Malicious PDF — malware analysis report

Static analysis result for SHA-256 192de2f6de4caaa0…

MALICIOUS

PDF

82.2 KB Created: 2021-06-09 11:50:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 887fc556f260ed170596087fef0f09a1 SHA-1: dda7581bbaf4391bab7eeec1c75369f2652e9cae SHA-256: 192de2f6de4caaa0e698400762f11f95f0f8a80528bdaa071ba44f3c69ffa848
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

The PDF contains a link farm with numerous external links, many of which are hosted on Weebly and point to other PDFs, suggesting a coordinated effort to distribute malicious content. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' indicates the document's content is designed to deceive users with promises of prizes or funds, further supported by the presence of URLs like 'pistant.ru' which appears to be related to software cracks or serial keys. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://pistant.ru/pbw?utm_term=driver+booster+6.5+serial+key
    • https://dunefofitibo.weebly.com/uploads/1/3/4/6/134608320/jaxubojudusovir-ragep-rizanaz-tobeveja.pdf
    • https://cdn-cms.f-static.net/uploads/4471484/normal_5fd1769c30d30.pdf
    • https://milanesove.weebly.com/uploads/1/3/1/3/131383497/bizemezozewi-tisoka-nabagavejole.pdf
    • https://patelevikukel.weebly.com/uploads/1/3/4/6/134665122/d55619.pdf
    • https://mikedexe.weebly.com/uploads/1/3/1/4/131452733/loxumezivuxakunekoj.pdf
    • https://cdn-cms.f-static.net/uploads/4455894/normal_601704546e26a.pdf
    • https://dudererojafa.weebly.com/uploads/1/3/4/3/134362298/runakufoj-ludixipo.pdf
    • https://puxibaso.weebly.com/uploads/1/3/0/9/130968956/jujil-fikizopivukupov.pdf
    • https://cdn-cms.f-static.net/uploads/4425921/normal_603631e408857.pdf
    • https://tovadifu.weebly.com/uploads/1/3/4/0/134096489/4773467.pdf
    • https://mosozedap.weebly.com/uploads/1/3/1/8/131856454/wutufikewinusi.pdf
    • https://cdn-cms.f-static.net/uploads/4463272/normal_601dda460e9c0.pdf
    • https://kutujenedida.weebly.com/uploads/1/3/4/7/134759749/wazupuwetu.pdf
    • https://feditesar.weebly.com/uploads/1/3/1/4/131483001/dcad850b541b6.pdf
    • https://cdn-cms.f-static.net/uploads/4391024/normal_60b84b457b3cd.pdf
    • https://cdn-cms.f-static.net/uploads/4449775/normal_600b2a5ab663e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/9629315d-650c-4a91-90e6-9774e20182f3/how_to_mine_for_ethereum.pdf
    • https://uploads.strikinglycdn.com/files/6952f209-dde7-4d5f-b5f9-6d9a2d1cd9b9/bagalitejimevasukixugit.pdf
    • http://pefagisunel.pbworks.com/w/file/fetch/144488193/formato_de_mantenimiento_preventivo_para_camiones.pdf
    • https://uploads.strikinglycdn.com/files/ed82e03d-f3d0-4efd-9563-b9680bd89663/pictures_of_hollis_woods_movie_cast.pdf
    • https://uploads.strikinglycdn.com/files/acfecc7d-09eb-4359-af36-369594382829/vuzokadudawexiw.pdf
    • http://fomefegaf.pbworks.com/f/fascinating_womanhood_free.pdf
    • http://gulisapil.pbworks.com/w/file/fetch/144805806/ps3_emulator_android_roms.pdf
    • https://uploads.strikinglycdn.com/files/e075a5ea-4610-4272-9e21-4139ac525f06/97112291.pdf
    • http://niluputevi.pbworks.com/w/file/fetch/144700167/how_to_setup_vizio_soundbar_to_samsung_tv.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100f6.bin
cac964a573e9a370a3e27f9ce888fa0db1f9b6d0f1219024d9cc1d76548336a0
pdf-font-stream PDF embedded font (sfnt) at offset 0x100F6 5352 bytes
font_01_sfnt_off00011355.bin
4af003057c376a01e1c443fbeefe81fbe740ce56eeb574c2357b34b40375d734
pdf-font-stream PDF embedded font (sfnt) at offset 0x11355 11764 bytes