Malicious PDF — malware analysis report

Static analysis result for SHA-256 067fa8e2e4a4900b…

MALICIOUS

PDF

93.8 KB Created: 2021-07-23 03:18:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6ae1eda073c643a3cd79783fc82e46be SHA-1: 228c946348eddd7f02871e82acd2d5e3b311fdfa SHA-256: 067fa8e2e4a4900b7f949ad5dede0f1cacc8d5a710f32459ed56e71abf3c5c64
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other domains, likely intended to lure users to malicious content. The presence of multiple distinct hosts and the use of 'utm_term' parameters suggest an attempt to leverage SEO or tracking for distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/22933ca2bc43272a3952acdc795b99f8/ramuwi.pdf In PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be6cc54371f---69350543282.pdfIn PDF document text
    • https://fanaf.comarticle_ressources/file/32662638590.pdfIn PDF document text
    • http://caratow.nl/userfiles/file/89836462470.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d53d2eb270e---92011380284.pdfIn PDF document text
    • http://irina-beha.com/ckfinder/userfiles/files/zuwez.pdfIn PDF document text
    • http://arunimaflavours.com/userfiles/file/10684059051.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160d8f2ac62ab6---35458956175.pdfIn PDF document text
    • http://tz5168.com/uploadfile/image/2021/07/16/file/20210716_004350_119.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/ov90t47k4r9f89jeakgmsnikam/ruzewesamaxaliwipuw.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f161366b14---33915873124.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c900813494---tedivedonasu.pdfIn PDF document text
    • https://deniz-sogutma.org/img/userfiles/file/bovuromoxikuzosated.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/ae4f24ef2289b75e3f16292d0f310402/54228466943.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609d14a7bdd36---sazulokadamijuxamuxij.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e62245cbe60---60814704836.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/62be88defb8f1ae95ac4792544fa9443/68913193277.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7d7dc0e5a0---85110840564.pdfIn PDF document text
    • http://vertinu.lt/ckfinder/userfiles/files/7539553920.pdfIn PDF document text
    • http://datong-travel.tw/upload/ckeditor/files/20210716090359.pdfIn PDF document text
    • http://drsuthichai.com/userfiles/files/40154011588.pdfIn PDF document text
    • http://zulassungsservice4you.de/bilder/file/95649536147.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160946f3f613d1---gijukivaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=definition+of+interminablyPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0A 20824 bytes
SHA-256: 19da68a3c5aec7cb8eb455f1a5aad2df5b4af73798ddb3ed84c58e38a284d439
font_01_sfnt_off0001245b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1245B 10460 bytes
SHA-256: 2854d36ce1ed996ecaa4930207579ad20ac23b6bd50682050df9b9d5aae8d0b1
font_02_sfnt_off00013c16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C16 16060 bytes
SHA-256: 8bfc5e2f6383778b4716e60c732a7e5228106b692ca52c1f6b3c0b2892049825
font_03_sfnt_off00015129.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15129 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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