Malicious PDF — malware analysis report

Static analysis result for SHA-256 07723bcdd2046eb4…

MALICIOUS

PDF

83.2 KB Created: 2021-06-27 03:34:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 07df4f5d6c441fb0910e7c974265032a SHA-1: 789a6fb254266e2347461634725ca139e510947a SHA-256: 07723bcdd2046eb4e565eee7005dfed673c20bfa1d1270754a1bf496d846ab82
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous URLs pointing to compromised websites and potentially disposable hosting, suggesting an attempt to distribute malware or engage in phishing. The presence of multiple external URIs and a link farm heuristic strongly supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/814b4939fb05164a467513a05c94b766/21185623037.pdf
    • http://elsekmont.eu/userfiles/file/96064438904.pdf
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b0511f650b1---1701732204.pdf
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad266bae0a0---32916830223.pdf
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd8cf1d546---tilafuxagubewukotav.pdf
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb0a43b6920---83865877470.pdf
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbab64364b---zefutitagojif.pdf
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160abaa01d014d---gesulimutawelowukarumuvu.pdf
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac259c01166---11288640822.pdf
    • http://intergeored.com/upload/File/19420414968.pdf
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/16235ece1b4097fbe4e215ec5c9338bd/25408730874.pdf
    • http://cuatudongsaigon.vn/uploads/files/zapotevebakunakexafo.pdf
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bc7e4a821a9---mezuzubeduta.pdf
    • http://esejsc.com/upload/files/jibozabile.pdf
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/09bd40794159d9ea2f2d7e2575014c96/19428690782.pdf
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/0glio79mtm1a0vlci9nq3dq36l/lomatikuwotozof.pdf
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3bfcafb6f---539584920.pdf
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/h75acj5mgl9shru5udbrdko7tf/topimilisisiputumiros.pdf
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608651da4671c---64048429365.pdf
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/7364ca45a9f1ab13682909a750257afc/47455816524.pdf
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/11cb3fdcbac52012f6054cdd10214698/8418092225.pdf
    • https://bank-kredit.at/ckfinder/userfiles/files/xikixokafo.pdf
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/7c1e1291964b7f0e7c97ed5b8855ad27/razezel.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=knee+pain+and+tingling+in+foot
    • 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_off0000e4b7.bin
b0ea4e194ab415e38e8ff4dafa324a75999d7fb83c874decf627bc9e7068b8f1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B7 10396 bytes
font_01_sfnt_off0000fc16.bin
434304f844e8617c82855bb7f08df5fb293ab79518c0d2f2a24715bf6fb99f4a
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC16 16132 bytes
font_02_sfnt_off000125e1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x125E1 16792 bytes