Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fda0dbf54ced8b4…

MALICIOUS

PDF

88.8 KB Created: 2021-07-02 11:57:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 29fd2fba11e455c32ef0c3d92cabd0ac SHA-1: e465724a10446a433865120197c308d8042f100f SHA-256: 0fda0dbf54ced8b409c4c93e626f15810cc863c271b70933910c80ffc909f90d
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to distribute further malicious content or phish users. The presence of multiple distinct hosts and the use of 'utm_term' parameters in some URLs further support the link farm and potential phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://yjccnc.com/upload/files/molozikuvo.pdf
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d889c1baef---42436729248.pdf
    • http://eksan-ltd.com/userfiles/file/kolekakebenefag.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/gp327m7qffbjoljdmp9k2n9a9b/75648907803.pdf
    • http://versobrokers.eu/userfiles/files/sonebudolutugol.pdf
    • https://eatorhours.org/e-bussiness/fckimages/file/32036063764.pdf
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2aad2ccc42---33196531312.pdf
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/58ffb7e9467391988a6a92d86e77717a/siveretaxikirasu.pdf
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/9a058f3426ffa1cbc4e2024d41e46d8d/rizapuvimelozaki.pdf
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/97mp2bqu8b6kgusl2b0pvvn27j/82458971866.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8c3ee5703e---75034651838.pdf
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16096543318833---9736771883.pdf
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/a0f8eff47563a19e2d7b393847509303/5409317690.pdf
    • http://jucal.es/images/file/89127355903.pdf
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/088bcbfa6858816d1eb47682e3b58cc4/77858829307.pdf
    • http://www.pranabkumar.com/fckimages/file/24953427248.pdf
    • http://s-moonlight.com/CKEdit/upload/files/javenewemufozovaxevu.pdf
    • https://jerseyshorepirates.com/userfiles/files/29916325718.pdf
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/b6b3a6b1632a6eab2c2e88871943e760/39146017377.pdf
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/82955702860a90029028e3.pdf
    • http://orgue-chantepie.info/FCKeditor/upload/file/jagekewas.pdf
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607373066fc3e---mowerojotodam.pdf
    • http://www.onlinetemsilci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075caee709c8---37172779355.pdf
    • http://kagoshimakojintaxi.com/userfiles/file/39307901270.pdf
    • http://vinmexindia.com/uploads/fomefaxolajudosebobiwora.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=tin+star+tv+series+review
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa25.bin
4e77eeae7d0fd3413f094c6c189ccc7787d34d4cb6fb6d551f8389904d320a33
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA25 16908 bytes
font_01_sfnt_off000125d7.bin
5d4890bfa35310604133886df67bd14fd6fd502d7a0c16dedb7cfc01902e2780
pdf-font-stream PDF embedded font (sfnt) at offset 0x125D7 10052 bytes
font_02_sfnt_off00013c65.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13C65 16792 bytes