Malicious PDF — malware analysis report

Static analysis result for SHA-256 f14359500a4d546d…

MALICIOUS

PDF

44.1 KB Created: 2021-09-05 06:14:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f260d2c93ee0ce1a282870c41570a0c3 SHA-1: a458d0211480a1d456b20093c2ca1080851f30ad SHA-256: f14359500a4d546dea7c465b5c3007dec282f36f3b70f4b0e72ff71060bdd0a1
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a heuristic firing indicating it is an image-only document with an action trigger, typical of a phishing lure. It also contains numerous links to external domains, many of which are hosted on compromised CMS uploads or disposable hosting, suggesting a link farm intended to redirect users. The ClamAV detection and ML classifier further support its malicious nature. No scripts were extracted, but the overall structure points to a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5805

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 44 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 http://www.findvoters.com/userfiles/file/linexipas.pdf In PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16115bd31e80d4---42512581571.pdfIn PDF document text
    • http://teusz.pl/UserFiles/file/14130359152.pdfIn PDF document text
    • http://prinsart.ro/uploads/files/nijupokinevejurik.pdfIn PDF document text
    • http://ck-kutnahora.cz/gais/image/file/48925559822.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160779e8b14a94---ditazotarunodi.pdfIn PDF document text
    • https://deniz-sogutma.org/img/userfiles/file/38673979940.pdfIn PDF document text
    • https://iaido-iaijutsu.ru/userfiles_exc/38698588325.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/161260d43d1062---pilajezibawifejikimizan.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9ed4856d0f---7196503467.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/b4b2f21d38a2b5db9c3b8ec644700cba/99373950642.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c25c2610b---46390272239.pdfIn PDF document text
    • http://www.smwiarus.pl/ckfinder/userfiles/files/98404571852.pdfIn PDF document text
    • https://topclassgreenery.nl/images/file/kakaxufubufaziwawisupira.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6e32f637e5---reduxodujesejunefol.pdfIn PDF document text
    • https://condominiovillage.com/userfiles/file/gosawojar.pdfIn PDF document text
    • https://lawyerupsmart.com/tempimg/file/75682959389.pdfIn PDF document text
    • http://zulassungsdienst4you.de/bilder/file/64607329022.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16072347fd93b7---zugezet.pdfIn PDF document text
    • http://centroolosprato.it/userfiles/files/loruzupukokomotalerovog.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3a2adbc58b---83571419133.pdfIn PDF document text
    • http://netmutum.com/userfiles/file/71774212219.pdfIn PDF document text
    • http://walthamclassof1985.com/clients/5/52/52060312c10aa816a718e90a19a6a7a1/File/24785332440.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5ade503a5d---zudagejesak.pdfIn PDF document text
    • https://kit-veron.my/ckfinder/userfiles/files/68710700770.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/18ak2t8updul145idfdcvdntff/pukegepoxurujivisaza.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=enlarge+pdf+file+size+in+kb+onlinePDF link annotation