Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b206cbaf9476f6f…

MALICIOUS

PDF

99.2 KB Created: 2021-07-02 09:22:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c68fd3069e24470540d976acd412030b SHA-1: a5cefa1344b0c45e8033db193605c25f49bb94ae SHA-256: 9b206cbaf9476f6f9a3ee7246bb101bfde5dee74fae810cafa05297de1bb8d37
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous links to compromised WordPress sites, suggesting it functions as a link farm to distribute malicious content or conduct phishing. The PDF structure and embedded links indicate an attempt to redirect users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9885

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://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b7164b136---78121379815.pdf
    • https://bedandbreakfastchia.it/userfiles/file/39514242654.pdf
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6b8f74f05f---94501554945.pdf
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed09c61f95---zizolobomapegukuvet.pdf
    • https://jambumanis.com/contents//files/20568068706.pdf
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983c3f6bb81---25028894534.pdf
    • http://interel-rus.ru/test/sites/default/files/file/67063054030.pdf
    • https://audreyheselmans.com/_files/file/5852451171.pdf
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/27akno28pn45rvf5b4onlb91d0/61141650889.pdf
    • https://mszukam.pl/dat//file/27079262319.pdf
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/24c550620235ab5eb216b347a395790f/kekakesevorutupomunexifa.pdf
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/996474e4ec7c3f514993a1ea4dc9beaa/95493979381.pdf
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160983e5e84d53---kuverowenegojipudotase.pdf
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/35635c13065ad5d94f61ffd184c9f19b/54896805555.pdf
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/273fb346ed55968425a43d77585d3aa5/zolidesa.pdf
    • http://co-wemart.com/careeruserfiles/file/67190645850.pdf
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/16085cf3240ed5---44380660783.pdf
    • http://nappsa.org/userfiles/file/32649930102.pdf
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160a900911fc60---45446661386.pdf
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/04ce2b1c60146b49e3ee8e2980321aea/binafasemubezof.pdf
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/f323d28d3a2a9877d7b4b6ce1e9095b0/ligebu.pdf
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/05a136b2256405f323d56146458d6285/69691728388.pdf
    • http://mcutech.net/files/52780134088.pdf
    • https://studiopros.com/userfiles/file/
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a502ab49db---lozugepekazopaxajiranofo.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=medela+phototherapy+lamp+service+manual
    • 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_off00011693.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11693 16792 bytes
font_01_sfnt_off00012ea0.bin
83d8b69042e51bc20ff8f2b5d6fa789650ded0a96709c4f9a3a2a9fd205348ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12EA0 1660 bytes
font_02_sfnt_off00013685.bin
c0d5e25f9685b2329b547a64292d140e85fe0c33389f87ed13126bb3d1826db4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13685 17676 bytes
font_03_sfnt_off000164de.bin
625540df8feeb45d68d6b743c59ce4ea632185e11bf66967f93fff6c30928ea5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x164DE 11052 bytes

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