Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6071fefdb48feb5…

MALICIOUS

PDF

84.6 KB Created: 2021-07-04 03:52:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3a80a2223260c341228af2918984201a SHA-1: f4975c3e60600c495fe501a2ebcffbacb69b3088 SHA-256: a6071fefdb48feb5f60b611447a59cb6e0f47d713ab33c03a54745cafd2ef310
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites. These links are likely intended to redirect users to malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://synerhu.ru/uplcv?utm_term=foetus+is+the
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/pvpitvudltumkra72lc6jbki5j/fajabefaj.pdf
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/e37ba442b52f2b518095d87916196e66/18943557965.pdf
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/ogj13ib9mpqp5lja92tca7i3kr/falopodenekob.pdf
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/dlq464hc7dvm0pnoipod5dtn45/numazebilifufolaxefolemuv.pdf
    • http://www.allatpatikapecs.hu/images/file/27939962507.pdf
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/50f38a98cde3188faba9e59d6d377365/79645431132.pdf
    • https://advantagelic.com/singhania/downloads/file/zuladadatagiwazinupa.pdf
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/87562010e2ecad3b60a76f2db644c814/64926941435.pdf
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/ksu27u47dfb6366nklp5200duf/luzofiterirajizodubefe.pdf
    • http://www.allatpatikapecs.hu/images/file/97022465403.pdf
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c44cca69bd6---pinesirurozedomarem.pdf
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b6a5d791800---6352233830.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/e74kgc5u8rnhmgau67nvd2tnb5/69563226774.pdf
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607a2d8e90d15---davikerogororosexapi.pdf
    • http://bayzones.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/jamigifil.pdf
    • http://jyjwqj.com/uploadfile/file///2021061518142667.pdf
    • https://ckmusicdesign.nl/userfiles/file/duvofisad.pdf
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16084d42faad9b---datesotiwutiwukubilewop.pdf
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/8c6c0600e27b38a4ac3c9c269182d47b/gorojajurefiseduwok.pdf
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606cdddb57f62---setutetilofi.pdf
    • https://spacio.hk/attachment/file/bivukumurugerusetexat.pdf
    • https://nucamsa.es/userfiles/files/vinurezelazunenibedideriz.pdf
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/58ce8d562e0be9dc3070b5434f3b5d57/zegitefibuk.pdf
    • http://www.dramayaramendes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16073d49603c5c---42909030939.pdf
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbd08e9ab79---22341970002.pdf
    • 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_off0000ed5c.bin
abb0c52f62d9df987d8e4ff02eea5fb1700ae7dfe93d67a82f4b28d7731f1755		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED5C 16508 bytes
font_01_sfnt_off00011799.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11799 16792 bytes
font_02_sfnt_off00012faf.bin
20cc27f535b84659f64596fcfe78f3b8f92aad5fb128c28f349dd4b8a914ca35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12FAF 9872 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.