Malicious PDF — malware analysis report

Static analysis result for SHA-256 9262c3cb8dbbccb8…

MALICIOUS

PDF

92.2 KB Created: 2021-06-28 01:27:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: eb7e10d9d9f081281afbeb4af3140d11 SHA-1: 702c897d53ff3354966f817264bcc639c85fb5a6 SHA-256: 9262c3cb8dbbccb8d0b11838d9c88a41e372f3e0675398288550ebfaf941af99
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous links to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious or phishing content. No scripts were extracted, but the presence of external URIs and the link farm structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://wastran.ru/uplcv?utm_term=dry+mouth+causes
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160954f59e6175---82058263091.pdf
    • http://tscyw.net/userfiles/file/20210611224358_5o3odg.pdf
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b75e6dee34d---4279878689.pdf
    • http://taxicityplus.ru/userfiles/file/55413779078.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/n2fhm58id3midv7tovncrso336/13993358561.pdf
    • http://paulbwatkinslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/retapojesufugiteto.pdf
    • http://werkkledingverkoop.nl/images/docman/files/nusasalutefir.pdf
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/9634399cdabf2c0b3c91c800def33452/43776354845.pdf
    • http://carriewoodfamily.com/clients/5/5b/5b9f2fb360c4065436fb7fe1267c3612/File/85688384470.pdf
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/39de48f73c1beae7aed8b53ae401b44a/64966911514.pdf
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/16082067d23085---51229353443.pdf
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/9cbadc1bc5ff5ceea37a79652832568d/24938194601.pdf
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/4teq0bskri7jpatbafnc13bqn7/jakazuzonubinewevedi.pdf
    • https://bbpartner.cz/userfiles/file/popizumumivusilebanovep.pdf
    • https://edmaker.site/wp-content/plugins/super-forms/uploads/php/files/fe87066414302e8b3754f0b0bd3ed8cc/vegitarulu.pdf
    • https://dynasty888.com/image/files/20210601_060815.pdf
    • http://ampletrekking.com/userfiles/file/putosajufuzimafoka.pdf
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/134c20f20bd2fee92c6470bcc5be562e/60866329890.pdf
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3842069ab6---44521567754.pdf
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/66820a4320d7ef034d2e059e3e130954/fijedurisasogakimunom.pdf
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/gabaa786b5s5h02ukbs8kcero9/95623910329.pdf
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a0eb736f63a---jojokuke.pdf
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b7f08d6dc9e---2864405251.pdf
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca9433341a4---69464724446.pdf
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a300f809f1a---jetawedilexapigivakozale.pdf
    • 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_off000107a3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x107A3 16792 bytes
font_01_sfnt_off00011fba.bin
c7a6b2a5089c682adb64ea6267af282355343d6dea852d3170c661ce600d3911
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FBA 10468 bytes
font_02_sfnt_off0001379e.bin
ef075bb603243838593d1a50d418f8f454c32d5e781f0cf818987ef08bd5d229
pdf-font-stream PDF embedded font (sfnt) at offset 0x1379E 17008 bytes