Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e74878d39c8ab17…

MALICIOUS

PDF

77.1 KB Created: 2021-06-10 12:36:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a8e1646508462db9dd9464b34f55a87 SHA-1: 7e07eca3f73aac731e793d6f5c73dfd68fea802f SHA-256: 9e74878d39c8ab175e994ede09fed563ebe8d64053df745bfb2ccb53031730f4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple external URLs, some of which are hosted on compromised WordPress sites. The presence of external URIs and link farm heuristics suggests the document is designed to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://infrive.ru/uplcv?utm_term=best+sugar+baby+bio+examples
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/92hbn5bgeviv436flkqvgv7fob/xuwuwekalomumunuz.pdf
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bba37e07972---14259202492.pdf
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/5d470f5b37310f31a9d909007a26f116/77498370584.pdf
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3416e6584---zijovawepotadumavulezuve.pdf
    • http://younewstoday.com/task/userimages/file/vasomupataverejobidoved.pdf
    • http://ahsaipu.com/v15/Upload/file/20214291649124259.pdf
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609ba41ab7707---21168991148.pdf
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/35c0e824e72b4919275424a92bfaeda0/tetowodanisubifit.pdf
    • http://travellightnepal.com/userfiles/file/13522820686.pdf
    • http://appartenvue.net/appart/upload/images/wadenaloguvoboroba.pdf
    • http://alliance-ltd.com/userfiles/84319779153.pdf
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d29015c1b---rajugetavewuxifememokus.pdf
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608551fc8c6b6---46297835939.pdf
    • http://slp72.com/clients/7/7b/7b902bee17765b19ebdde6030f24742d/File/semofagos.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eda4.bin
f4f5e52402c150649a041c8bfd2ca111eea838e2e2c17271125154a79e0e7621		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA4 5500 bytes
font_01_sfnt_off00010053.bin
5812f0a7a8cc9c7af556cd4fad25574ab3165baaba60d6fde54601ce293c23bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10053 11788 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.