Malicious PDF — malware analysis report

Static analysis result for SHA-256 e92ec1d32dab8a00…

MALICIOUS

PDF

73.5 KB Created: 2021-09-16 21:10:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: dbce250bfa7e11bd8cbe1f8e5e62562f SHA-1: d9912f876f8c3608a07d4debdbb1ac895c39ebc9 SHA-256: e92ec1d32dab8a00ebe01369fe4c4da6de5186e01bd59facd2d9a788fa3c4b71
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating a malicious intent to redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests the document is designed to host a large number of links on disposable domains, a common tactic for phishing or malware distribution. The ClamAV detection further confirms its malicious nature.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4750

Heuristics 5

  • 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
  • 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://imosa.asia/uploads/files/202109051421006291.pdf In PDF document text
    • https://heks-tech.com/app/webroot/userfiles/files/sowarofilesemapabediseni.pdfIn PDF document text
    • https://profipreklady.cz/www/ckfinder/userfiles/files/zitupotijupisuwuwutoga.pdfIn PDF document text
    • https://poulinstrapscan.com/userfiles/file/jonakukaxuj.pdfIn PDF document text
    • http://lica.plovdivweek.com/js/ckfinder/userfiles/files/gigapivasorekaronumewalu.pdfIn PDF document text
    • https://ustunbilgisayar.com/userfiles/files/69588990058.pdfIn PDF document text
    • http://kxqcgs.net/filespath/files/20210911155100.pdfIn PDF document text
    • http://dobre-jaja.com/Upload/file/suluxodufupakadiwefele.pdfIn PDF document text
    • http://flex-link.cn/uploadfiles/files/vinowixumebo.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/4nlv63adukam7lt80aa99k6fva/fosodapawefokuzobeluzap.pdfIn PDF document text
    • http://techscreening.com/userfiles/files/lujame.pdfIn PDF document text
    • http://bidwoodmachine.com/d/files/23991852040.pdfIn PDF document text
    • http://termosystem.pl/userfiles/file/mizexoripaviloweroguxuwe.pdfIn PDF document text
    • https://viboot.com/ckfinder/userfiles/files/tukepomuxibebize.pdfIn PDF document text
    • http://uniroll.pl/user_images/file/75374470478.pdfIn PDF document text
    • https://magnanerie-cazilhac.com/userfiles/file/fawugekegujawobururoba.pdfIn PDF document text
    • http://addon-colsman.somantec.net/ckfinder/userfiles/files/fobudeladebomu.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/28799939804.pdfIn PDF document text
    • https://cissud.it/uploads/ck_editor/files/83623843249.pdfIn PDF document text
    • http://creationart.hu/files/file/55566536867.pdfIn PDF document text
    • https://babetravelling.com/ckfinder/userfiles2/files/savumokupa.pdfIn PDF document text
    • http://linuxnewyork.com/draft/media/81652121451.pdfIn PDF document text
    • https://civilkontroll.hu/uploads/file/19094988787.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/1612e9a91eb368---temazavojutazifikigive.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=moto+g+5g+plus+custom+romPDF 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_off0000d306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD306 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eb1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1D 10456 bytes
SHA-256: 61254e32a4f040aeca0e30602a6512d06504d979dd4a5658b57d71631b41a979

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