Malicious PDF — malware analysis report

Static analysis result for SHA-256 b503114b28738eac…

MALICIOUS

PDF

72.0 KB Created: 2021-08-26 13:01:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7fe28d99c49eb95f4f4e7ec223a9f14f SHA-1: 31be56a8bbe941a54a63c0a707fa62146eafa179 SHA-256: b503114b28738eac66b5fd20f730238b1a171f48546500f75b4c95b94bdf5e40
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and disposable hosting domains. These links are likely intended to lure users to malicious sites for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6688

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=space+wolf+deck+guide PDF link annotation
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160c86573c1b12---41396991571.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9ddd99d9d3---47074883026.pdfIn PDF document text
    • http://soflocops.com/clients/67403/File/raputi.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/16093d4592ebaf---96977246785.pdfIn PDF document text
    • http://vce34.ru/attachments/file/23995109053.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/16092eaa7374cf---63964078723.pdfIn PDF document text
    • https://muzpony.de/obrazki/file/zowawasesili.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9c45cda8c2ab69cae754a08ed98b8bfc/364447264.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/a823f84d891dc5c46b992afeb88c7128/latukibeb.pdfIn PDF document text
    • https://chataigne-cevennes.fr/imgs/files/15909832165.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/16106e8c7a8a42---xajajanamajuse.pdfIn PDF document text
    • http://hanboo.cn/Uploads/file/2021070221000970554.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/19760af1331dcc7927f76dcba9f6b4ec/temuwebajifapadawimisusem.pdfIn PDF document text
    • http://tubelessons.net/cms_images/file/wijedojeludineki.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a32b782dede---72850698410.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/e02d4ca3242a62ea35d5b2e9fa67d235/97168378586.pdfIn PDF document text
    • http://watthaistuttgart.de/userfiles/file/dajudopovedowokenobod.pdfIn PDF document text
    • http://olympicburger1988.com/uploads/files/jovelokagezi.pdfIn PDF document text
    • http://costanzolegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/821540816.pdfIn PDF document text
    • http://xn--m1age8bh.xn--p1ai/files/file/waseduxener.pdfIn PDF document text
    • http://vinhthuan.asia/upload/files/limopuzeg.pdfIn PDF document text
    • https://napraforgohotel.hu/upload/file/5333742545.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/7993d52d4a75533af1b8500806203f27/bivopag.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c732adb97ee---53125748779.pdfIn PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/1c577018f65648e38f5ac7868ab9acd7/52123407474.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ece1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE1 10680 bytes
SHA-256: 46d53757ab8219412601e29fada153d36f2693f0ac39b0a3ff9fe679f64b5eec