Malicious PDF — malware analysis report

Static analysis result for SHA-256 926369296654c570…

MALICIOUS

PDF

79.6 KB Created: 2021-08-30 12:30:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 34249c0a01f63a3603d57cef9bca9aae SHA-1: 2322069a644469c12819c1ec6bca737221e759a5 SHA-256: 926369296654c570895adb8b0ddb823c0864487d861cd3d4473cbc1b0da2df33
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm directing users to multiple external URLs, several of which are hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL targets suggest a common tactic for luring users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://capecoralliving.com/media/file/filiso.pdf
    • http://mofrantech.com/userfiles/file/36650672631.pdf
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a217f7a5e85---nigebasatogupofoxifevi.pdf
    • http://glassick.com/userfiles/file/tilagofururutusarunefi.pdf
    • http://surausa.com/uploads/files/rumusilaguwaseleweg.pdf
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fc44134585---wepozopalefetuvobusi.pdf
    • http://davisfolk.net/clients/1/1f/1f1070e31f35868a9a13f38ee7dc887f/File/sumuzok.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16070eb3f534af---59089697565.pdf
    • http://hindel-relax.ch/ckfinder/userfiles/files/podugudimewuri.pdf
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b0988b09050---37123451601.pdf
    • http://portableandcool.com/files/files/jevebodixuruwikifa.pdf
    • http://alvirne88.com/clients/71477/File/67673426231.pdf
    • http://montazerangroup.com/uploader/file/defalovapakolujutifel.pdf
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fb3a6a213e7---zazekavigozojugebevoze.pdf
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/hrf4rcs7h6in8t7dq2nqg7li85/33167234145.pdf
    • https://cobaltinc.org/userfiles/file/sojajeta.pdf
    • https://kingyao.com/uploadfiles/files/20210630_162836_1105.pdf
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/179b73a7698ffa37a81b8595071286c5/20681661232.pdf
    • https://energiadirect.pl/application/resources/ckfinder/userfiles/files/kenataforoxota.pdf
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf04ce8fe49---95272526489.pdf
    • https://treasurehunterdetectors.com/ckfinder/userfiles/files/36078063593.pdf
    • http://puginternational.com/ckfinder/userfiles/files/53007700232.pdf
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/d6acd2e8b1e748c6c0001043d759ab3f/karaluwowodunipe.pdf
    • https://prokoncept.hu/admin/blogfck/image/file/90968773931.pdf
    • https://caror.hu/ckfinder/userfiles/files/17989342855.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=free+pdf+creation+software
    • 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_off0000d1c0.bin
40680345624e9772726d869bbb814904343c493dbb94700a0773dccce89c1465
pdf-font-stream PDF embedded font (sfnt) at offset 0xD1C0 10632 bytes
font_01_sfnt_off0000ea3b.bin
0627652def110d841dc3388aa1f1485f0e89ed43f8053f200ab2403e1fde769d
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA3B 17764 bytes
font_02_sfnt_off00011858.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11858 16792 bytes