Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea69b322114e403e…

MALICIOUS

PDF

85.9 KB Created: 2021-07-19 07:31:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 14454c6677b9c82f735909bae4e3db20 SHA-1: cb826298a31d787da36eeaa6f881693e1476cd16 SHA-256: ea69b322114e403ef69bf19d3204497426bf5ddb3ec92a235c8d6fa1ac4cff40
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristics indicate the document functions as a link farm, directing users to multiple compromised or disposable hosting sites, likely for phishing or malware distribution. The presence of numerous unknown URLs suggests a broad attempt to redirect victims to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://oglethorpeclub.org/~oglethor/UserFiles/file/86351227182.pdf
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/d65e4d39f0d1c67551deea3ba4fe9f93/puwatiteve.pdf
    • http://erdbau-rauch.at/18795694818.pdf
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608a899290fc0---xejejowezo.pdf
    • http://cnpair.com/userfiles/file/vowiwojikorudifaxokakex.pdf
    • http://mkngsp.ru/upload/files/bukibukurajod.pdf
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa4a321324---junus.pdf
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/f72a66a2ecc481ac4adee682f670a98c/voliruk.pdf
    • https://binarbaidequipment.com/public_html/userfiles/file/rikepuzitoluzobamer.pdf
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/85af56ab68564370a2085018aebbaf84/gulemovom.pdf
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3e3ad36b8---2623564675.pdf
    • https://loctra.net/userfiles/file/14507065488.pdf
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160e49f410558a---57878869399.pdf
    • http://aaaexpressheating.com/userfiles/file/nukonuda.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a073f153774---bimugabifezofo.pdf
    • http://forglass.sk/userfiles/file/divadobedoxubaxodipuwi.pdf
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/oggi98e7st93j1mjob016vp1bl/wozufitudozoxi.pdf
    • http://densayhongngoai.com/uploads/userfiles/file/tuzunulidojijizofus.pdf
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16080bfaf950e3---78477402588.pdf
    • http://starlightcelebre.com/clients/4/43/43e9139217482d7666ce300faf566241/File/fenomajasureve.pdf
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608db6c8d4629---meriwiwixidawawavojipunaw.pdf
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609b06c71b11b---35725441749.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=graphic+rating+scale+method+advantages+and+disadvantages
    • 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_off0000ed79.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xED79 16792 bytes
font_01_sfnt_off0001058b.bin
bd28ef8918c0d47ea484a6d18c73ef0c3e423984b56e44171b2857de06ea733b
pdf-font-stream PDF embedded font (sfnt) at offset 0x1058B 16524 bytes
font_02_sfnt_off00013076.bin
6db693f8e9950fa2fabb5b3cc4228e2d1f50ddaaa41ef9fdabb3b9d39013c31d
pdf-font-stream PDF embedded font (sfnt) at offset 0x13076 11064 bytes