Malicious PDF — malware analysis report

Static analysis result for SHA-256 854873628b99f9d5…

MALICIOUS

PDF

40.4 KB Created: 2021-06-30 03:52:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 75c47e36d76bbc7937a6e5698f6e2899 SHA-1: 1e0876f6e5100756c9b41a9a83ee54be6404bc8e SHA-256: 854873628b99f9d50f54c0dcc7c8671e98e20c309155007dffe76459ac730eb4
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is designed as a screenshot lure, presenting an image to trick users into interacting with embedded links. The numerous external URLs, many pointing to compromised WordPress sites, suggest a phishing or malware distribution campaign. ClamAV detection and ML classification confirm its malicious nature, likely serving as a delivery mechanism for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8966

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 40 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://crewmak.ru/uplcv?utm_term=daffodils+in+snow
    • http://woodwork.pl/ubezpiecz/obrazy/file/9339914826.pdf
    • https://almoheetmanpower.com/public_html/userfiles/file/gudasusajid.pdf
    • http://tgtech-auto.com/userfiles/file/tageponifudilomeleb.pdf
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ff688de77d---zonosivupiraxaj.pdf
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608f5cc7de814---82186902493.pdf
    • https://rmp-familienanzeigen.de/cms/files/66293675618.pdf
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/fe5g2hta91ngkp1h9v6ifhu6ap/lavikuweduzudameto.pdf
    • https://flardochform.se/userfiles/file/61862916631.pdf
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/1e9b58f62e5360d0409706284c0c2314/10675248550.pdf
    • http://jkbprivateiti.com/userfiles/file/xedijumelamedakoxobasobob.pdf
    • http://supermarketdv.ru/files/file/74680736604.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/fabaf22d0b5868bdd934256bfd37e921/65872747568.pdf
    • https://tl-systems.hu/files/files/tunumizigilaganu.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/22126a25a7f040368c04d5fc4cc617a1/sewudufebudukafurenadanin.pdf
    • https://sunrise-photon.com/upfiles/editor/files/finulatata.pdf
    • https://szaniterplaza.hu/ckfinder/userfiles/files/novamobutovexasukoxeveri.pdf
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160777a5976d80---muwogifanunosefebuga.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/aceb55b1e9e21c2eaefd9a3409656944/49597891305.pdf
    • http://goref.ru/files/file/toverawubaguwadakokopiw.pdf
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/ec53172e5a07f853ae52c3f37ef9ade5/10033029752.pdf
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c5ed81e4d4e---84487377791.pdf

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