Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a2d7a6184643a60…

MALICIOUS

PDF

198.7 KB Created: 2021-07-06 06:31:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a4f1f26e8481ff0e7d9624d8c98f1978 SHA-1: 82fa54433db7ea61c6f20bb648b07c917dd1479c SHA-256: 2a2d7a6184643a60ca3aa1bdc38d8721740f4eefad9032d7202bbc80502e7433
126 Risk Score

Malware Insights

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

The file was detected as a phishing trojan by ClamAV and flagged by an ML classifier. Multiple heuristics indicate the PDF contains a link farm pointing to compromised WordPress upload directories, suggesting a phishing or malware distribution attempt. The embedded URLs are likely used to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9604

Heuristics 5

  • 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.
  • 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://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16096f8191aba6---72311233902.pdf
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098b02de2df4---kegokuwikixukorabefap.pdf
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/5jfdumdvk2eovgj2ok8pusj2kk/19393011152.pdf
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dbec14c3382---39984515625.pdf
    • http://tomaszfilipczak.pl/userfiles/file/fanenosixosezapopuninasu.pdf
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/e85e42548ff4acd12f93f76bbcf4688b/ruzozo.pdf
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16072918e67ee0---72070217342.pdf
    • http://podushka.by/files/files/21955790852.pdf
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160cae63fe0dfe---doxevepafepesizabuj.pdf
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608ca44423dea---24117221411.pdf
    • http://myqself.com/upload/files/10471161973.pdf
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/95740376bd79b61ce7950378607f503d/34809297672.pdf
    • http://klasykarozrywki.pl/public/images/fck/file/45014523151.pdf
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/16093a83f36e1a---76671181529.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/efe8c3ee1bdbba238f17fedefc1111a0/danib.pdf
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607b653dec888---pugajena.pdf
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/aa77c85b6a02ba047d88df667a07898e/21275639314.pdf
    • https://ajitcoatings.com/uploads/36673853560.pdf
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/02ba4f1aedf8c0ea4a6dfb7628eab1fd/12499848096.pdf
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/u6dj96pvs9hiu4gar3uq7lreod/76851918975.pdf
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/kgnb1dspke4f5k85hn3q240s07/26630326261.pdf
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bfb95cde6d---93354243610.pdf
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/qoek1fen9n6vdvni9bpc8bld8k/ninupu.pdf
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/73be712409eabaf2d416c054bbae30a9/xebesoxedulebiru.pdf
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9a571677fd---68778992683.pdf
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/7lrhc43r51v82dfq70ec0gseqg/kafofagaxetet.pdf
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/f9oifao90nohvq6vpera546qm5/79221503673.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=crossword+puzzle+on+integers+for+class+7
    • 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_off0002a9ee.bin
91d598431c792ae102bc38e130e639123b43af577c307e3504053d0d5708e27f
pdf-font-stream PDF embedded font (sfnt) at offset 0x2A9EE 11120 bytes
font_01_sfnt_off0002c3f9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x2C3F9 16792 bytes
font_02_sfnt_off0002dc0b.bin
632d5aeba7fa018cf0793ed9b9cae16f05b7bd6c6ecd86daf744e28ec6618c8a
pdf-font-stream PDF embedded font (sfnt) at offset 0x2DC0B 18292 bytes