Malicious PDF — malware analysis report

Static analysis result for SHA-256 94f18f0ea295ad1a…

MALICIOUS

PDF

94.0 KB Created: 2021-06-28 16:51:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8a41446e823f8a88318233c9e6b1b78b SHA-1: 959d4836fd11a672cff6eae308f485c6cd05e919 SHA-256: 94f18f0ea295ad1a2bc96a605b394e84bcf7dab972ca060ea07277d597428dcf
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to domains that appear to be either compromised CMS uploads or disposable hosting, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. No scripts were extracted, but the structure and URL patterns are consistent with a link farm designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

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 http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/16081d9d12bbf3---46568848119.pdf
    • http://ahkjt.com/upfile/file/felekovuri.pdf
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608103d3ccf47---17694153631.pdf
    • https://balaji-technology.com/userfiles/file/27031697208.pdf
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160a0b9b34d573---40266892341.pdf
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a46b54bf2ad---wixanalo.pdf
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fcb9c334e3---nadegukirexikowerubug.pdf
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/7e50d627929deeac1b8bf34eb60a6268/lisefokanona.pdf
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/10a8e8639cdc13465622183cea076a7c/24222177594.pdf
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607701d28dbfa---denupazodubukiw.pdf
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/919e80bc37063fa867b28580325d36bb/wodunixugidobumuneginiw.pdf
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/ne7em7s7lpmm1q2oqpka0dce76/66340299652.pdf
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/c610dc88b01db6240b482f4255ff2eb6/25371960658.pdf
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160902b2a4824a---1861473347.pdf
    • https://my-natural-style.net/upload/files/57109721635.pdf
    • http://sitoad.com/bbqjoekey/files/202106190550521598.pdf
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608e972b576ee---ziwumebovav.pdf
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a1bc6c149c6---25039179767.pdf
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1b8b2ca3b7---xibupaw.pdf
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/alcrgd1onnscesk4bik0jaaok7/92436181587.pdf
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160909d0ce9091---21387087431.pdf
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/d8cd1fe747096fdc4740a933b6e34a48/nilebelodenov.pdf
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c458d4eca30---48757989375.pdf
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/gonp7fbqha5clf810gcms2igg7/lideratu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=chapters+in+organic+chemistry+class+11
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3e2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E2 16792 bytes
font_01_sfnt_off00010bf9.bin
1dd56abaa272b4889b3f0c37a705d8c2150115f9b6746e4ad0581c5afe3e2622		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BF9 11016 bytes
font_02_sfnt_off00012581.bin
4cbc27eee68f1246be69396372ea094722b85fac4b7a0f4c9008de830ecf86e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12581 17488 bytes
font_03_sfnt_off00015351.bin
450eea5fc67953cc3bdc764260aa6f1739571c17331c9588074966c3dbef4c6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15351 16088 bytes

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