Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c861d60a6b9f50b…

MALICIOUS

PDF

97.5 KB Created: 2021-07-29 15:10:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: eb235306c5b547bd61d209cc19c43ccb SHA-1: d796a20f5073b2a51d2cae36c3f0ddef1b32ecd1 SHA-256: 6c861d60a6b9f50b15dfee45c1c8cbbc566d9dc089d0ac7e42f95333bcb5551b
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as a malicious PDF by ClamAV and an ML classifier. A high-confidence heuristic indicates the document attempts to trick the user into executing commands by copying and pasting content into a shell. Several URLs point to compromised WordPress sites, suggesting a potential download or redirection mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/c252997f87b3812e4baa08dc162e425e/68566238275.pdf In PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf3c54756f8---tesavikuxi.pdfIn PDF document text
    • https://institut-arabe.org/ckfinder/userfiles/files/11692635006.pdfIn PDF document text
    • https://mzr-avocats.com/buddha/ckfinder/userfiles/files/nagawikazakarazov.pdfIn PDF document text
    • http://www.biotanika.pl/upload/file/xabuledopebete.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cae8618cc4---73700955792.pdfIn PDF document text
    • https://taichielite.com/louis/taichi/ckfinder/userfiles/files/88401004626.pdfIn PDF document text
    • http://dptour.net/bot/ckfinder/uf/files/bowura.pdfIn PDF document text
    • https://vegan-eshop.cz/data/file/tuzexazowenevab.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/br2jnic5qfrm4f361r8trmlprr/81556807834.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cec71eba9fd---27076102395.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/66419e4732e356adee248f5a80c50407/turaz.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/2g7p7k1djrau49os60hka7g3qt/luxeko.pdfIn PDF document text
    • http://rana-international.com/userfiles/files/popavojopidit.pdfIn PDF document text
    • http://abbwingslynnhaven.com/uploads/files/jogugokudedena.pdfIn PDF document text
    • https://isleo.com/i_photos/file/64884923399.pdfIn PDF document text
    • http://solemarservizi.it/userfiles/files/fajobirikokixojo.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/kizopumisowemuvebituke.pdfIn PDF document text
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/m8pl176g7ohbadsd0rqn04iu15/bolijaxisixakezitoxomir.pdfIn PDF document text
    • http://lev-steklo.ru/userfiles/file/luvitasemelesixi.pdfIn PDF document text
    • http://johnsonsdynastyincfamilyassociation.com/clients/10108/File/lukinumorex.pdfIn PDF document text
    • http://bonapartefamilynetwork.com/clients/7/7d/7d081654635712149502d88e72c54c2d/File/xesazarajutifonobenafaze.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/160ccdb4b51fc4---70325026191.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/4708c8207553ba7acb3683543508e5b4/juzafifi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=how+to+put+a+voice+changer+on+discord+mobilePDF 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_off00011377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11377 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012b89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B89 19372 bytes
SHA-256: 5badf2dc5919ba69e6c8d2bf9a1c8aa0148cf88f0bf42bdf1f16eaa9b30db018
font_02_sfnt_off00015d41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D41 11344 bytes
SHA-256: 15c549b02f799c81682bb6e1b02d6c3a0b63d8b1bdd8f846c771aab84369935d