Malicious PDF — malware analysis report

Static analysis result for SHA-256 bee6439ed4ed716e…

MALICIOUS

PDF

81.7 KB Created: 2021-09-02 22:14:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2ee1fe3549f4ce7fe9672647c5d6019b SHA-1: 562a8434005ef7e710c33cd91d84aa50a902dbf0 SHA-256: bee6439ed4ed716ef76d64e317d5158f596b580e4cf8b81beb40dff6d1aa70c0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many hosted on compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/5adebebd795b957ad401080f035c3763/85273609027.pdf In PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/c2dd45da4c79bfe29287a1a76d4a85e0/monujeli.pdfIn PDF document text
    • http://dentish.ru/ckfinder/userfiles/files/80708977091.pdfIn PDF document text
    • http://mixmarketing.vn/upload/fck/file/xewujogipub.pdfIn PDF document text
    • https://kermiradiatoriai.lt/images/files/35014013429.pdfIn PDF document text
    • https://bestrecycledautoparts.net/images_i/file/giwifepeb.pdfIn PDF document text
    • http://tokyosushilohaus.com/uploads/files/76131091276.pdfIn PDF document text
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/h1kiejs3rrfo4fcja3cejgd371/58770148481.pdfIn PDF document text
    • http://restauraceeverest.cz/userfiles/file/xalimase.pdfIn PDF document text
    • http://konemara.hu/userfiles/file/nibeligonirulidebegegog.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160755cefbccf0---misutosexegozitikizo.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1607a89f3d9bb1---37713989903.pdfIn PDF document text
    • http://kantoromega.pl/userfiles/file/2136075940.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/0229b74d74b43a634f0f0eba5d2883dd/95298158018.pdfIn PDF document text
    • http://melvin.cz/data/4509659326.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084472911ea7---lepepiwarojep.pdfIn PDF document text
    • http://nhatminhtrading.vn/app/webroot/uploads/files/fonofuwe.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b7f8eb21603---loviw.pdfIn PDF document text
    • https://www.tri-or.fr/tri-or/ckfinder/userfilesfiles/5358968700.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/a8q8q8jffnpddms0t27prokeek/posejumuvutonaxupeseten.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb05e57ca3---vamasekoziloxulak.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/c3fb501dd338df1fb1a771d72091b2cb/62255434569.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16073ae5e88324---73332310091.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/2caa55a77bd2c2db52b31dd90d517bf6/80834199495.pdfIn PDF document text
    • https://esperanzadeavila.com/fotos/file/futuwejogigokotupamuk.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec0de515ae---lafidugisubagatejo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=research+report+pdfPDF 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_off0000d9f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF206 17900 bytes
SHA-256: 7f730797c017a9aab376adcf5b7fad7faad9c1712dfae168b028da824614addc
font_02_sfnt_off000120c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120C7 10520 bytes
SHA-256: a45924dbf62ccf44aabec7cefc6a14dc518fb1062cf199fb3939df585cddc914