Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9e2d2655cf465d0…

MALICIOUS

PDF

68.4 KB Created: 2021-09-02 12:27:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: fd9191d27ca96fb4f8cfa76c1d8ef3bc SHA-1: 5868df5372cccb67e513a6bb37bfcbd1af7ed845 SHA-256: f9e2d2655cf465d0d69a1d19648d322ade8001aadf73bf1d5d120e0b36e346cc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress sites and potentially disposable hosting domains. The embedded URLs suggest an attempt to distribute phishing content or further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://huntic.ru/uplcv?utm_term=recaro+racer+car+seat+manual PDF link annotation
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c63697670be---sezoxuvirulutemevo.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/c89181f4ab0ea073d205f6cf63d5bb34/9682386871.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b04bed4e65---34844382912.pdfIn PDF document text
    • http://eastendmediation.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/11762093310.pdfIn PDF document text
    • http://kepco-group.com/uploaded_files/userfiles/files/7121102448.pdfIn PDF document text
    • http://reanda.com/jingkelun/userfiles/files/20210825104416.pdfIn PDF document text
    • http://xn--dlek-5qa.com/admin/UserFiles/file/88444897027.pdfIn PDF document text
    • https://stancijanegrin.com/UserFiles/files/26201757901.pdfIn PDF document text
    • http://allycatering.com/userfiles/fuvezetoxa.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608235702c95b---51617471809.pdfIn PDF document text
    • http://isvpro.com/custom/files/somobewaxa.pdfIn PDF document text
    • https://jairdefreitas.com/ckfinder/userfiles/files/33636088326.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c858ca1c160---vazup.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9333998013---debaruporaso.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/74666827b5680be6b6dfcb6132099767/niguvixuxebusugirovonor.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7499a0ad9---77222051859.pdfIn PDF document text
    • http://sanruou.com/app/webroot/uploads/files/94222040516.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/4167c39bcd1e505bcfc1804354399be1/82225942506.pdfIn PDF document text
    • http://worthingtonpark101.com/userimages/tigevexin.pdfIn PDF document text
    • http://ebonit.light.bg/includes/libs/ckfinder/userfiles/files/31665235048.pdfIn PDF document text
    • http://hemeringen.de/ckeditor_ablage/userfiles/files/zewobak.pdfIn PDF document text
    • http://www.corazondelsol.es/ckfinder/userfiles/files/66150068174.pdfIn PDF document text
    • http://www.cenlaenvironmental.com/siteuploads/editorimg/file/72338077539.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB100 14144 bytes
SHA-256: 029c945e258334aabb533a277bc0a80dff1eea81bf39c756a906fa32a099028e
font_01_sfnt_off0000d443.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD443 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ec5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5A 10444 bytes
SHA-256: a31758008a7fd8ca4ae8c7d2ae5b9e42954602b4f5ba7e26fa3a56e5e8fa285b

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