Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5d950620cb4d671…

MALICIOUS

PDF

70.4 KB Created: 2021-09-24 18:23:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ab89d1aff86eae1189016fcca059beda SHA-1: deb26a7cbe39d259f2dbe86cfc5eab787ba340b6 SHA-256: c5d950620cb4d671e9374f96b985c6012daab3630b837cc10c544a3790130b67
146 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, indicating an attempt to redirect users to malicious content. The presence of PRC/3D content is also noted, which can sometimes be used to exploit PDF viewers.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • PRC/3D content in PDF medium CVE related PDF_PRC_3D
    PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://huntic.ru/uplcv?utm_term=townsmen+premium+mod PDF link annotation
    • https://walnutcreekguide.com/wysiwygfiles/file/kekobunelumafalope.pdfIn PDF document text
    • https://dmitrovka-zn.ru/admin/ckfinder/userfiles/files/55929988046.pdfIn PDF document text
    • http://aow.infogestnet.it/ckfinder/userfiles/files/36962186151.pdfIn PDF document text
    • http://sriraghavendratemple.com/ckfinder/userfiles/files/mobawudazodel.pdfIn PDF document text
    • http://ceraunavoltapizzeria.it/userfiles/files/9969734924.pdfIn PDF document text
    • https://ratoempat.com/contents/files/sopileputid.pdfIn PDF document text
    • http://casier-a-bouteilles.com/file/kebavosugotebibeg.pdfIn PDF document text
    • http://maility.pl/_ADRESuserfiles/file/63141926521.pdfIn PDF document text
    • http://isystem.hu/userfiles/file/19066975781.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/12e90d8a934a1ecd253e9364a810506c/65023800051.pdfIn PDF document text
    • http://dfwarbitrator.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xipudopepozazer.pdfIn PDF document text
    • http://cheniou.handysociality.com/upload/files/9129062388.pdfIn PDF document text
    • https://bold-iot.com/uploads/files/202109052034246409.pdfIn PDF document text
    • https://www.whoamiandwhyamihere.com/ckfinder/userfiles/files/rowawizozodifepukimemuw.pdfIn PDF document text
    • http://studiofagiani.eu/userfiles/files/lepuvilovubogepo.pdfIn PDF document text
    • http://swaving-stalinrichting.nl/ckfinder/userfiles/files/xabipadojetezereti.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16149779581bd5---gekitutajutirelum.pdfIn PDF document text
    • https://asthasupermarket.com/userfiles/file/72785850912.pdfIn PDF document text
    • https://infoenergie-loire.org/userfiles/file/84835566100.pdfIn PDF document text
    • http://strahovka66.ru/userfiles/file/13581213710.pdfIn PDF document text
    • https://novsport.com/content/File/16155939147.pdfIn PDF document text
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000af6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF6C 17764 bytes
SHA-256: a43b9d35a8f86b1ad5d40bcd788745a978e7ff2f22a780aaf2d744e2c8249627
font_01_sfnt_off0000dd35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD35 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f54c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF54C 10396 bytes
SHA-256: ce62d1447b1e5b1f09d2403ff3388a24f3ebe6da4868040ebc23162b6fa8b3dd

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