Malicious PDF — malware analysis report

Static analysis result for SHA-256 192bd76000e92067…

MALICIOUS

PDF

102.1 KB Created: 2021-06-29 21:23:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cf854563c222efed63fd4649fdf8fbb1 SHA-1: cb621f7b21900c6acbeab2153fcaa53e03e9dc30 SHA-256: 192bd76000e9206779286abce36356a468955780b3e45b3c48ae426265dfddbe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised WordPress sites and disposable hosting, likely serving as a lure for phishing or malware downloads. The presence of embedded JavaScript, though not directly analyzed for specific actions, is often used in PDFs to execute malicious code or redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9358

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://cructi.ru/uplcv?utm_term=analogue+meaning+in+english
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d52ef2b12d---vepizupan.pdf
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae2823fa6c---8342031333.pdf
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1608c626ca0fa1---sitadoxujup.pdf
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/61db7f13a022990c38ec961033e424e8/52731983237.pdf
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160756a6eb5474---99276919839.pdf
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/25bca2ab8f5c85ee243cac680134112e/73158410163.pdf
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/b0556ab59837052a7ed3993777e6e3d8/95849768653.pdf
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/g89uednbo65kkdd4riahh23je3/tebadojesovaduzore.pdf
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/6e109347f523d61d9a2ee904337139de/92256207416.pdf
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a6909bdd359---70638351188.pdf
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/tlluajj3m58h0mvjh8rumjid3n/7735731823.pdf
    • https://motty-etai-sharon.com/files/files/2561386020.pdf
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/d6b70bf37497dcceaa4907ba950d6842/26028270650.pdf
    • http://mackielaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vaxebefufafubexalamiviko.pdf
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/bfe9183daae47c2b57ea95bc6dd8205e/99361531752.pdf
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/07ff1eb7076c185ddbf674e73bf2ffb4/76865937109.pdf
    • http://debandhelder.nl/ckfinder/userfiles/files/deluguxuwarevexokekoxipab.pdf
    • http://cortabellanews.com/userimages/nuzigipodirul.pdf
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16083b5d7e68e1---guvajukiwus.pdf
    • http://phyllisrubensteinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/70057854841.pdf
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9c618b8ce---riderudumibug.pdf
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a4119e16ce8---pomijogamugogumij.pdf
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/2seluc26jdsmhqn6likq5uufp9/jalapares.pdf
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0f0419f9d8---wavuwibofuvonalam.pdf
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0cd124c8f---foxavekurowowa.pdf
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bd9f1fdfd09---sagoxem.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00010b99.bin
d9f5e66163d907df9b2c2f031b8906ab183602eda4757f3e8ef428a9cf922d60		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10B99 18328 bytes
font_00_sfnt_off0000f388.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF388 16792 bytes
font_02_sfnt_off00012936.bin
47c7ee612d37b4a6a9c6d9b3775989a87f0e5555ac9a144f53661646850c99cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12936 24580 bytes
font_03_sfnt_off000164f5.bin
5aeba89e5e2a4f47d4886c66f34335c0af9adeb9f900a4fd1436ef269825abb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x164F5 10440 bytes
font_04_sfnt_off00017c6b.bin
a8161c2f5ba9235eb51b4fcc43b6bb219725019365cb8d38f9ec25dfe5ce54ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17C6B 3464 bytes

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