Malicious PDF — malware analysis report

Static analysis result for SHA-256 05b6fc90eb43ae96…

MALICIOUS

PDF

82.5 KB Created: 2021-06-27 01:15:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6413d99cce0217214eab1e13460c5a79 SHA-1: abb67513844d605d65c4b84bc455b0b6096a8bc9 SHA-256: 05b6fc90eb43ae96ad6754e9f681fc9a9f13da859e12b1b89dbcd376b789c346
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised WordPress upload directories and disposable hosting, indicating a link farm designed to redirect users. The presence of these links suggests an attempt to lure victims to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://shethof.ch/cgi-bin/dynamisch/file/zigivilagefipipum.pdf
    • http://www.yoko-ono.be/images/userfiles/file/gupizusulifol.pdf
    • http://chinalabware.es/d/files/nogirajuvevajowezotu.pdf
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16088efd6a809f---satigepemepukobiv.pdf
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e63a849def---28347600370.pdf
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160ab2eef0d919---98171899488.pdf
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160be0753372c6---tomesujewiralogevabazi.pdf
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160af2beec0d76---56983245959.pdf
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/k6eo40tsg1a6n4kb0sr3r0sri3/gutevasorupifugabe.pdf
    • https://cualuoihoanmy.com/uploads/userfiles/file/53916495883.pdf
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/l03v4t39k4kd6ioos7tr0qhs8c/98484659409.pdf
    • http://macautemple.com/userfiles/file/64428723518.pdf
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/c4b8d15110e59f57f69b29a318bbb991/napipuxeneselowekapogupo.pdf
    • http://x04ydivan.ru/userfiles/file/lenifijap.pdf
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/1fe76c52bb13b3357ba6152b00331049/xebepuvusaf.pdf
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/ada8dbec13ef3cadeabae09eb2c172e9/wezikoma.pdf
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b27045de34e---4440167009.pdf
    • https://personnelcle.com/userfiles/file/90917376415.pdf
    • http://greenld.com/userfiles/gigutedomexuteluvositi.pdf
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/mncb8kk4ood0vkt901h466ra1q/wukisalanuxegobuwujo.pdf
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16081438c71a7e---65657544904.pdf
    • http://bobas24.pl/Upload/file/96248721282.pdf
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a8dff64d4f---tasurisilotubagigoluxa.pdf
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160821507896f1---22168409175.pdf
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/kowuzokonabirovalu.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/c982f638213ab568b37c14c3ab0a1511/jegijijuzotupuvajufok.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=papa%27s+games+online+unblocked
    • 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_off0000df90.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF90 16792 bytes
font_01_sfnt_off0000f7a7.bin
0ed1308e1305968284707258891d82254dbbd06039cb3435de7ecf776b29a5bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A7 11024 bytes
font_02_sfnt_off000110da.bin
9d8160dd322a791828c4316ee5f88f9a599a212fd5203279707b4f8058f74e31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110DA 16896 bytes

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