Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6be5fdfa63752b4…

MALICIOUS

PDF

137.7 KB Created: 2021-06-26 00:44:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f91870eb30c5b18e39743ea4aed10686 SHA-1: e426dfc6d423c341e8cd1449bfde0b9ce934f2cc SHA-256: c6be5fdfa63752b475d80ebce4c5ccbce032b37108dc41da795a039eac780884
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm directing users to multiple compromised WordPress sites and other domains, likely intended to lure victims into downloading further malicious content or engaging in phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan. No scripts were extracted, but the structure suggests it's designed to exploit user trust via deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/2e71905ee6597ad770843c4eb08a8a07/92678871558.pdf
    • https://alajuusa.ee/media/contents/file/49905214886.pdf
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a224367c7de---dowuzowigeliponova.pdf
    • http://nousgarage.com/userfiles/file/rufabugu.pdf
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0f43b7f08---gimumawexobixoremobu.pdf
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c1f88f4fb56---figiv.pdf
    • https://jerseyshorepirates.com/userfiles/files/15831237363.pdf
    • http://ahxxzx.com/userfiles/202106/file/sasapazozegebupivozagewos.pdf
    • https://villatoscana-pi.it/userfiles/file/tomugovidatijexa.pdf
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/qutgt0miokie2itlgd3ko7fevf/koweluno.pdf
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16082c58ee62fc---rositugima.pdf
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608de522caa77---pipobas.pdf
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/f74fa67512b38f7ed16a7469cc70639b/fopelupol.pdf
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/10342gf1mq4kdqivn9kgejdth7/ronojefagafudim.pdf
    • https://anmimar.com/royal/userfiles/file/wewejizekewafupupim.pdf
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/9431991181778b67ee9c3c4261e952ff/fezozatelukozerajafu.pdf
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606e876c76953---fuxevugojixalibutunilo.pdf
    • http://thedreaminitiative.org/Content/Admin/uploads/files/90553868114.pdf
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/rtabfjd5odfqijstnbs2e7521b/45283893348.pdf
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0700122356---38792267900.pdf
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607621a9e958f---61438567273.pdf
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607fc593a8992---51729541695.pdf
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160881fb039ab1---18971210097.pdf
    • http://technocom.pl/editor/file/vututinato.pdf
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607adc430bbec---bawaluzavoxad.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=the+ohlone+way
    • 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_off0001bc7f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BC7F 16792 bytes
font_01_sfnt_off0001d495.bin
c58740857bdd957a75e87673999b268163aad81a0dd0b62808577365f77beb74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D495 9908 bytes
font_02_sfnt_off0001ea72.bin
5c7243a335f12cba34f721cb1663c02fd4c2b98755b9c310975e07891b52d7fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1EA72 18176 bytes

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