Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eed25c9729665e6…

MALICIOUS

PDF

81.2 KB Created: 2021-06-27 22:56:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b900e7912ce0c7f8a53266956576de13 SHA-1: f0cc37d7bf57f51de269e711888524f2d3411637 SHA-256: 9eed25c9729665e6e9025c6d1de43a5f159648fe5031a8d49f5ac0928f31abd0
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload directories, indicating a link farm designed to redirect users to malicious sites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the presence of multiple compromised hosting links is a high-priority indicator.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/i93qtrsvfm1va83183c1b7lvig/31976967643.pdf
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160824cdad53c2---tuvigogazalom.pdf
    • http://bluekeydigital.com/images/pic/file/bamixuzuxakip.pdf
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160891d444a125---98445374079.pdf
    • http://architettoseneca.com/userfiles/files/jeduvovunufogafijad.pdf
    • https://cosplay-expo.it/ckfinder/userfiles/files/61053740232.pdf
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/86270b176a5fb1998a532ccdb1ef5ebf/watuliraxizopopezu.pdf
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1bcfcb7f60---41030436247.pdf
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160cc343db0bb6---60768601900.pdf
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/cd055687adca37e564a546a55c610850/48727691281.pdf
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/0de3c4232c9e2e5a00bccfa565f01a3e/83320143962.pdf
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1608508f26b52f---40198738160.pdf
    • https://a2designbg.com/userfiles/file/ribomaje.pdf
    • http://servmed.net/userfiles/file/72085681099.pdf
    • http://humanitool.ru/userfiles/file/kovumejumuse.pdf
    • https://bda.ch/ckfinder/userfiles/files/sesajuwarom.pdf
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ab969068584---87115049370.pdf
    • https://tidaksusah.com/contents//files/32297790032.pdf
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/3llf6iiqeugj6b3bvln5u8vi27/25961000343.pdf
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bfaf654d9f---lolopogaduzeker.pdf
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/epkbveaugo51gunloc7dhsurn1/gijuwavegejabafebiwubi.pdf
    • https://oklasik.com/ckfinder/userfiles/files/jujupalifufefojuv.pdf
    • http://cukierniabrzezinski.pl/www/artizam/fck/file/42204957656.pdf
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/c5ed257b5d187f18f6697b7dd99f9585/98075722696.pdf
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2bebfc8205---dariwegugeraxu.pdf
    • https://www.lashharmony.co.uk/wp-content/plugins/super-forms/uploads/php/files/09024milm6moni6r1fqk8a3mi9/kakijagubi.pdf
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/69f18664e7e9a929e7b69f6298f07442/rowogegi.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=the+boathouse+canton
    • 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_off0000db90.bin
4baf92557411bec298766e0b248b2783f8f26b861948615508dc62809d040979		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB90 17148 bytes
font_01_sfnt_off0001086a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1086A 16792 bytes
font_02_sfnt_off00012081.bin
5afdce2a5b1f4a3ab4d0786e7d84a41c62f425ecd94b8b755afaa11a85f6363d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12081 10292 bytes

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