Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1a9bb3420b3018f…

MALICIOUS

PDF

241.6 KB Created: 2021-07-31 00:15:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: bc9f2e96ae98c4fd3f71c48420b53919 SHA-1: d850c7918ca6f4dfce229e7b98197a9bf20b74e1 SHA-256: b1a9bb3420b3018f6fa8ba26f7d60ed6607af5468852b5849665021f2cd10f41
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external resources hosted on compromised WordPress sites, indicated by the PDF_RANDOM_URL_LINK and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics. The ML classifier and ClamAV also flagged this file as malicious, specifically as a phishing trojan. The embedded URLs likely serve as a lure to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9024

Heuristics 5

  • 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.
  • 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.
  • 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 http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160abe75d0d9f7---96337038423.pdf In PDF document text
    • http://studiopignotti.it/userfiles/files/71613273620.pdfIn PDF document text
    • https://burgas-remonti.com/userfiles/file/danugaduruvi.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/1bb976fe9ab0b72d53f7a2cd23454c29/medipesimaken.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b3bcb1530---24423763135.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/86d8099e2d2e68a880163644021d88d8/lofipijoxabesamixita.pdfIn PDF document text
    • https://atamergranit.com/userfiles/file/gezawa.pdfIn PDF document text
    • http://poorclarescork.ie/images/tudaweratabozigazerixad.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/16077e9974b85d---76758844769.pdfIn PDF document text
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/fugok4g7u9jjmqofrb617bdo65/tuxedipafuzeka.pdfIn PDF document text
    • http://jiendurancecoaching.com/ckfinder/userfiles/files/jamigoselan.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/c512cf5c7f51f3a84f711a043c3f795e/63627019617.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161000e31665d8---lowusubomewuwuduvigilofe.pdfIn PDF document text
    • http://westleyden72reunion.com/clients/4/46/469dc9162705cbff2d1fbe132f144f37/File/tavogosatapanakunidugum.pdfIn PDF document text
    • http://jarosi.hu/files/file/lijetizi.pdfIn PDF document text
    • http://glamour-nsk.ru/ckfinder/userfiles/files/98229004212.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097a7194076a---veliponitojewurekatu.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bf51689377---fogatimexulosafufufevazin.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/879e3fc5e3a78f4806dc2bae854ae67e/75089190615.pdfIn PDF document text
    • http://camel-republic.com/media/userfiles/files/87090389637.pdfIn PDF document text
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/dd601f02cd03e81b565cd3135a6d6473/valefunamujoda.pdfIn PDF document text
    • http://doverhighschoolhalloffame.com/clients/2/2d/2d76883e1086210ef8e2c43836b0327f/File/75503294204.pdfIn PDF document text
    • http://penzion-u-zamku.cz/files/file/12549908479.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/krnkje9s40l2r28l6u9ms7aie4/zatexajosipezitenekum.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=realidades+1+capitulo+2a+que+hacen+hoy+answers+page+37PDF link annotation

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