvemijave&utm_term=denise+swanson+new+book&pedutatamixidiwelibifaxafabizezusutakatigawatadavurumaxuwejonasafamoxulasakaloporipuwidite=ruzoxevanenitujubepivupusuraxarujibekanisopawebomovigujedukaruwikobasobamirazovoduporazerezenudavirubibekunobojupilewifixerebimalerubizodotufovusIn PDF document text
    • https://lizarom.xeltuve.com/58057087045078769359553634?wofonijomuvanupibukajexuwafakifuwofimerewuruteropakesodobuzamujevapavuxowuziwudigupazigivewiwelagexe=wopodanumojiwadexubaxurilirokaxizimawekerowikaxogutoluvezopafezevelovazeromalasajeluvutivajupuwunelowaduvimutubizuxasururuxobafibimopepipuzetiwiPDF link annotation
    • https://lizarom.xeltuve.com/58057087045078769359553634?wofonijomuvanupibukajexuwafakifuwofimerewuruteropakesodobuzamujevapavuxowuziwudigupazigivewiwelagexe=wopodanumojiwadexubaxurilirokaxizimawekerowikaxogutoluvezopafezevelovazeromalasajeluvutivajupuwunelowaduvimutubizuxasururuxobafibimopepipuzetiwinapigatobogurojipipaniwofunobozogovugivolamewizinuzuvemijave&utm_term=denise+swanson+new+book&pedutatamixidiwelibifaxafabizezusutakatigawatadavurumaxuwejonasafamoxulasakaloporipuwidite=ruzoxevanenitujPDF link annotation
    • https://adservice.google.co.jp/ddm/clk/408405163;208572896;n;;%3F//uploads-ssl.webflow.com/64f1a3eed7acc99e5ed6aca5/6565895330f4f04b81e82f24_92240611612.pdfIn PDF document text
    • https://adservice.google.pt/ddm/clk/408405163;208572896;n;;%3F//uploads-ssl.webflow.com/64edf6529c3c52ab816f80e3/65658b9f7307f8a2334cba42_56759409299.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_off00043479.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off00043479.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00043479.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x43479 11036 bytes
SHA-256: eaecce32237b67b9604c3d247efc4ed58f69dc2777e274d72adb9cb3277bdf91
font_01_sfnt_off00044dfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x44DFA 16296 bytes
SHA-256: 8144130bf0f50df8adfa4f7e700fc0c5856b9bae2524f8546d7a2d15f60257a9