Malicious PDF / .VIR — malware analysis report

Static analysis result for SHA-256 aafcd4b1364a7ea9…

MALICIOUS

PDF / .VIR

689.6 KB Created: 2023-08-13 10:26:22 Authoring application: PDF Studio First seen: 2024-04-28
MD5: 4dabc2299caea6db0bb2a3c2664f491c SHA-1: 8ce618c2b83b19b35ce89f2f6820e6bd23c9aed5 SHA-256: aafcd4b1364a7ea92ab810e87e066597c506d19a1b42dde38539d808f54bba35
276 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.7905

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Viral-video clickbait PDF links to suspicious host critical SE_VIRAL_VIDEO_CLICKBAIT_LINK
    Document uses viral/leaked-video lure text and links to a suspicious disposable-looking web host. This is a clickbait/traffic-scam carrier shape rather than a benign PDF link.
  • 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.co.ck/ddm/clk/408533097;208818505;l;;%3F//finaj.popejedowe.cfd/2142239.pdf In PDF document text
    • https://adservice.google.com.mt/ddm/clk/408533097;208818505;l;;%3F//fundamentals-of-corporate-finance-5th-ca.zahnarzt-praxis-achern.de/kosutelagof.pdfIn PDF document text
    • http://changer-des-euros-en-livres-sterling-au.il-lectronic.com/wupe.pdfIn PDF document text
    • https://adservice.google.com.ag/ddm/clk/295204063;122181591;w;;%3F//zemegen.pumumoxif.cfd/630.pdfIn PDF document text
    • https://mail-merge-with-pdf-attachment.mebexub.sbs/dagag.pdfIn PDF document text
    • https://bizoxuvuno.yenene.co.za/756771338769566910?kenekatosinokokisobajitagogetakigibarar=gotirisafowuromuwejisawejamadowiniwatasoxezimunadakugodoxowesibatusafazewulakefijaxobaroxelokalewazegujokasomotikefuwodabugimiwazazilezivatabutixifuzizurajogomibuxubiworufebaligufetivofasukuwasafikowaxanafenupu&keyword=cvor+application+guide+ontario&talexiketilimelefekowofiwuninifezijitofevozanewefejesafebevebixutegamizobujelalabawegujolise=legexubusikidaleliwaboxenefuvavinovuwaxitovekajareregaribajopazokimesafijixovitofabovomofulokivezonudifavuwogutujudajinimIn PDF document text
    • https://bizoxuvuno.yenene.co.za/756771338769566910?kenekatosinokokisobajitagogetakigibarar=gotirisafowuromuwejisawejamadowiniwatasoxezimunadakugodoxowesibatusafazewulakefijaxobaroxelokalewazegujokasomotikefuwodabugimiwazazilezivatabutixifuzizurajogomibuxubiworufebaligufetivofasukuwasafikowaxanafenupPDF link annotation
    • https://bizoxuvuno.yenene.co.za/756771338769566910?kenekatosinokokisobajitagogetakigibarar=gotirisafowuromuwejisawejamadowiniwatasoxezimunadakugodoxowesibatusafazewulakefijaxobaroxelokalewazegujokasomotikefuwodabugimiwazazilezivatabutixifuzizurajogomibuxubiworufebaligufetivofasukuwasafikowaxanafenupu&keyword=cvor+application+guide+ontario&talexiketilimelefekowofiwuninifezijitofevozanewefejesafebevebixutegamizobujelalabawegujolise=legexubusikidaleliwaboxenefuvavinovuwaxitovekajareregaribajopazokiPDF link annotation
    • https://adservice.google.de/ddm/clk/478229754;284365575;c;;%3F//management-accounting-4th-edition-will-s.lunivus.cfd/dilasafizigiz.pdfIn PDF document text
    • https://adservice.google.pt/ddm/clk/478229754;284365575;c;;%3F//change-font-size-on-fillable-pdf.navarugelo.cfd/mofivem.pdfIn PDF document text
    • http://adservice.google.am/ddm/clk/300948314;127869103;e;;%3F//manga-go-toubun-pdf.nyinfluencers.com/lerelulomikebogivo.pdfIn PDF document text
    • http://adservice.google.co.nz/ddm/clk/408405163;208572896;n;;%3F//vevor-ice-machine-manual.press-conference.online/60.pdfIn PDF document text
    • http://adservice.google.tg/ddm/clk/300948314;127869103;e;;%3F//nivel-de-burbuja-partes.dom.quest/lideseda.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_off000a73b8.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off000a73b8.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000a73b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA73B8 11116 bytes
SHA-256: 909ab90798eb4fc54f24525fd86976a298696647ce7fb6fb9ec4a1fd93c3499d
font_01_sfnt_off000a8d82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8D82 16612 bytes
SHA-256: 4a2bb7a6d866cab63b16d9ce649a52e1e6541f05fbb94105249d7a6a4c50fdc2