Malicious PDF / .VIR — malware analysis report

Static analysis result for SHA-256 8c412b4b4dd6bd31…

MALICIOUS

PDF / .VIR

505.0 KB Created: 2023-02-07 22:10:28 Authoring application: PDF Studio First seen: 2024-04-09
MD5: c98fb1f1aa8c2d8f3869c944e2d37f39 SHA-1: 28a99209fd784606d1a117d7c18afe9be2bcab20 SHA-256: 8c412b4b4dd6bd31631e13902fb7663ae56113eab9e891fce321b3932d47fbb9
256 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.8768

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
  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://descargar-planeaciones-de-preescolar-gra.potafof.cfd/5395824.pdf In PDF document text
    • https://libro-secreto-de-enoc-pdf.savanade.cfd/814511.pdfIn PDF document text
    • https://adservice.google.com.et/ddm/clk/424929466;226923624;r;;%3F//wunanifit.marieschefssoap.com/tam.pdfIn PDF document text
    • https://hibbeler-dynamics-12th-edition-solutions.tenaxeg.cfd/457.pdfIn PDF document text
    • https://dialogue-editing-for-motion-pictures-2nd.vanekubo.cfd/mid.pdfIn PDF document text
    • https://matufizoduse.petra-kienle.de/vojuxutigukid.pdfIn PDF document text
    • https://fuwuluxata.dabejule.cfd/juda.pdfIn PDF document text
    • https://xevijebon.vmoga.com/74.pdfIn PDF document text
    • https://adservice.google.co.tz/ddm/clk/448794861;252804937;a;;%3F//www-habilita-it-scarica-il-tuo-referto.lufolag.cfd/46.pdfIn PDF document text
    • https://adservice.google.com.vn/ddm/clk/424929466;226923624;r;;%3F//forester-xt-manual-for-sale.piwuzuwov.cfd/283284.pdfIn PDF document text
    • https://adservice.google.com.sl/ddm/clk/425484003;227454619;f;;%3F//namezumi.lakenakara.com/50.pdfIn PDF document text
    • https://lovell-s-guiding-light.vmoga.com/zabenefegip.pdfIn PDF document text
    • https://adservice.google.com.bz/ddm/clk/408533097;208818505;l;;%3F//jewuzado.moskau-berlin.de/gasutuwamuniwiju.pdfIn PDF document text
    • https://dulawi.tevav.co.za/8515985142147914755857?novunubimexubolorinipubujosorojanubawakejokujojabikepifofutuki=zatebezajunakojepufegowemezizoguwanedupusigixedogumuledagifisolewigasuwutanivalazeralimoweromejobidizijelifefepipekoxezisawedudomanafidejebajimikesejegudalajipakizijawuwimedojenibavotumafazuxunokazopugezerumaz&keyword=representative+payee+report+form+ssa-+6231&vadejanebateravonefokutagojokefosozinufeguzurafixetugefepamog=pisujanewobenesudetufumuwidivuvupovubafirisotuvobejutujevokonifepibetazepamawazegutudiluledikosomulutarojekinikiwenidiravizuduvanakenemazifewodidIn PDF document text
    • https://dulawi.tevav.co.za/8515985142147914755857?novunubimexubolorinipubujosorojanubawakejokujojabikepifofutuki=zatebezajunakojepufegowemezizoguwanedupusigixedogumuledagifisolewigasuwutanivalazeralimoweromejobidizijelifefepipekoxezisawedudomanafidejebajimikesejegudalajipakizijawuwimedojenibavotumafazuxunokazopugezerumaz&keyword=representative+payee+report+form+ssa-+6231&vadejanebateravonefokutagojokefosozinufeguzurafixetugefepamog=pisujanewobenesudetufumuwidivuvupovubafirisotuvobejutujevokonifePDF link annotation
    • https://dulawi.tevav.co.za/8515985142147914755857?novunubimexubolorinipubujosorojanubawakejokujojabikepifofutuki=zatebezajunakojepufegowemezizoguwanedupusigixedogumuledagifisolewigasuwutanivalazeralimoweromejobidizijelifefepipekoxezisawedudomanafidejebajimikesejegudalajipakizijawuwimedojenibavotumafPDF link annotation
    • https://adservice.google.dm/ddm/clk/424929466;226923624;r;;%3F//merge-pdf-files-for-free.gunubiguf.cfd/995.pdfIn PDF document text
    • https://adservice.google.com.mx/ddm/clk/424929466;226923624;r;;%3F//guide-to-california-planning-4th-edition.giramif.cfd/3.pdfIn PDF document text
    • https://adservice.google.ru/ddm/clk/466651624;272226156;i;;%3F//oce-td-s300-service-manual-pdf.domipuzu.cfd/144.pdfIn PDF document text
    • https://adservice.google.bi/ddm/clk/408405163;208572896;n;;%3F//nuvodo.pianobusters.com/2219016.pdfIn PDF document text
    • https://adservice.google.az/ddm/clk/295204063;122181591;w;;%3F//grove-city-community-center.navumedi.cfd/5410417.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_off00078fb2.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off00078fb2.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00078fb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78FB2 11596 bytes
SHA-256: b1d05bee82673d27fba63e231b08584f37f95d7e3080b91ba60aa58c3a684312
font_01_sfnt_off0007ab70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AB70 17324 bytes
SHA-256: 875473397ec2a61b8e108ffe1921833700d3b022f84458b4685f4ef8eba49321