Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2aa469e7c705923…

MALICIOUS

PDF

84.7 KB Created: 2021-07-02 19:18:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 98f1c210f313dc1aa8fbe1a4a3da4af8 SHA-1: f8d596737bafb90d536778bedc7a4c0a1f0b4dab SHA-256: d2aa469e7c705923517d2edd9f3ad6f53a7b203664195a1de0c8c63cb5e0bb8c
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users to potentially harmful content. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ca1970.com/clients/10044/File/36648660933.pdf
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/a14d22eb0796cdcc314933f7aea5a0aa/82046050369.pdf
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/af6c92bfa3d177e1b57b4e88b480e528/fetex.pdf
    • https://hogies.com/includes/template/uploads/file/xageko.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/778f26c06705d8d451311ebce533d184/mitor.pdf
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d85ac12a2d---86987371589.pdf
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16098f60672c77---81339594709.pdf
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d59c1212b9---ludisas.pdf
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/e23cc13b11aec2472c18ba59556dfd88/11686789221.pdf
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae533a7a74a---52438961200.pdf
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f57a3e079---katamufisefujibosa.pdf
    • https://vatlieutaphu.com/upload/files/70319900503.pdf
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f6d9645e5641dc123e225a6225447ab9/xijefojunasetasebetagowa.pdf
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a099cd7b9d8---11996879158.pdf
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9f7ce0e7de---52419318147.pdf
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/78ab28d5a59193b373002a46dc256f11/nigiraxoxadotadudakobanu.pdf
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609842835b89c---pamigomol.pdf
    • http://antansconstructions.com/ckfinder/userfiles/files/72374429546.pdf
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a243ee6c239---mabokawirunasa.pdf
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1606ced04ce3a7---kizal.pdf
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/16092f1107c006---vixumujininujukexuwitutaf.pdf
    • http://nfraccon.org/userfiles/file/sulivexabuv.pdf
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ab0c5362cea---wivaxutulor.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=national+heavy+vehicle+inspection+manual
    • 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_off0000e61d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE61D 16792 bytes
font_01_sfnt_off0000fe34.bin
b33fb94894b45ab15577247866b200e96b64c5b8ae1c8cd3c62a0ec70d23ec0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE34 10796 bytes
font_02_sfnt_off000116f8.bin
bd06251538de64c663ce35d0eeca7f141a5611b10da0a22d3d6160bc1ff0ecb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x116F8 17048 bytes

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