Malicious PDF — malware analysis report

Static analysis result for SHA-256 31e91fbade9fe418…

MALICIOUS

PDF

47.8 KB Created: 2021-07-06 21:25:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 051031abfa5579532579e5d752ba8fc0 SHA-1: 4d0f714561af458d76ecc653f3660c7c813f01cb SHA-256: 31e91fbade9fe418b3f6742ffd42413078248539d96d45e7bbe3ca9a5cdce950
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is structured as an image-only document with an action trigger, typical of a phishing lure. It also functions as a link farm pointing to numerous compromised CMS upload locations, suggesting an attempt to distribute malicious content or redirect users to phishing sites. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9298

Heuristics 7

  • 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 47 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/dc965e1475d9a7f63a0c546ba31326b0/wavija.pdf
    • http://bluecreator.biz/ckfinder/userfiles/files/bufazifonafadenosebot.pdf
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/kftovfgi8d83asciuivvelvstr/ledidekebabulezizagoj.pdf
    • https://myupfield.link/wp-content/plugins/super-forms/uploads/php/files/iiaejro6rub3khmvfsj299gt4h/tebotofunaxopudisivono.pdf
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b2e5bbc40f5114ae9f4b8181d9801969/fotovo.pdf
    • http://tensoinox.com/userfiles/files/masivijuxaxukudixana.pdf
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c7922a9f13b---budadefun.pdf
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609db65310629---84956444170.pdf
    • http://amphorabeautyclub.com/campannas/file/rukexenovubedugudujabonev.pdf
    • https://i-chat.tw/js/ckfinder/userfiles/files/misetuwarug.pdf
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/9tb6ng1vj33ldrvb1hgt9j7fd7/rofelejone.pdf
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/dbefc7a026f7afc45455bbf25a3a2df6/tazukukajaxiwade.pdf
    • https://sce.tw/uploads/files/60b626ec05f9b.pdf
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/17eb1587a7e5cdd2e3f5bfe7ed0c386a/lipowekapomevataxurej.pdf
    • http://ipceurope.eu/assets/file/65095098701.pdf
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b38dde7779---54336125645.pdf
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/fbe39d25r550h6vmiu907gg211/10857098577.pdf
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/8e0b234d116fe2450583d7c088dd7824/35765016971.pdf
    • http://clubselectionvoyages.com/images/file/69193633539.pdf
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/2cbe5387e4e5712756e6abd71b17ad9c/84613759807.pdf
    • https://capitalsyndic.com/userfiles/file/tefuzotejexuterab.pdf
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a7351e7f28---90906738119.pdf
    • http://www.sudaff.com/pics/file/nededamixekanukuranevu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=after+effects+text+reveal+template

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