Malicious PDF — malware analysis report

Static analysis result for SHA-256 748745043d184b34…

MALICIOUS

PDF

72.4 KB Created: 2021-08-28 06:02:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8803092741137a1272bf2a1e23c9147e SHA-1: e38b206efe1e9408f8c946e3e3d57ef77b0a6b6c SHA-256: 748745043d184b34284600746525f1b58a5ed5b5f34b3e45ce1d47a2f31bb01e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous links pointing to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate an attempt to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9915

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://laborke.ru/uplcv?utm_term=first+ever+car PDF link annotation
    • http://pnmanagementsolutions.in/uploads/46016266411.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/o7qrn8vati6mupdkp6a41gasba/19252902723.pdfIn PDF document text
    • https://cartolmania.it/file/relulazepeken.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a785262589e---xozis.pdfIn PDF document text
    • http://osheamaloneynylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kezutisenibozu.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/pifunatumemufe.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/jagoposisonimolotu.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/60872772e82b474c74a8fb0466a81e90/47797037929.pdfIn PDF document text
    • http://qunjl.com/userfiles/files/28532116990.pdfIn PDF document text
    • http://brilliantsolarpaneling.com/userfiles/file/detinemamexusezumisujes.pdfIn PDF document text
    • http://salondebellezaanamariaromero.es//ckfinder/userfiles/files/jifanasegelepopi.pdfIn PDF document text
    • http://castel.lu/userfiles/files/tisuzal.pdfIn PDF document text
    • http://dbjhockeytournament.com/clients/f/f9/f9ff496842c877cbb4522510b668f2a2/File/67905051617.pdfIn PDF document text
    • https://mimpiindah168.com/contents//files/bakilemunojatog.pdfIn PDF document text
    • https://adsbudget.net/userfiles/file/91576399627.pdfIn PDF document text
    • https://grandhotelushba.com/userfiles/file/55944682792.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160704f54bd359---83730613978.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/a35ecc56161540de039d22ede4e78a80/85341215141.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/a09ebb04996ecaca51ea7f26e0f4ebe6/64227179109.pdfIn PDF document text
    • http://xn--80aafmoni2biho.xn--p1ai/admin/ckfinder/userfiles/files/tepiruxepajinuburil.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baa3caeab1f---wafozamib.pdfIn PDF document text
    • http://northcity.rs/slike/files/nulodus.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160df62d37c980---10655377804.pdfIn PDF document text
    • https://glbtrader.com/userfiles/file/5378465806.pdfIn PDF document text
    • http://gartenbaukoeln.de/uploads/files/zilofabipedasakez.pdfIn PDF document text
    • https://toppelletmachine.com/d/files/40167470923.pdfIn PDF document text
    • 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_off0000bb7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB7C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD392 9996 bytes
SHA-256: 0e74bb79aea30ff877837c6573aa6c2eed952a48a6af4b72f99d71e4e82231a8
font_02_sfnt_off0000e9e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E9 16420 bytes
SHA-256: 86cb39f8ce6a12e5df0aa975301dbae6ef367475580b728f3ccdd3513bcba1de

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