Malicious PDF — malware analysis report

Static analysis result for SHA-256 eedc9d679bcd72e2…

MALICIOUS

PDF

86.5 KB Created: 2021-06-27 00:26:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b8f8b6251630aabf4843de5f7a5a75cb SHA-1: 91ca3dda06b79f64a1262cd9299e87221c4875c0 SHA-256: eedc9d679bcd72e22239d12e8667cf8295adf80cfcee6d0f2de32d8f3bb2a351
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised WordPress sites, indicating a link farm designed to lure users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607794a95a6e0---68512506345.pdf
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160778a89765de---zitebawoj.pdf
    • http://ccsl.asia/files/94860018714.pdf
    • http://ajtoablakcentrum.com/_user/file/54663223376.pdf
    • https://bnbcostaverde.it/userfiles/file/gawezisar.pdf
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160706a62cd8bb---posedowujizomeme.pdf
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/mee1uc6c1g0ucai07jha4t59o7/kizozugod.pdf
    • http://banlinhkienlaptop.com/userfiles/file/31551459858.pdf
    • http://oreade-breche.fr/userfiles/file/33036561158.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/fc0c3f8b60863fbb25e22342f3909a8d/rotuselugubebozigasodidib.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/807ff4b12c8d3e7732503f9e280ccb04/74259688466.pdf
    • https://jmtours.co/aym_image/files/94714439164.pdf
    • http://radio-salsa.com/php/rs/filesupload/file/49854143891.pdf
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab9c689dcb7---44313327093.pdf
    • http://akcjonariusz.com/UserFiles/file/93527834880.pdf
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607400654cf81---46960518080.pdf
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/c01abdf48789708e0446796b0d19cc5e/xiwijifezi.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cca8267b0e---xuxupuwabupusanipixe.pdf
    • http://gtlmarinefuel.com/userfiles/file/gunodaxemafedup.pdf
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/7bbd5b90d32e82fa5fffd79c2382d246/pudimukumoju.pdf
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/965aa0f41c6d4b1a95729b25a8c367e2/gijer.pdf
    • http://onlinemidias.com/ckfinder/userfiles/files/82189699481.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/005dea45c14564939fa3774cee050bfa/tenowogujimeluz.pdf
    • http://bpabv.nl/uploadfiles/file/43150189699.pdf
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c5a8ea9d91---juxinife.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=game+dev+tycoon+starting+guide
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed87.bin
7dfd83c0a988e4ccd06c0a2e55c08f18faa082cc84c4d025e2cbf504f73a0a1d
pdf-font-stream PDF embedded font (sfnt) at offset 0xED87 10988 bytes
font_01_sfnt_off000106e7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x106E7 16792 bytes
font_02_sfnt_off00011ef9.bin
2d3e084e72e1bb9c7dc17724cfc195f1f74e51629c473b57be5292709caaa63c
pdf-font-stream PDF embedded font (sfnt) at offset 0x11EF9 17616 bytes