Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea4489f21fef28ed…

MALICIOUS

PDF

49.8 KB Created: 2021-05-24 18:57:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c8c52155554e7460493cebb3f89876de SHA-1: b61b93821587e6b28c7ac947239a0c0ac5b4c4e9 SHA-256: ea4489f21fef28ed909717cc6930775d49cb0537c1980cf60891057583ee5a21
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is designed as a lure, presenting itself as a game download to entice users to click on embedded links. The numerous external URLs, many hosted on compromised WordPress sites, suggest a link farm intended to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7460

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 49 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://cructi.ru/uplcv?utm_term=game+rise+of+kingdoms+mod+apk+1.0.24.17
    • https://energooptima.hu/upload/File/laribenituleji.pdf
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/69f2348a067df250c32fbc461fc9bb62/bujemetag.pdf
    • https://accesoriosalmayor.com/images/userfiles/file/25404644463.pdf
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c540bcfbc1---fajumaparevita.pdf
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a57a1a4a1c---xewuwukelejisagojakokez.pdf
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/63dca6d640b5b71959290fb940be4e04/20366220981.pdf
    • http://stlnsk.ru/uploads/file/tekonigujujinu.pdf
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac897e9c1e---74748485641.pdf
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/d2221f3bdffd767f3f4f6bba0549fdb0/96261400262.pdf
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a6a5c76e9c---pogenapavawiwoxose.pdf
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/fa9v9ulvejbj27vhdmv3eh3njh/48154789770.pdf
    • http://aaaexpressheating.com/userfiles/file/46324821108.pdf
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160708fc21b1d6---falovugasab.pdf
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/16072545ab05a7---47214954026.pdf
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/16096a7654dee6---80086487223.pdf
    • http://tuzvedo.hu/elemek/file/niwulopovoweruxetotij.pdf
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a2dec4f639---vufizow.pdf

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