Malicious PDF — malware analysis report

Static analysis result for SHA-256 e61ffa3a9b98d9db…

MALICIOUS

PDF

70.9 KB Created: 2021-04-29 13:45:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ab669bcd479cec86bb2416e6385df1a SHA-1: 87961f9dc9304a3b89be0ff1583e11b34278c1ba SHA-256: e61ffa3a9b98d9dbe3085b0f17cd21e644db719447c3aad17b8b3da07ab95d8b
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs that point to compromised WordPress sites, suggesting it functions as a link farm. The document body, though heavily obfuscated, contains references to 'Assassin's Creed Liberation PS3' and 'wkhtmltopdf', which may be part of a lure to encourage users to click the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6357

Heuristics 5

  • 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
  • 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://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/9a7e812e60bb4e087ec66987ba7e1ac7/bezusamelixonojababejegif.pdf
    • https://sandzak.best/wp-content/plugins/super-forms/uploads/php/files/515e58e42d4b0863ec269599ffd80ee3/95345030773.pdf
    • http://accessprecision.com/userfiles/file/komewo.pdf
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160800e57c5bfe---88314278265.pdf
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072d2ec015a1---jinewokagilezubapidag.pdf
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/7jst09jocsi2l40nkd21t40f6f/39886390786.pdf
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/cid9kid6qmfssckjgobmc1r2k4/figupazuz.pdf
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160868df07d147---95248045879.pdf
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/gsitk3k1r48kktusqkt89v2ppm/43110650901.pdf
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078b54f8d7b4---libuvegevoxedekuta.pdf
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608283787b1f2---tupuguwixumasofan.pdf
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/7f0317ebd01cff5dc680912b597df244/5797519469.pdf
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/6b15cccd1f9c9ec9566742ec4f6d9d73/popuziputigavute.pdf
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/1a4af9cdbf54078936e856e367052f88/tuzuvowagilizumixufeviwo.pdf
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/3bff82329082d3d874d25b9ba03294ec/zurapipesowiguzemukafizuk.pdf
    • https://markeishahall.com/wp-content/plugins/super-forms/uploads/php/files/2c61e1e23329c5d243563dcc4ea4a142/mizeledo.pdf
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/vfm3r1pmae4i02nssf66j3ter0/33806569085.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=assassin%2527+s+creed+liberation++ps3
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbf5.bin
f8a69f364697532bec79f8d8bc53201e08551b05e48ebe8b15f32fc9c44eb2cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF5 5396 bytes
font_01_sfnt_off0000ee55.bin
54dc924f879ed509c8021f36815774a7bfa81c2febd7cedcbd7c573b524f6ec4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE55 2904 bytes
font_02_sfnt_off0000fa4b.bin
ac0eb8b0d40b312f083f59b670a58082c6a4121d4fc9babf9604cfab721bcdc3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA4B 10848 bytes

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