Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2413b11bd563964…

MALICIOUS

PDF

39.0 KB Created: 2021-06-14 19:49:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 942665242d8df1abf86925548869e571 SHA-1: a623407af553013ca01664220196fe00239202a1 SHA-256: e2413b11bd56396464a24fed4c866d7d19cda0b2d5ce8923d817d16dba0cd67c
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 0.7465

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://garglob.ru/uplcv?utm_term=earth+%2526+moon+in+hd+gyro+3d+pro+parallax+wallpaper+apk PDF link annotation
    • http://inspirationforexcellence.com/clients/66491/File/tuzopetulefibujikigisefo.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a2d770767e---dizikexopalovagokobaz.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210507131137387.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/7492ac5fda94272589c7a26d60b2feeb/ropigizezufozajuguvovova.pdfIn PDF document text
    • https://aucordechasse.fr/vosImages/9396494745.pdfIn PDF document text
    • http://orosweb.hu/ckfinder/userfiles/files/nawib.pdfIn PDF document text
    • https://deltagroup.bg/uploads/file/96179624749.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/3e55ea17144ca21973cc6cea6b472331/malidonadito.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ba7282bedde---gumak.pdfIn PDF document text
    • http://aprendanow.com/wp-content/plugins/super-forms/uploads/php/files/9fc59cf651e18f8f6d7f9ac0c1fec43c/turibakume.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/51745a25fdd2e2cae3f4d06c504756b9/puwaze.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/dsqqhu47iv12dicmtqg8uddpgn/gebogu.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16099d761b8ae1---8112505455.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7d5f18c9ff---muloxodexipituzef.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-uIn PDF document text

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