Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fb89488a169e633…

MALICIOUS

PDF

42.9 KB Created: 2021-08-08 05:52:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: a5e36540fd14b120d34734960fe49291 SHA-1: d8d28cd15816478254f29be5c9226e2264f385a0 SHA-256: 5fb89488a169e63379f0c84befde4447e1b3c223af7609cf7aa3570d5d4b2efe
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 0.6964

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 42 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://chcial.ru/uplcv?utm_term=www.amazon.com%2Fmytv+enter+code+samsung PDF link annotation
    • https://acronimocostanzo.com/userfiles/file/tadusokumemizax.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/xebawizisijikolixa.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f84e66eba4---78495323668.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/1608a2a2277cc1---25002127683.pdfIn PDF document text
    • https://i-intelli.com/ckfinder/userfiles/files/58692091706.pdfIn PDF document text
    • http://famillespourstarlight.org/clients/a/a9/a9b42c05011d3bb27e7f7ec2ed30324f/File/902238694.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16093f477887fb---disowedelufafukine.pdfIn PDF document text
    • http://belean.pl/userfiles/file/poxovoxavuvetemefe.pdfIn PDF document text
    • http://holmeslawfirm-iowa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/12165049681.pdfIn PDF document text
    • https://ntct-dz.com/ckfinder/userfiles/files/tolodidagoja.pdfIn PDF document text
    • https://aldurra.ly/images-editeur/img/file/nupus.pdfIn PDF document text
    • https://tepihtrava.rs//files/jatozize.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071d5bcd2a13---zewafapinoleperus.pdfIn PDF document text
    • https://goooinggroup.com/userfiles/files/20210627_162245.pdfIn PDF document text
    • https://sjalikave.hu/pictures/file/godeveselunitax.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609b8da16db99---48459262372.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/b323592b63e35cdea04a7edbdf7f080c/lifez.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8b20fb3d2a---33563860801.pdfIn PDF document text
    • http://www.dereformasenalicante.com/archivos/files/10408190265.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160731c5c00add---tineditobepan.pdfIn PDF document text
    • http://katour.ru/admin/ckfinder/userfiles/files/75135622490.pdfIn PDF document text
    • http://vietkinggroup.com/uploads/userfiles/file/45515957164.pdfIn PDF document text
    • http://hondasushi.com/uploads/files/jepisorajoga.pdfIn PDF document text
    • https://akproauto.net/nbloom/fckuploads/file/92479710408.pdfIn PDF document text
    • https://deltagroup.bg/uploads/file/pegazedejugis.pdfIn PDF document text

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