Malicious PDF — malware analysis report

Static analysis result for SHA-256 de01f4aed116c76d…

MALICIOUS

PDF

39.6 KB Created: 2021-06-21 17:06:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: d1de1c7754dd1d1cbacfbabfb8ac9bc9 SHA-1: 9a5256ec4d263aba1b99743eca1864014ac8a4d5 SHA-256: de01f4aed116c76d9c76f1369a3a238ebb1e2f3e96b217ca96edee938799afee
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and uses an image-based lure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7882

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 39 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://langestrand.se/anvandarbilder/204/files/zafosenukonadutedime.pdf In PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/n7n50rmg6etn2mk62deqa6339l/58990726824.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/c3433428297cbad197cda343256921df/jejusubikafixamuj.pdfIn PDF document text
    • https://unicornproduction.gr/wp-content/plugins/super-forms/uploads/php/files/9c02757820ca514fe953dfbc75a096e8/82540884754.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/cnggdn0sf9vm086ngi4mpuf2et/mogexibi.pdfIn PDF document text
    • http://goodtraefarm.com/ckupload/files/pisalusoxumoxa.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/b5fe2b585f570f491d8b6578eec49407/13252159538.pdfIn PDF document text
    • http://dlevitin.ru/fck_editor_files/files/60075951875.pdfIn PDF document text
    • http://sanphamhanquocymy.com/uploads/files/98965852098.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160a35d98e1586---17068445979.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c33eedc9e5d---lazigi.pdfIn PDF document text
    • https://olterus.com/contents//files/88680092778.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160739f9066e36---41959360024.pdfIn PDF document text
    • http://sobinco.cz/ckfinder/userfiles/files/dekimemefiturokezibeg.pdfIn PDF document text
    • http://argyler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607132e6147b5---kogurapamidan.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16077aab85e99f---23032542276.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/16093d443a00ad---napofajijozisumujem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=longman+english+dictionary+pdf+free+downloadPDF link annotation

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