Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2c179cb447f1500…

MALICIOUS

PDF

87.7 KB Created: 2021-06-26 19:51:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fcaad9affd3cea8bf163bcec594714a1 SHA-1: 43fc38968f9e51cdbfbca144ac1ccd6f07fb9739 SHA-256: e2c179cb447f1500bd92d4d63d7b27dfd7a20551af48e8732dc83ce963f98bdf
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The document body is heavily obfuscated and unreadable, providing no direct user-facing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160a9102dbb8aa---94752580666.pdf
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/663ea9a8fa463abefc8c873a675867f7/17716127704.pdf
    • https://sammycar.ch/sammy/sites/default/sammyfiles/newsletterfile/57659439103.pdf
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608b03056dff5---jamarewukawasivuvix.pdf
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/16072045e4f28a---15082687817.pdf
    • http://fashioneducation.ru/userfiles/file/47286530298.pdf
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/5esmbd7jplhhlktup764s0q0hg/82956349681.pdf
    • http://emurus.jp/userfiles/file/zibozikovidaw.pdf
    • https://clifestyle.net/uploades/userfiles/file/gitabedigapebewutez.pdf
    • http://birnagarcollege.in/userfiles/file/dixovuregijisogivege.pdf
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/67v066o9fp921ob1hs3r43mdgh/37347916924.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160988ae76fa1a---valejafalewiwalosuzasusot.pdf
    • https://nnt52.ru/userfiles/file/favitetelirabaxefisujajez.pdf
    • http://iccj.jp/images/uploads/fckeditor/file/tiwabuposuwikapupezid.pdf
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/18c789dc41fc8a24f13b5d408a6d2f10/91526773971.pdf
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/b7580a93e85a3e8bc9bcdf4938bff9b3/7458934617.pdf
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a676415eb8c---85957374813.pdf
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fae627ca02---38248671779.pdf
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609a2fdfc7d39---54607497183.pdf
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/d937f4293672208f2118aa651d38bf05/regezagexo.pdf
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608c2c1ec8d4a---titagokixarivewoxexada.pdf
    • https://tkquiz.com/userfiles/file/wosadekarenaxo.pdf
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/3b5024eabcfe8f5d4eba8cec99d9ba0b/dikupuzirap.pdf
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2e27931db---mokejos.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=my+heart+will+go+on+song+download+mp4
    • 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_off0000f208.bin
3505f973d2a0c5e7a7fc4a221defad26105076f4290639ca0e667caf3dd068aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF208 11112 bytes
font_01_sfnt_off00010ba9.bin
e579cc7db17c9a63b082fe29cee8ec8e6b38b997dbe3f5cd6db126c36e130d57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA9 17676 bytes
font_02_sfnt_off000139a3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x139A3 16792 bytes

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