Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3b48ccbffdf0edf…

MALICIOUS

PDF

72.1 KB Created: 2021-09-22 12:49:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d7f988dc7dbd081b8d2e416fbc58ebfc SHA-1: 76a75972ea74584527cc9524d1c5cba590374a1d SHA-256: e3b48ccbffdf0edf1c4b915e445ff99185f2050f5ddea506d0e5014036995c1a
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which are flagged as part of a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8295

Heuristics 4

  • 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
  • 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://emartdeko.pl/galeria/file/rewuralug.pdf In PDF document text
    • http://zerosquareonline.com/file/30907223235.pdfIn PDF document text
    • https://membermimpi.com/contents/files/fepowe.pdfIn PDF document text
    • https://laser123.com/geektic/files/44326666500.pdfIn PDF document text
    • http://liqaa-lb.com/files/userfiles/files/zitusomiju.pdfIn PDF document text
    • http://hooleihomes.com/cms_images/file/lemokigixuwo.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614ac8ea6daa8---panutinajakiwese.pdfIn PDF document text
    • http://axi-hohenstein.de/userfiles/file/pexozakan.pdfIn PDF document text
    • http://bighost.vn/uploads/userfiles/file/xagetufulaga.pdfIn PDF document text
    • https://colegiumaniucarei.ro/ckfinder/userfiles/files/mabag.pdfIn PDF document text
    • https://2acontractor.it/images/file/zibolidus.pdfIn PDF document text
    • http://staresecurity.com/userfiles/file/9485792603.pdfIn PDF document text
    • http://ersenergy.com/UserFiles/file/wezuzalar.pdfIn PDF document text
    • https://linkevicius.com/upload/galery/file/98134668126.pdfIn PDF document text
    • https://rm-parketi.si/uploads/rulapisu.pdfIn PDF document text
    • https://dom4m.by/userfiles/files/13080532254.pdfIn PDF document text
    • http://internet-trade.eu/UserFiles/file/49797238840.pdfIn PDF document text
    • http://sochi-riba.ru/ckfinder/userfiles/files/64139137353.pdfIn PDF document text
    • http://razaviota.ir/basefile/razaviotair/files/71210056012.pdfIn PDF document text
    • http://usaoxin.com/userfiles/2021-9/file/resigoxazada.pdfIn PDF document text
    • http://swhwsolution.it/ckeditor-ckfinder-integration/uploads/files/zebuzojadulewazuvuje.pdfIn PDF document text
    • https://big-affaires.com/img/pics/files/zenupomumixikibixiwesigu.pdfIn PDF document text
    • http://xn--q20b13r9leepaeb.net/upload/file/202109010653475938.pdfIn PDF document text
    • http://beiks.info/public/file/23177772180.pdfIn PDF document text
    • http://zonazero.es/userfiles/file/49174472861.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=king+of+fighters+magic+plus+2+apkPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eabe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEABE 17892 bytes
SHA-256: 4fd3c52669fd57d29f11e2a789ba45dd7b1d8b265df8317e34f900d2037d3def

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