Malicious PDF — malware analysis report

Static analysis result for SHA-256 d46625865f783731…

MALICIOUS

PDF

96.0 KB Created: 2021-06-28 07:15:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 354ccfbccf9b9df915f5b28616f35aeb SHA-1: ed48cdb8bc59b1cde0aa3174ddf698afff65bb2e SHA-256: d46625865f783731b6a062da31b08bb472d4b2173a3128d31162e150aee779de
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress uploads and other potentially untrusted domains. The presence of these links suggests an attempt to lure users to malicious sites, likely for phishing or to download further malware. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF dropper.

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 https://myveolife.com/wp-content/plugins/super-forms/uploads/php/files/51d9e5b78fef6543f0aa3ea57656b367/15008923493.pdf
    • http://skoleniridicubrno.cz/ckfinder/userfiles/files/nitunatokenu.pdf
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/cf3cea3b5c7b29c52c241df8c94b34d1/39928361786.pdf
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609a6c08da052---vanoz.pdf
    • http://www.siscbolivia.com/admin/uploaded/fck/file/65418013603.pdf
    • http://gadkowski.pl/repository/filemanager/file/72838790892.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16077409d89c70---vemunurosejak.pdf
    • http://alliance-ltd.com/userfiles/nirapuredipulutawigopuwa.pdf
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/1608270a0dd51d---74914420661.pdf
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607d69957acc1---josabulagowopolo.pdf
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/843972e3b9e101b522790b52cdc305b7/18014187125.pdf
    • https://avigailpekelman.com/sites/default/files/file/melid.pdf
    • http://drivingschool-brno.eu/files/59368670160.pdf
    • http://straub-online.ch/userfiles/files/wegobelitasizesesoxi.pdf
    • https://samarpanbharat.org/trila/userfiles/file/sareninovetiz.pdf
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9780bfb55---53442680199.pdf
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f00532897---46788297911.pdf
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a70b4f7edca---kakufidu.pdf
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b22fb8510f0---bazipetomin.pdf
    • https://petala.gr/userfiles/file/zogara.pdf
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607bca43e2cb6---ribasitolofesoxibajit.pdf
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/59huqf93opchjnh1a83tk9q8b4/83857393636.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=state+and+explain+faraday+law+of+electrolysis
    • 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_off00010ce5.bin
7f054f5da26df0470afc037da07425e8074901e4a289839129da5db9ad9a3a4d
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE5 18684 bytes
font_01_sfnt_off00013eb8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13EB8 16792 bytes
font_02_sfnt_off000156cf.bin
a275e8556dc5fc3e4efa398f9381bfd8f80bd1abc8c024003c94098a6be20bd9
pdf-font-stream PDF embedded font (sfnt) at offset 0x156CF 10988 bytes