Malicious PDF — malware analysis report

Static analysis result for SHA-256 520ced8885be34c0…

MALICIOUS

PDF

85.1 KB Created: 2021-09-14 02:55:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: bdafaf8a5dff6250736f0db4a4476026 SHA-1: 8ec47ae7cdd6748b155e132b7bc320b2d7613ef7 SHA-256: 520ced8885be34c07e47e850147b967a5ebdfa1ddcf8db7b150279793192b2fc
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating it is designed to redirect users to potentially malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The presence of embedded JavaScript points to T1059.007, and the overall nature of the file suggests it was delivered as a spearphishing attachment (T1566.001).

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://giorgimpianti.com/userfiles/file/meposexanozorigafawotiwo.pdf In PDF document text
    • http://gavionescodeinsa.com/userfiles/86403350602.pdfIn PDF document text
    • http://poongdung.com/FileData/ckfinder/files/20210904_49FD8974721FEC88.pdfIn PDF document text
    • http://pathtojanna.com/userfiles/files/vesalarafexakot.pdfIn PDF document text
    • http://pajurioverslas.lt/ckfinder/userfiles/files/59633403657.pdfIn PDF document text
    • http://www.mbk-montage.nl/ckfinder/userfiles/files/daguv.pdfIn PDF document text
    • http://mcserpenti.com/userfiles/file/72287383029.pdfIn PDF document text
    • http://architettorobertafasola.eu/userfiles/files/zoxanipimuvejunez.pdfIn PDF document text
    • https://reaga.net/js/ckfinder/userfiles/files/xosivodopetaveruzomaje.pdfIn PDF document text
    • https://purefeeling8.com/data/file/88683666714.pdfIn PDF document text
    • https://luxurybaths.marblobaths.ph/app/webroot/img/files/lakonugijewilorawumovuja.pdfIn PDF document text
    • http://penzionnakrizankach.cz/ckfinder/userfiles/files/29803376289.pdfIn PDF document text
    • https://chowdhurytourism.com/ckfinder/userfiles/files/51138052388.pdfIn PDF document text
    • https://www.hotelrestaurantmacarena.fr/ckfinder/userfiles/files/zawirajukad.pdfIn PDF document text
    • http://lsphc.com/userfiles/file///64782575878.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612eeea39e47c---gunijuwupigikevofipifisat.pdfIn PDF document text
    • https://maintogelonline2.com/contents/files/27832644757.pdfIn PDF document text
    • http://gpshardorawal.com/hemkunt/userfiles/file/76701809793.pdfIn PDF document text
    • http://fructusartis.com/i/File/41697351675.pdfIn PDF document text
    • http://montex.pro/uploads/userfiles/file/96222966205.pdfIn PDF document text
    • http://mrspk.com/ckfinder/userfiles/files/gisevolebolerubafenopolib.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=pokemon+x+emulator+pcPDF link annotation
    • https://lapdonline.org/file/80820560068.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_off0000dc70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC70 22420 bytes
SHA-256: 0e0b0cd028b2def65910603043b30ffcc686d95884936937bd4c506fc0321838
font_01_sfnt_off00011691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11691 10572 bytes
SHA-256: ff6179262f6ef6598b43523cd6ad06a7afdf5f43f9a3b0954c638e414e86c129
font_02_sfnt_off00012ebb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EBB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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