Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba9ec5009f43092e…

MALICIOUS

PDF

77.6 KB Created: 2021-06-27 04:00:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 51b2542ad0a067c15fdaf7b179504b99 SHA-1: bfd47e280798de19a5d8439435e3f158165024e6 SHA-256: ba9ec5009f43092e0d9765641f17301a4aa7a10bd940f40fa7391c05265c80a1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm with numerous URLs hosted on potentially compromised or disposable domains, indicating a phishing or malware distribution attempt. While no scripts were explicitly extracted, the nature of the link farm suggests it is designed to redirect users to malicious content, likely leveraging embedded PDF features.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9829

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 http://kingalbertltd.com/uploadedfiles/file/kaviwojesorunot.pdf
    • http://praconsulgroup.ru/pict/file/limakexedunuwakabidozab.pdf
    • https://celebicatering.com/upload/ckfinder/files/99006801197.pdf
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/0353c00535e878d912f389f3bbcb905f/ragiruz.pdf
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/49cb84ab0cc1ae18e8c46d2a45631e2e/dixabatujizuwabow.pdf
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607663b51c463---7031020136.pdf
    • http://mindentudor.hu/userfiles/file/nexazete.pdf
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad7b135182---69038058313.pdf
    • http://supermarketdv.ru/files/file/35197179372.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609851517b623---xuzukusefomeviv.pdf
    • http://ahchala.com/img/file/84692035325.pdf
    • https://reitinguok.lt/userfiles/file/68098384852.pdf
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/5f1aba739e468fd2832d3b60550f955a/nikokukagumabefa.pdf
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b27004c5408---lakasutedokuwakizum.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4d0ee3e50b---74212094543.pdf
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609a2c7d9fff9---97179167552.pdf
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/d2118bc8337e0ec3ce2959dd0a3e5c76/fumanikopaxuwofag.pdf
    • http://beiwendq.com//data/attachment/file/11080471131.pdf
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160860dc73dcc8---49203265510.pdf
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//42435099998.pdf
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081c48626e90---rovodununudibumaduporoz.pdf
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/95bc3d599ab96a301c4fac0677ff15df/gasuvoxukesilasowo.pdf
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160af45d3d5d88---83717607915.pdf
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d39e1d2225d---gepowoninekomile.pdf
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/j06gdg8h1e9ud8rinnhe9ripvu/tenotelotav.pdf
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/q45j6bt8j6eq8bf9ejvsei5p6j/1201582559.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=saturated+fat+in+plant+foods
    • 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_off0000cef2.bin
95e8f4e1312ba35ffda9c1ffa1fcf73ce74a46d882976f3292b56e971f346382		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCEF2 16160 bytes
font_01_sfnt_off0000f8a6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A6 16792 bytes
font_02_sfnt_off000110bd.bin
0752e0d0746717a70ac3e0262734713b91c73474ee57993b44eda6add13ee5cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110BD 10668 bytes

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