Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c6c07beafa60a8c…

MALICIOUS

PDF

84.6 KB Created: 2021-07-19 03:27:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2088c9927b10fb371fd1a34dbf5f0a07 SHA-1: d43281ac6e2e445859bf80f643fa315c41b6206f SHA-256: 7c6c07beafa60a8cdfe9fbd97abdcc4d1aa0ed393607abb8b567e8910ee14c90
204 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple URLs pointing to compromised WordPress sites, suggesting it's part of a phishing or malware distribution scheme. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document's content is designed to prompt the user to install something, a common social engineering technique. ClamAV also detected this file as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/dvtjqb7v5m5sdlsc5bmgb25bm2/99651537407.pdf
    • http://tpdw.pl/userfiles/file/movaselaxagidafizizukuvuw.pdf
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/e0e32d90eacedc88eee609ca7aef72ff/bopetinekeg.pdf
    • http://aprendanow.com/wp-content/plugins/super-forms/uploads/php/files/b142452ab1748806b4c0c0cf00d0803e/levutam.pdf
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a19cae7eb9a---fewerepalenozepafake.pdf
    • https://daxitrip.com/basefile/daxitripcom/files/virezarezito.pdf
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/ofco7khiu326156ju281uugcu4/nupaxufinife.pdf
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b0b47fdcb06---64353716927.pdf
    • http://canxetaidientu.com/images/file/zowemi.pdf
    • http://uniquestatues.com/clients/9/91/91c6e204ee4529d3b478b0717040545d/File/7103179094.pdf
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c389b3f167---21763840745.pdf
    • https://madopin.com/calisma2/files/uploads/diloxopolokevewaw.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/7k035bsrc340c7nct98qfqgln4/49759432178.pdf
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160bdeb283cfbb---gelejuf.pdf
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609880222dc79---7783653014.pdf
    • http://nessium.fr/userfiles/file/podimibugutimubaruse.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/1jp6tb3qp0fqkj586rm854hub7/53453996147.pdf
    • http://galettedesrois.hu/userfiles/file/40612224428.pdf
    • http://exosportsante.fr/ckfinder/userfiles/files/95909801763.pdf
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/30819158de4ba468efa31e9cdee4e6d5/3338169151.pdf
    • http://clinicaveterinariamontecchia.com/userfiles/files/61491156249.pdf
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c456334f181---bekevos.pdf
    • http://musclecar-taps.com/js/upload/files/30465782586.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=those+meaning+in+tagalog
    • 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_off0000e958.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE958 16792 bytes
font_01_sfnt_off0001016a.bin
acd69a4465f15eb63546f16d566c4a3f30f3f0c4373d5d67fca7b1fedca57905
pdf-font-stream PDF embedded font (sfnt) at offset 0x1016A 17068 bytes
font_02_sfnt_off00012dc1.bin
2aa901d14cc2e8bc99803dbfd236615e3f301ff56d384f39ddc79c2192f468b9
pdf-font-stream PDF embedded font (sfnt) at offset 0x12DC1 10420 bytes