Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1203fee8381182c…

MALICIOUS

PDF

65.3 KB Created: 2021-05-28 21:29:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5af60db79ce2be15e78c237402142eca SHA-1: 1a5e7880e8c46597f357f5e348042372f955ac8d SHA-256: d1203fee8381182c7e520590ac3fa6b68a310be6ac9a1da4fc81ea2c17ed998f
154 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating it is a link farm pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the document body's content and the presence of numerous URLs, some hosted on compromised sites, point towards a phishing lure for a game activation code, likely leading to malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 5

  • 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
  • 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://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/sbmbilhu6ha8io8h3ustkhp843/nejesunovutamob.pdf
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/4ca01983c1f31bff5c1f86eaeac3aedc/49564278836.pdf
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/4d211dd5d6f24deaf746f0d91f86b192/pumememipunuvapos.pdf
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/160823ccace193---24522312803.pdf
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/lrr4ncfp697cpoa7lhv7mi3nu5/rapalorunuviwabokirixiga.pdf
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609f934c67269---23254260850.pdf
    • http://aldo-ins.com/userfiles/file/50440070685.pdf
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/amaihf8taiqbi077aupgte5ak0/66284246693.pdf
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/16074934ee5ca9---wejipejonakozufuluzunefez.pdf
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/81a6bk22u7aa3u0skgcel6ch10/busaxuzafe.pdf
    • http://johncarroll1967.com/clients/1/18/1896e795ecc2602204d707ec4e69586f/File/retogojij.pdf
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/ea8a2b8e7fac27b31ddcf6c6696b1152/nevajefopovun.pdf
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160864c0c626f8---53885454209.pdf
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/6cravam1g2nd3mliusc71a720g/65792959749.pdf
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084bc8413570---1985772653.pdf
    • http://dzbnf.com/upload/file/%5C/12553435102.pdf
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/683ffdf1c26da64033d61ed85cdc9d01/80220413994.pdf
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cc3d83038a---nanode.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=code+d%2527activation+rockstar+gta+5+pc+gratuit
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e618.bin
baf1e276bdefbbac2c6425aa9aeef05b89e4fd6fada67d6dc8c08a3c7129e54b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE618 5396 bytes

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