Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2204a7d7856ae76…

MALICIOUS

PDF

75.1 KB Created: 2021-09-05 18:58:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 006cc59de8927bfe9948a25db79b7129 SHA-1: f6e3c1df3e198672e3b36924e18f8d8c35e54e75 SHA-256: f2204a7d7856ae76c242acd6f091236114255be4e0d6d0e3b729748b1542595e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external links, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the PDF structure and embedded URLs are sufficient to infer a malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://mystruggle.uk/indigo/ckfinder/userfiles/files/gavifezanopazemulikenip.pdf In PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160d957cd35bfb---40432919049.pdfIn PDF document text
    • https://cavalier-hundezucht.ch/userfiles/file/35215647058.pdfIn PDF document text
    • http://xhiehchin.com/Xhieh_News/_file/51579307729.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/nn194lkujl6rht72rdm22a7n81/20196557042.pdfIn PDF document text
    • http://actlogistic.vn/upload/editor/files/49162275041.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/rclrbfepbm3ms6leteajurn0k1/jumurojenulapivo.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/81892609010.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa40236f19a---xijezabatiwuwokazimovaze.pdfIn PDF document text
    • http://cgpreceptor.com/ckfinder/userfiles/files/7428707350.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16078c69848e2c---woxaxejasutatimuluzuvide.pdfIn PDF document text
    • http://thebrownsfamilyreunion2008.com/clients/81208/File/72379152362.pdfIn PDF document text
    • https://cevhertemizlik.com/userfiles/files/xeziw.pdfIn PDF document text
    • http://xn--om2b25zm6igqb.com/ckupload/files/50002606799.pdfIn PDF document text
    • https://bustotoronto.com/userfiles/file/34451154261.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c87c29d390---ponolamomanefox.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a482c914aa9---2039681767.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/202151377416103.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607912a6e60fd---worumajodemoperufuzu.pdfIn PDF document text
    • http://picart-personal.pl/fckupload/upload/file/rararifugiwulomaxijofi.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/23b807jac5ha9psl0opu7m9er9/tixexajozakewikixewilojuj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=ap+ministers+list+2019+ysrcp+telugu+pdf+downloadPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bdb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDB4 11704 bytes
SHA-256: 8f1e4e30c807f3453b0a9b04e3b1bcec097b687ba2057c6e805ffab300a69369
font_01_sfnt_off0000d999.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD999 16760 bytes
SHA-256: 860a67e586ab147400273644349b9794cdf73117fa1779a921810ac653abe2ad
font_02_sfnt_off000104a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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