Malicious PDF — malware analysis report

Static analysis result for SHA-256 af1e2ebe98ebd6ad…

MALICIOUS

PDF

85.5 KB Created: 2021-06-29 22:49:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 29507e714bd3f8fd90b29f1ef4729453 SHA-1: 96370e45155bfb9c900f07cef3358afd07687f4f SHA-256: af1e2ebe98ebd6adac82acb78a5db616c70acb6cb1200bae2dc3fbea186fbb0b
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing to multiple websites, with several hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of numerous external links, many pointing to potentially compromised sites, supports the classification as a malicious link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://rolmech-strzelno.pl/Upload/file/78786501746.pdf In PDF document text
    • http://traiteur-ribot.fr/userfiles/file/lejerexotoj.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/07670699fe963b2aba81b76849768d1e/37528704688.pdfIn PDF document text
    • http://pokewaveanaheim.com/uploads/files/xapoguno.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/fb2mdq76c291tf0fcqo2v5jdu2/xalakuveguba.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/af04a509a780a629f8d43de159ace795/lixuborerurana.pdfIn PDF document text
    • https://dodomacnosti.net/data/file/mavowotijogagi.pdfIn PDF document text
    • http://sskj.pl/userfiles/file/24540721865.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160758f8e0b3dd---totuwi.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096ce4a417d7---91826169053.pdfIn PDF document text
    • https://absolut-fit-and-dance.de/wp-content/plugins/super-forms/uploads/php/files/d091oc8a18abs9nrp43kis4vmv/regukokapoxug.pdfIn PDF document text
    • http://originalcheck.it/public/img_admin/file///mowikaduzetof.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c611c00763a---45347366698.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606ec7b82b916---33303237768.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/38900053807.pdfIn PDF document text
    • https://media-get.ru/userfiles/files/sozojapivemitepakes.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608036f024117---bokisowegajozubode.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/16080d2599663d---pizumajulowomesedujelav.pdfIn PDF document text
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/178c8202bf523b911a9341d8ab35c469/zadogakipu.pdfIn PDF document text
    • http://bukharaatlanta.com/sites/default/files/file/27071156844.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/vaduwelufixalabizo.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3634d96bc---36979728647.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=in+my+perspectivePDF 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_off0000ed5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED5F 17204 bytes
SHA-256: 1679fae02e44b2381721b57d7f4d52d9ee290df591383eabb39d61779d1b0171
font_01_sfnt_off000119c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119C8 10340 bytes
SHA-256: 6b8e7aa9e8b0926feae25133d17b1bc95bc3bf5869de269e06756274f606faa3
font_02_sfnt_off00013119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13119 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.