Malicious PDF — malware analysis report

Static analysis result for SHA-256 92d9763a72ef6faf…

MALICIOUS

PDF

82.6 KB Created: 2021-07-01 16:10:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a94b76db4a62eef97dd1775bcdcca3b9 SHA-1: bb5e37e390d6d4155230351efe848eec2b40b8fb SHA-256: 92d9763a72ef6faf740ec699815192f1b1b33173bf7eb35c8028026ce6be98d8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these compromised hosts. No scripts were extracted, but the structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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://archism.ru/uplcv?utm_term=pen+and+ink+idiom+meaning
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609acfe216ad6---87990080898.pdf
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607ebf7f6830f---rutesojiluxutekopokoxo.pdf
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfb26629ed8---89769490505.pdf
    • http://maduraigarlandshop.com/userfiles/file/51012289516.pdf
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/3bulpbn3gr7rqpcvqukkj3sf74/zexon.pdf
    • http://calisnt.com/uploads/files/12339529936.pdf
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/7bf05bd1f5e024c82561ba0526ac00ce/90446130615.pdf
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/65d4c06518678d386b23dc08d8b4dc77/33275502683.pdf
    • http://bangkoksolarpower.com/syner_upload/images/files/57743349452.pdf
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd900545d3---fekapurokipudedalopoka.pdf
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/160788b6c84c42---86179631573.pdf
    • http://fitnessklub-impuls.pl/uploads/assets/file/petarevurakokem.pdf
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/5eb3e5150f59524ec541035b2bc1ac36/worosomibejaguvitalim.pdf
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/e58819cfda679a3b634160a33c69b5f8/40092681769.pdf
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dab92c0d44---luzifuwemezenolun.pdf
    • http://intertexmedical.com/userfiles/files/saboxukiwe.pdf
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a8dff64d4f---tasurisilotubagigoluxa.pdf
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abfa92b778d---vakika.pdf
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/4dd7a8057be18cdc0af6752f49284852/muzelajemagufotivanik.pdf
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/4e68998328a8543c2c5751aae2939da4/fipipiga.pdf
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a27e97954bd---95630988095.pdf
    • https://ludifrance.fr/userfiles/file/7551334814.pdf
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608e5e137b1cf---nubitapopud.pdf
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082ddf7dd7d5---7448449221.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000f419.bin
ae2e108f72d9e71c0c5d03474ee27a57c48bccb4b684a8013eeb6a7074a00598		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF419 17188 bytes
font_00_sfnt_off0000c795.bin
5c0b9a0979778fbd619b32805dc00e34a61d0bafbba97f06c6dd284533425642		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC795 17400 bytes
font_02_sfnt_off00010d9b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D9B 16792 bytes
font_03_sfnt_off000125b2.bin
471120ee4adf8e947bf2b0d0e0804dee3e5911766f6ada6b1b89b5c139bd53ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x125B2 10272 bytes

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