Malicious PDF — malware analysis report

Static analysis result for SHA-256 995baa1340aa5794…

MALICIOUS

PDF

43.1 KB Created: 2021-09-15 23:56:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 3249ed3007832aea55a217b2e5fc5b3a SHA-1: 9849c23297456c6144f18a0fc0852953e1917d3f SHA-256: 995baa1340aa57943fdb3937e3d0eaef5d408bb2a2f656d7fd441927c5cdee04
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV also detecting it as a phishing trojan. The heuristics indicate it's an image-only lure designed to trick users into clicking embedded links. These links point to various domains, many of which appear to be compromised WordPress sites, suggesting a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7479

Heuristics 6

  • 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-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 43 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://nomylo.ru/uplcv?utm_term=sites+to+watch+bollywood+movies+with+english+subtitles PDF link annotation
    • http://dichvuhangngay.vn/uploads/image/files/35560006540.pdfIn PDF document text
    • http://grgct.com/ckfinder/userfiles/files/46953010950.pdfIn PDF document text
    • http://ultraljud.nu/bild/files/pofibugakawofeneva.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1613a4ad284598---28269746987.pdfIn PDF document text
    • http://architettoannalisatinelli.it/userfiles/files/90382186281.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/161327ee405d10---18836925470.pdfIn PDF document text
    • http://jenan.com/ckfinder/userfiles/files/33735268791.pdfIn PDF document text
    • https://phm.vn/upload/files/mekexipavoratiloboxuvo.pdfIn PDF document text
    • http://terredellamagnagrecia.com/userfiles/files/garesoderiruzoluwopebak.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1613b8bdc6511f---suvesositararurufafujuku.pdfIn PDF document text
    • https://www.channeloflove.com/ckfinder/userfiles/files/95126187943.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/161370cd07d5b0---39766837155.pdfIn PDF document text
    • http://creatinglifeoptions.com/userfiles/files/keretumexokawedegod.pdfIn PDF document text
    • http://www.detskaoptika.cz/ckfinder/userfiles/files/ketexilojikufev.pdfIn PDF document text
    • http://ifap.it/images/file/novogedorisesed.pdfIn PDF document text
    • https://moderator.lt/components/com_mijoshop/opencart/image/data/files/44412634418.pdfIn PDF document text
    • https://fulzugaskozpont.hu/files/momik.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/b24ac246dc62a6f54d0b8c7c989140d5/58550327786.pdfIn PDF document text
    • http://kolesnikov.pro/ckfinder/userfiles/files/4521052336.pdfIn PDF document text
    • http://alt-1c.ru/userfiles/file/govanog.pdfIn PDF document text
    • https://producedepot.us/userfiles/files/66789959757.pdfIn PDF document text
    • http://take114.kr/FileData/ckfinder/files/20210914_074E1AECAD8C9E25.pdfIn PDF document text
    • http://missteenqueenuk.com/userfiles/file/sifujerodemifikunozuzes.pdfIn PDF document text

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