Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ec7cfaf43149f3f…

MALICIOUS

PDF

79.7 KB Created: 2021-08-17 01:23:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ad8de992a787af6fea6b57d223c6d965 SHA-1: f47a6865f0614f2e6f3b8cc281f5febb13ad3cb4 SHA-256: 9ec7cfaf43149f3f8e6617d93e8bb0969a6f7f0af2398b510ca04e396776260f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to compromised WordPress upload directories and other disposable hosting. These links likely serve as a distribution mechanism for further malicious payloads or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • 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
  • 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://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/namo0q727t13g006p210cmtdbi/somakosojajojofadip.pdf In PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/ddd0388e86a117f60d27631b40a8842d/11930858489.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/16070b1a057560---jelowizanelis.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607668ede999c---286608066.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/32988158589.pdfIn PDF document text
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160807a534df8b---1012088828.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160773be36b513---kudazevevugisosobel.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/cff8cb46b371e00ccc53014c2e184e6c/zofazodedekezixosigorek.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/j8anp1qtf1ofrgqiadgqgeekud/2925148513.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/i5ig3r4oligcebaom1ph0qh9q3/bazizujokewepu.pdfIn PDF document text
    • https://hagabb.ro/ckfinder/userfiles/files/86534207857.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/3920cf5746e59fb80daef4dddc1b358c/29959917498.pdfIn PDF document text
    • https://digiconelectronics.com/media/45035769551.pdfIn PDF document text
    • http://martom24.pl/martom/userfiles/file/24583072999.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1608299b55cbc9---25448609677.pdfIn PDF document text
    • http://jyotiacademicpress.org/uploads/file/73583556869.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/46916863024.pdfIn PDF document text
    • https://kovosluzba-praha.cz/res/file/pelolipejafepigodekis.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/16073d3ef86c4e---bugumawapikafavemi.pdfIn PDF document text
    • http://novussiteyonetimi.com/uploads/file/3455280972.pdfIn PDF document text
    • http://aucoindeshalles.fr/menu/file/66139458773.pdfIn PDF document text
    • http://aygroupmuh.com/image/files/35096929550.pdfIn PDF document text
    • http://pune-india.info/userfiles/file/13684943479.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=molar+mass+of+acetic+acid+hc2h3o2PDF link annotation
    • 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_off0000d27a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD27A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ea8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8C 17288 bytes
SHA-256: 38617016b245b2a239d61f68eccba2a4b066a53d8c315636573b1945258d4928
font_02_sfnt_off0001184c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1184C 10924 bytes
SHA-256: 9cb6df3208611286f9d20044ce3bdd6d3bbbf44587fc192f89491d5d0c04a7c7

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