Malicious PDF — malware analysis report

Static analysis result for SHA-256 131147e8a5c19c13…

MALICIOUS

PDF

85.1 KB Created: 2021-06-29 20:55:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 79bd0f9039d6e737d8b8a2c9ed4bb98b SHA-1: 4fa81760e740d686a4f893859b7e96f9711b33c3 SHA-256: 131147e8a5c19c132fe3f59b92eaf4ad2cbd2e57b11548125f9743877a58d04b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm used for phishing or malware distribution. The presence of PDF-specific heuristics like 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this. No scripts were extracted, but the overall structure and URL patterns are consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://garglob.ru/uplcv?utm_term=ipad+browser+test PDF link annotation
    • https://sitpchemcieszyn.pl/_sitpchem/file/26020708759.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/3fe85eff45456cc1e38adda47b3a3578/81395757035.pdfIn PDF document text
    • http://allnatureint.com/userfiles/file/51790816327.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/700c0512387e6a308f08726bf6bc28d0/tedilemoget.pdfIn PDF document text
    • http://elementsgogreen.com/userfiles/file/93707145215.pdfIn PDF document text
    • https://moto-trend.cz/public/files/fck/file/76866117657.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/419b2719a46d777019b8977d99ea0b45/jewenabim.pdfIn PDF document text
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/d95dedf8ad9fa50b024e86c9bef5d744/42609557213.pdfIn PDF document text
    • http://dyglas.com/userData/board/file/nujafudejokeredolug.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609481935c72f---vakasaximonip.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160bf84447cd0a---23747609900.pdfIn PDF document text
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/nnn83rfe71bs7pj9pa22hqsma6/mowanamenaxewerug.pdfIn PDF document text
    • https://condominiovillage.com/userfiles/file/88535062725.pdfIn PDF document text
    • http://earthtalismanjewelry.com/clients/b/b2/b27d4d76c51cd35ccef873a204118430/File/wumiwijafonejo.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/08b3bb669c65e0825e35874172e38773/72565648319.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/16098408dcf105---27082509809.pdfIn PDF document text
    • http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/xonaxudupuzinokeramun.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/94beddadfd8478175496543cdff8ef78/32034411858.pdfIn PDF document text
    • http://3e-recycling.ru/app/webroot/filesfiles/rosulesibowufopa.pdfIn PDF document text
    • http://roocenter.ru/upload/file/vodalurufunugafopene.pdfIn PDF document text
    • http://i-harmonics.com/upload/files/xijuza.pdfIn PDF document text
    • http://paynechapelduquesne.org/clients/9/9b/9b910c66cef3ae2d1bb1fd5804160a19/File/61497149764.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/90491327929.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/76104718236.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_off0000e916.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE916 10320 bytes
SHA-256: 629398417a300687ad651b8a20796f5fdef87654e92e57df1e909f6c65543969
font_01_sfnt_off0001004f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1004F 18412 bytes
SHA-256: f1152f8960b0c9c5237d9145da0d3c88a45f469602fa8eb806fddfa96297280d
font_02_sfnt_off00012f3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F3F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1