Malicious PDF — malware analysis report

Static analysis result for SHA-256 223ca9901475b0ee…

MALICIOUS

PDF

86.0 KB Created: 2021-06-26 18:57:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: da3a92f9a083451d196c30ec2b31b8cd SHA-1: da34567a25adb9b5dfd5c4dff2c4d9ba30a987e5 SHA-256: 223ca9901475b0eebb1633396043a923566a238cf9794ac51586096ee0c444d7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting it functions as a link farm to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics strongly suggest an attempt to lure users to external, potentially harmful, websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://irlanc.ru/uplcv?utm_term=common+law+system+pdf
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078e900f2a38---zesefagarovevutatovavad.pdf
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607c953231c9a---fajamivufugoxopuso.pdf
    • http://coimbrasoftware.hu/images/uploads/files/fisewadum.pdf
    • http://www.hangmandigital.com/files/file/47595052198.pdf
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/ff7541f395b32ab04bee2af84bfc2df4/39502003149.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/be0724f8206082e309b3c021256d24ec/66225651170.pdf
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/mi63itnfch3laafdt5ooi3i9ke/voxumupizameguxeze.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2286bbed42---99465953043.pdf
    • http://www.yoko-ono.be/images/userfiles/file/jided.pdf
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/8489b2e3372105afb802abe97a1015aa/80543767855.pdf
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160b48d5099370---nixuw.pdf
    • https://businesslife.com/content/file/fajetadenoniwugi.pdf
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bd33517dba0---lerexaretek.pdf
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16073ee537d7a1---zivininokesidi.pdf
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba80d053c7---50650721103.pdf
    • http://bagiez.com/userfiles/file/22243798334.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c45a379056e---wizuniw.pdf
    • http://martonelektro.hu/files/file/24756368487.pdf
    • http://pomocnaukowa.net/Upload/file/48828274012.pdf
    • http://alnadaoil.com/userfiles/file/50798032215.pdf
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089be9c0d937---70690937624.pdf
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095bd8a26c43---dewifevisutafotas.pdf
    • http://verynailscm.com/user_img/file/78926699730.pdf
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b0c8e45b996---74740711340.pdf
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/34b80fdd39990c0b39c97f1aff7307ea/gebutesavetigu.pdf
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1607c8dccd3123---52371920380.pdf
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/dcd2dca7d3b631f5d2c913f2d13d002b/jujiroganineratenafid.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_off0000ed2b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED2B 16792 bytes
font_01_sfnt_off00010542.bin
43cb3917d4ba12eed7866779f52efc6990a57c8ff06b434ee84abcba2ed0ed31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10542 10700 bytes
font_02_sfnt_off00011de9.bin
6e848fc69bd916e00f4cdea0f9fb787e029a84b8fbdd5bba2eccb04a606f6d4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DE9 17340 bytes

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