Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e148a39289f9bc8…

MALICIOUS

PDF

85.0 KB Created: 2021-09-22 19:16:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1be1a6a5a1c7077d4a77adc24ded44e1 SHA-1: dba03c50f41046961fe1ee6e4246d3337fa7d8ad SHA-256: 9e148a39289f9bc8592147f0cafe16d2474c0dbf624d7df05ebcacb41c54b967
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, and one heuristic identifies it as a link farm designed for SEO manipulation. While no scripts were explicitly extracted, the nature of the PDF and its embedded links suggest an intent to redirect users to malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://sanipro.ma/app/webroot/uploaderfiles/92106123066.pdf
    • https://emtracing.net/userfiles/file/balapuxil.pdf
    • http://cdmatik.com/uploads/file/29273583032.pdf
    • http://xn----9sbkvfu2aex3d.xn--p1ai/ckfinder/userfiles/files/34673837404.pdf
    • https://castilloexterior.es/ckfinder/userfiles/files/57731896448.pdf
    • https://eslms.com/userfiles/file/jaminenevogazive.pdf
    • http://tvtamminhphat.com/uploads/userfiles/file/72747353360.pdf
    • http://kursadowicz.pl/Upload/file/getijolumotozedefen.pdf
    • https://peintures-descours.fr/fichier/files/gomoduw.pdf
    • http://xinghui.co/upload/ckimg/files/202109212236212178.pdf
    • http://scuderieverdina.it/scuderia/userfiles/file/febizamamesu.pdf
    • http://synphabase.ch/upload/file/kafebovifivu.pdf
    • https://indiansabroad.uk/userfiles/file/wofubivifi.pdf
    • https://manage4.realtourvision.com/rtv/ckfinder/userfiles/images/files/vilawawewiso.pdf
    • http://www.egymast-segito.hu/uploaded/fck/file/kigodidojofokawa.pdf
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16138dc1c9350e---lipozilumenifog.pdf
    • http://studiospazioambiente.it/userfiles/files/25492931208.pdf
    • http://sunrui-ti.com/d/files/1751522514.pdf
    • http://bestpokeya.com/uploads/files/pubugatenenorasumemiwaru.pdf
    • http://luxcottage.ru/stroykamen/userfiles/file/jibatirojujaxaluriva.pdf
    • http://roomyab.ir/basefile/roomyabir/files/38399808166.pdf
    • http://www.mecateengenharia.com.br/ckfinder/userfiles/files/68930350080.pdf
    • https://greenfuturevietnam.com/Upload/files/favowibevolidar.pdf
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142a899b4e7f---dadekejumo.pdf
    • http://boldogelet.hu/media/50377017416.pdf
    • http://ski-experience-japan.com/images/blog/file/worovejodexawapubekiludex.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=android+7.1+download+software
    • 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_off0000e80e.bin
db63a5e87b1656d8f92d3a901969e183108a40b4363726bbc3d7681258009531		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE80E 10584 bytes
font_01_sfnt_off00010080.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10080 16792 bytes
font_02_sfnt_off00011892.bin
f011097c6d3c88d66f93f4f01a08cc7c69ed54553c748669d879b8e83b1d40ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11892 17704 bytes

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