Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeb8f25cd1d197d2…

MALICIOUS

PDF

78.2 KB Created: 2021-07-05 05:15:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f09b5a8e4d430fdf24630ba235c464e9 SHA-1: ac000d08f3aa99d73201a154c30ddbd15b6bdddf SHA-256: aeb8f25cd1d197d2b9c91561a6b5dc8671eb846fdf582068f9b13fca38d7d15e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The document contains a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting an attempt to distribute malicious files or redirect users to phishing sites. The presence of embedded URLs and the nature of the heuristics indicate a likely attempt to trick users into downloading further malware or visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/va0vqrgdjnb1bcrep6pb74o6l3/18881570957.pdf
    • http://piemonteforyou.it/userfiles/file/96071458696.pdf
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/52ih483uaskl2d9e0f2p0isi1a/66309520734.pdf
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160aa05a3a970b---5176295671.pdf
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bcf73485e5---mijekabedonazufe.pdf
    • http://snnet.kr/board_pds/fckeditor/2021/06/file/95720617046.pdf
    • http://cbgnfinance.com/userfiles/file/33699351125.pdf
    • http://shadesvalleymounties1969.com/clients/868959/File/sadef.pdf
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c9571de6876---66224681673.pdf
    • http://hurtglass.pl/upload/file/4130422687.pdf
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160c52d4396c9a---53797075052.pdf
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/ebf8e8b84546d4d09731d1990d1ba178/76309097173.pdf
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/bb45a08ff1e404ce89d761137170bf26/7679225604.pdf
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/87ahd6dvlv73e9th5m4l5dv0f4/gefavilifo.pdf
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd9ce03fa0f---40473808856.pdf
    • http://goref.ru/files/file/tametexepovulodemoruna.pdf
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a92ec4a479a---wexuwovederabido.pdf
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16094898d0fd3c---94363451189.pdf
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/dl1boakoi8nscbf4lhae1rame4/tenovapixut.pdf
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc673d5c56---tudejogitez.pdf
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/ci853c5gegopcqq8sn5r4n7l64/43141849344.pdf
    • https://phr4u.com/files/92936425032.pdf
    • http://denis-lefebvre-services.com/fichiers/file/xubakez.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=48+laws+of+power+full+book+pdf+download
    • 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_off0000caf5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCAF5 16792 bytes
font_01_sfnt_off0000e307.bin
998c5f12e836709121c984239f66980bda9b910ba28dab3dcb37705b2b521434
pdf-font-stream PDF embedded font (sfnt) at offset 0xE307 17636 bytes
font_02_sfnt_off00011064.bin
2d14507a4d5153460ad069cfda3df6ab5f1c5bc06c3842f20b7459e0fdc6fe83
pdf-font-stream PDF embedded font (sfnt) at offset 0x11064 10908 bytes