Malicious PDF — malware analysis report

Static analysis result for SHA-256 93eb32264fc100d7…

MALICIOUS

PDF

70.2 KB Created: 2021-10-01 13:49:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 37f86df03e4b158ebaa1fe9f6aa801fe SHA-1: 6ed8aeaa6084fec515c9bb887d09b59499a9f4f7 SHA-256: 93eb32264fc100d799dfafb1c06bde59afb5c9c62c4057cdf5bfb584c1384f1c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, and exhibits characteristics of a link farm. It contains numerous embedded URLs pointing to external domains, suggesting a phishing or malware distribution attempt. The PDF structure and embedded URIs indicate it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://wastran.ru/uplcv?utm_term=best+anime+games+2021
    • http://2ds-creations.fr/userfiles/file/86497060851.pdf
    • http://tradotel-riviera.com/file/59515683224.pdf
    • http://muabannhagiare.net/images/uploads/files/82638187042.pdf
    • http://shukokai-voves.fr/userfiles/file/36933511911.pdf
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/161420ed2952e8---73704889851.pdf
    • https://www.playitdirect.ca/ckfinder/uploadfiles/files/vigejizopisewikuw.pdf
    • http://jingyitech.com/uploadfile/55501236488.pdf
    • http://sanga.asia/userData/board/file/3746083133.pdf
    • https://pelicanfinancialnetwork.com/ckfinder/userfiles/files/99016593273.pdf
    • http://agavietnam.com/img/files/87963139437.pdf
    • https://ekselantechnology.solutions/ckfinder/userfiles/files/tixepabada.pdf
    • https://adverto.ee/userfiles/file/34238080735.pdf
    • http://silver1979.com/upload/file/37769426539.pdf
    • http://rockycheng.com/ckfinder/userfiles/files/jilebobev.pdf
    • https://prestinieurope.ch/userfiles/files/73243078204.pdf
    • http://mobydick-band.de/fckdata/file/filowejemizuwokujinado.pdf
    • https://takarasushimn.com/userfiles/files/zaxitogetevelitoka.pdf
    • http://diadiemvui.com/upload/files/lisetikimejo.pdf
    • http://verkaufs-akademie.com/userfiles/file/51842158905.pdf
    • http://dubossari.es-pmr.com/constructor/dubossari/ckfinder/userfiles/files/gixidadovuv.pdf
    • http://ikhmongol.mn/ckfinder/userfiles/files/27431100164.pdf
    • http://tortsurprise.ru/upload/redactor/files/wopem.pdf
    • https://www.rosebankprimary.co.za/inc/ckfinder/userfiles/files/tafiwazexisowase.pdf
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000afc1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAFC1 16792 bytes
font_01_sfnt_off0000c7d8.bin
0e9039570c720bba297f4038073f1fa31188bc774d50449e3f76c53ec97af9db		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC7D8 10532 bytes
font_02_sfnt_off0000dffa.bin
2b85aae9bd272fa6f64a630e760d064564db402b4e53d2562585d624a79aac67		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFFA 17164 bytes

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