Malicious PDF — malware analysis report

Static analysis result for SHA-256 95dd097d34f96b43…

MALICIOUS

PDF

86.8 KB Created: 2021-06-26 16:46:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2e37aef113e16e7b095bf2c05c33e300 SHA-1: ad581fb4c778bfaa7b575eb0794eb986b5793a2b SHA-256: 95dd097d34f96b434ec7b52f638cf0e6ab9131e895d0be2d3dd10d5d00c5f6e6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many hosted on compromised WordPress sites, suggesting a link farm designed to redirect users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and link farm heuristic point towards an attempt to lure users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/i0hmgtc1eed1om3tj822jjaav0/97309688517.pdf
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/1c2845389a9626ad5121b909465561ad/80236871934.pdf
    • https://muratay.nl/userfiles/file/89206058875.pdf
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160745a9e3ffef---4331984332.pdf
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/e03646bc1dc26f863f884895e7bc1529/ladupuvapopine.pdf
    • http://yasaitogo.com/uploads/files/jatujukeloresezemupuvi.pdf
    • http://robalton.es/Albums/images/file///bipulalekiwuv.pdf
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/6c350996b9b7900d3a189bfc330fcd25/28761765295.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/16098b5287d1a7---49521013233.pdf
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160951d0dc1931---bozinarakiwimekeri.pdf
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/685b4d81f9cd773a0b022fb37602496e/nitikinesowibipiparolo.pdf
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c166c6b294b---84941084979.pdf
    • http://ahxxzx.com/userfiles/202105/file/xabami.pdf
    • https://asi-filter.pl/files/file/92369166817.pdf
    • https://pensiuneavlasin.ro/wp-content/plugins/super-forms/uploads/php/files/fdmku6kr9jfpa09la30bk6trl7/18914709963.pdf
    • http://resortcrimea.com/ckfinder/userfiles/files/28756826935.pdf
    • http://skolicka.eu/foto/images/file/41408736018.pdf
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/4975346fb9acb76a6d88ea35afcb6ed2/favigaz.pdf
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16084a645eaade---96118435461.pdf
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160787ebb3caf0---13645601657.pdf
    • https://agrimal.pl/userfiles/file/30279208537.pdf
    • http://www.dilipprabhavalkar.com/images/file/41905965143.pdf
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160bc94896a6e7---80976057767.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=fishing+one+day
    • 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_off0000efc7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC7 16792 bytes
font_01_sfnt_off000107d9.bin
fbc476324018df0ea18c05e212f7b7522f9eb35ab2047de8a0b4c2eb919815e2
pdf-font-stream PDF embedded font (sfnt) at offset 0x107D9 17540 bytes
font_02_sfnt_off000135bd.bin
119b34d0c5daa18b82e0e1934c544f0c32f082a8105bf863197e78eb540f7497
pdf-font-stream PDF embedded font (sfnt) at offset 0x135BD 10372 bytes