Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ec75ebc9c87ad45…

MALICIOUS

PDF

92.9 KB Created: 2021-09-04 04:04:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e66f511324635ef3eb28d2918bec1a1f SHA-1: bd95fe0c4cbd78ff3a81ce0075a5cbf2568840fc SHA-256: 5ec75ebc9c87ad458d53ad283d67395e29c3d760f4791468741a1dd6ba1b9572
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://nomylo.ru/uplcv?utm_term=trend+hinge+jig+manual
    • http://sushigonewildtogo.com/uploads/files/fosarufemudakunuxotu.pdf
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/c269b8274d8d6edd8957812f0b642c23/93063944387.pdf
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/3030c426ec2a50da5b7e6955fc289826/75094066061.pdf
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160ad30aadc6d2---19506112494.pdf
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/4dbf7c8ef2b5d10ee0ea0b3ba350da79/muzagotijevujetapidipog.pdf
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/16084226058953---48216903574.pdf
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b6545f6accc---voriwesegusegajukemalowi.pdf
    • https://altonika.pro/files/fck/file/rixidigusibi.pdf
    • http://sys-svinding.dk/userfiles/file/wopevavojazude.pdf
    • https://akbaturgame.com/calisma2/files/uploads/54775244333.pdf
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/f9f28km3eg2vc1o4lahbht46i1/97021986227.pdf
    • https://bisnismedsos.com/userfiles/file/gefun.pdf
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16108d87993a23---16570734574.pdf
    • http://www.dramayaramendes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2398867de---83821074057.pdf
    • https://careersourceokaloosawalton.com/files/public/19415440467.pdf
    • https://www.bevillelecomte.com/ckfinder/userfiles/files/37074670151.pdf
    • http://longhornrings.com/clients/0/08/08da48574b41509ac7bedcf2500dc652/File/mukuzufuzuzuwusoxi.pdf
    • https://pypconsultores.mx/userfiles/file/69705579822.pdf
    • https://markeishahall.com/wp-content/plugins/super-forms/uploads/php/files/d0aeb3bc50d912ce58e3c4c9dc49c3c7/97411165889.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/qkmj3k0aomt6gi8o81b58c4m74/33041920447.pdf
    • https://hohsingfiber.com/ufiles/files/rujuti.pdf
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/314ec8eb32488efd999d30f87611656d/34975905453.pdf
    • http://vipnjl.com/userfiles/files/26448370977.pdf
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/161185bb17bc3f---23131336301.pdf
    • http://chikatere.com/Upload/files/figufoseb.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_off00010566.bin
b57041f263207d0497a21be37ad8aeb62f8f1e40c984462aeba9449196f08404
pdf-font-stream PDF embedded font (sfnt) at offset 0x10566 10500 bytes
font_01_sfnt_off00011cb1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CB1 16792 bytes
font_02_sfnt_off000134c3.bin
ec56c702b96cedfed6f5d3ea9e78473f94b4c614fcc8d4c32622d65e1765ad0d
pdf-font-stream PDF embedded font (sfnt) at offset 0x134C3 19052 bytes