Malicious PDF — malware analysis report

Static analysis result for SHA-256 69729f8ff71fc3d4…

MALICIOUS

PDF

92.0 KB Created: 2021-07-23 22:29:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 39f36f10d1f4ae7fd956d3934ebac64a SHA-1: a493ae065fb56525d0ca9841e0c11137e810ccde SHA-256: 69729f8ff71fc3d46264073ff35fe90190d4e346fb72952174b97e53f0c55cc2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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://dxqzx.com/ckfinder/userfiles/files/20210630_142511.pdf In PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160873a75efac9---73579761259.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/xuguvub.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/47053486784.pdfIn PDF document text
    • http://tetraeng.it/userfiles/files/fuwiragadem.pdfIn PDF document text
    • http://crmloccitanecr.com/campannas/file/62989535391.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/lv6e82glmpaooa8chm4l5rl5r0/91971592020.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/62a7fc38ee37c1a601c0129cc1db977f/28864433896.pdfIn PDF document text
    • https://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/sekowasajub.pdfIn PDF document text
    • https://thuaphatlaihanoi.net/uploads/files/tomogixigetosiwiruwawo.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/5aee709090cce7598ecbfd572084667f/fovejalevaf.pdfIn PDF document text
    • https://lusagroup.mobi/images/website/user/files/31172938755.pdfIn PDF document text
    • https://totounited.com/contents//files/80712416644.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/16082065d2efff---zalofuwurikumusenu.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/504415eab99cb87ed0b3840a665b621e/99064601479.pdfIn PDF document text
    • http://keyflounge.nl/userfiles/file/pajozejivowego.pdfIn PDF document text
    • https://vieclamkinhdoanh247.com/upload/files/jurimasuxejafakotatod.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/3fmr00e5v5dtgp86n8qgknshcs/jaziwubasasitez.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9542c9be6c---89237833786.pdfIn PDF document text
    • http://rideco.hu/upload/file/93787112243.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/140ae83c99b304974d5818f6ffbc2874/rizodurituruzoted.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baf8a30f321---lexifukakewilowoxupanap.pdfIn PDF document text
    • http://svatba-emi.com/uploads/pages/files/19259483328.pdfIn PDF document text
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/19gn1tpg3vb83gemoatfouodg5/94016662371.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/fifaki.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a61c5f4be16---guvoju.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c79bbb75c4---79206414472.pdfIn PDF document text
    • http://graham1978.com/clients/79565/File/pavizufitok.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=fce+sample+reading+test+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_off00010107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10107 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011919.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11919 18268 bytes
SHA-256: 899d22f3de46490f5366a1733e7c5ed95608046aded1478f89b83e7cd6b44e8f
font_02_sfnt_off00014888.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14888 10820 bytes
SHA-256: ed2d15078f8bf3b0c33c67d572ced6f34b37d9a2a1d010b3aab93f1b0030585f