Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9a64e74c025c4d8…

MALICIOUS

PDF

53.0 KB Created: 2021-09-13 03:00:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 480809cdfac6d8857424aa18e93ff281 SHA-1: 44a5a4a8872c9a05887c0080a9e5c73b7888fadf SHA-256: c9a64e74c025c4d830cdf445831bbbac9009af94c345fc7e34bbe7a0b8fd6f1d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on disposable domains or compromised CMS upload directories, indicating a link farm for phishing or malware distribution. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically identified as a phishing trojan. No scripts were extracted, but the structure and URL patterns are consistent with a malicious PDF designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9260

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 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://catamma.ru/uplcv?utm_term=wombo+ai+download PDF link annotation
    • https://airshow-bg.com/file/tamesujonuxed.pdfIn PDF document text
    • http://newworldss.com/uploads/file/32023431134.pdfIn PDF document text
    • https://foulardfotografando.it/file/goxalegadopajin.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/bfoa7gr5pct0miot6p39rus84h/zuvonefumivofanexuna.pdfIn PDF document text
    • http://www.enredmail.com/templates/files/idCliente_/file/jevifixirudifipofobum.pdfIn PDF document text
    • http://architettodrabeni.it/userfiles/files/27251520241.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e75768ccf0---tuzafebulegoxavujok.pdfIn PDF document text
    • https://indiachristian.org/uploads/files/84853728739.pdfIn PDF document text
    • http://partnercable.com/files/demonumadaniguwipo.pdfIn PDF document text
    • https://businesslife.com/content/file/28133193654.pdfIn PDF document text
    • http://n2nlah.org/UserFiles/file/57269623440.pdfIn PDF document text
    • https://isitekmuhendislik.com/userfiles/file/43133126906.pdfIn PDF document text
    • http://studiofranzoni.eu/userfiles/files/wavuko.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/88rcasgq4e31fl33l07rttgoo0/xigezubafisi.pdfIn PDF document text
    • http://sushiyaslo.com/uploads/files/vakoni.pdfIn PDF document text
    • http://flapboxes.com/userfiles/files/goluxiratanuvelanome.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/66424913370.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613361c138353---busuxotilen.pdfIn PDF document text
    • http://namadagaskare.ru/ckfinder/userfiles/files/33330145608.pdfIn PDF document text
    • http://sz-nuoyi.com/Upload/file/2021091202101890881.pdfIn PDF document text
    • http://www.scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/225592767.pdfIn PDF document text
    • https://www.spitalmoldovanoua.ro/ckfinder/userfiles/files/nuboxasamolovisif.pdfIn PDF document text
    • http://tokyoto.pl/UserFiles/file/99297792684.pdfIn PDF document text
    • http://www.lovebliss.tw/UserFiles/files/wuxopenepegivaxekaj.pdfIn PDF document text

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