Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f46ad2288fba964…

MALICIOUS

PDF

40.1 KB Created: 2021-06-17 05:42:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: ea6af2eeeba51c2365660d1850e34fa0 SHA-1: 39071241623f189775e144ca697261fab7b6e933 SHA-256: 1f46ad2288fba9640ebf75533a641734a149ba8a8d41cc1f1f3c4c57cad8ee98
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 0.9056

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://ketchas.ru/uplcv?utm_term=dinner+invitation+email+to+colleagues PDF link annotation
    • http://aksaaydinlatma.com/img/editor/image/file/vatakinamaramer.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/10a39b9f093d80520307a903aad894ed/zukejaribibumak.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607812ba0f9ce---taxojorunagifelikofab.pdfIn PDF document text
    • https://ascinfratech.com/clientprojects/trading/file/50349688857.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b93a69bbbba---nudofovimula.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a52c6d522cd---gutanilovujakef.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/a0b6c588fb5d2d928a83e174bf42dae7/gatezaxotenedazupefigexov.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/v7fti8723q8ijm5ddf9jai3uig/67313122118.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/59k7c4iuebe1q168h6ncp2po56/vejorov.pdfIn PDF document text
    • https://weddingitaly.jp/images/file/kabavurevo.pdfIn PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/5550a4c099de7d60dbf26a020351da88/liberuletapozawaravomuj.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/26190769190.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b6632f4ec63---ditolapilonap.pdfIn PDF document text
    • http://moscow-vernisage.com/files/files/33796992904.pdfIn PDF document text

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