Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f846c310988a178…

MALICIOUS

PDF

38.9 KB Created: 2021-09-07 03:37:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 760634027636b6e5d0a92f2997803b72 SHA-1: 6e7c2001c3fc41ab56f89152c07eebaede3aea0b SHA-256: 2f846c310988a17853914e866c9efe9eadba51d1a98a2fdc192d9581d90688b4
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of a phishing lure. It contains numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggesting an attempt to redirect users to malicious sites. The document body is heavily obfuscated and appears to be a screenshot lure, typical for phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8588

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 38 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://wastran.ru/uplcv?utm_term=manual+huawei+p10+plus+espa%C3%B1ol PDF link annotation
    • http://ankurgroups.com/userfiles/file/38552606234.pdfIn PDF document text
    • http://www.hausbaumesse.at/ckfinder/userfiles/files/jisufenixewirebonanugedik.pdfIn PDF document text
    • https://doucetplasticsurgery.com/ckfinder/userfiles/files/dajuxisojexiwufemagi.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/71547576260.pdfIn PDF document text
    • https://ijacr.net/assets_admin/ckfinder/core/connector/php/uploads/files/lirigesumitafejidevoto.pdfIn PDF document text
    • http://canxetaidientu.com/images/file/mumabumubadapuzopat.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f393e2869cb---jufujitaruxerawaxakibir.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b233c732801---tolezoditiviwuxujafawire.pdfIn PDF document text
    • http://blissrenewbeauty.com/newerac2c/userfiles/file/luvevarilikub.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/okjiqdf9dogjk1d5g59qolq6d6/44726444450.pdfIn PDF document text
    • http://m4krichmond.org/clients/3/3b/3bf4c986be49c21931b3574e72fd8103/File/kijixoravovakajemovuwoli.pdfIn PDF document text
    • http://sanxuatbanthinghiem.org/app/webroot/uploads/files/80504063287.pdfIn PDF document text
    • http://criollo-cocoa.com/userfiles/file/18101402681.pdfIn PDF document text
    • http://billsky.ee/files/file/vovusewofaxosalonutosozi.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/804f967cbeb597dd42047a59e9c3f7a5/82576865607.pdfIn PDF document text

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