Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c93ba9abe422397…

MALICIOUS

PDF

88.1 KB Created: 2021-06-29 11:49:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 196a2b6ebcf851f71e4d58c13a65fe6c SHA-1: eaf50efe2c7cdbdef46d1adf1723cd4f51f1b9ff SHA-256: 1c93ba9abe42239787a75615f23041fe211aa8661ebbbf3fe9cc1898afbef7a8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, suggesting a phishing or malware distribution attempt. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classifier flagging further supports malicious intent. While no scripts were directly extracted, the structure and URL patterns are indicative of a phishing lure, likely intended to trick users into downloading a malicious payload disguised as a game.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaf6c108ef7---40216614861.pdf
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c64d635b8ba---85603587569.pdf
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/b4f071e88f31c138a60c604dfbfc69cc/82278085377.pdf
    • http://titadoorbinhduong.com/upload/files/bazowukedus.pdf
    • http://iaestedresden.de/userfiles/file/39606967071.pdf
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606fe177764ea---26992074226.pdf
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/6ea296a1acac5c2cad10db3ed69099bb/66832199976.pdf
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073aba069162---99491230720.pdf
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/491a126f8c3b5065f0d7656f5e46bbfe/diraxixavu.pdf
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b01c39022e8---gagajikekivupow.pdf
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/b4d9c500858f7308043d17137e19ef8a/54999584344.pdf
    • http://cgpreceptor.com/ckfinder/userfiles/files/rasofa.pdf
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/760vifsd61k4jc4p3b6re1gtob/10620929052.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baa0ed67366---82149927906.pdf
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/729c9af1fbf9c336ea670162e872e697/sinikamigurubuwapabu.pdf
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/617dd5c34ad652b17bf95d59324be3c8/bawirugitinusor.pdf
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae533a7a74a---52438961200.pdf
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608a1f43206ca---85432598839.pdf
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c207a244ea1---78207953377.pdf
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/5929de1078aab46642e9a97d1f1f3229/64710063065.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/7ba3efacacd0f3899ecaa0a19aea25ab/nilemef.pdf
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/b98ovhj2lhm4bkieh477lfl474/zoxefukagotopesizafexuxe.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=gta+vice+city+download+for+windows+7+free+download+full+version
    • 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_off0000f514.bin
72bc935ca21e09352b92a8b4e28ddcb8e2c9c8c1e3ff2973db10f8c434cd6911
pdf-font-stream PDF embedded font (sfnt) at offset 0xF514 16920 bytes
font_01_sfnt_off00012102.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12102 16792 bytes
font_02_sfnt_off00013919.bin
2482b9e9a033439c128f8a45df9b590b0cef8f012c15e873a963ff7e8ce856d3
pdf-font-stream PDF embedded font (sfnt) at offset 0x13919 10924 bytes