Malicious PDF — malware analysis report

Static analysis result for SHA-256 9be232fdd1f8fc8e…

MALICIOUS

PDF

80.4 KB Created: 2021-09-16 18:58:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 6d20b4f0feabfbeed1708aa88b764fc7 SHA-1: b7180a1cd15512307e9dff8e8c22a07c458ca534 SHA-256: 9be232fdd1f8fc8edcf787e4d4b5662a31aae83d6da2ff6e3f303f8b74f8b623
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The heuristic firings indicate the presence of external URIs and a link farm, suggesting the PDF is designed to redirect users to potentially malicious websites. The ML classifier and ClamAV detection strongly support its malicious nature, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8140

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 https://ketchas.ru/uplcv?utm_term=autovelox+su+google+maps+android PDF link annotation
    • http://ambulatorioveterinariomariani.it/userfiles/files/lurudumadowuzeb.pdfIn PDF document text
    • http://gearonlaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/31624729898.pdfIn PDF document text
    • https://edu-mate.kr/_UploadFile/Images/file/wewovuwu.pdfIn PDF document text
    • http://tsnpharma.com/upload/files/71062718180.pdfIn PDF document text
    • http://museodegliarazzimarsala.com/userfiles/files/domajatiwegeratumenuvova.pdfIn PDF document text
    • https://houstoncoinshow.org/FCKeditor/file/89558073399.pdfIn PDF document text
    • https://ventadeterrenosurbanos.com/userfiles/file/tujitinu.pdfIn PDF document text
    • http://konditsionery-zheleznodorozhnyi.ru/upload_picture/file/wegavudolozojatubigawuta.pdfIn PDF document text
    • http://heaig.org/editor/ckfinder/userfiles/files/gelamozefelos.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e14cd1f98f---wuvalipaxotixuvumu.pdfIn PDF document text
    • http://sage-chem.com/image/files/20210903_141316.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/vegiferow.pdfIn PDF document text
    • http://www.stsmcc.org/www/js/ckfinder/userfiles/files/10191254917.pdfIn PDF document text
    • http://kirakuramenandsushi.com/uploads/files/zapevoniwesege.pdfIn PDF document text
    • https://fullprotec.com/ckfinder/userfiles/files/28563737428.pdfIn PDF document text
    • http://bukharageorgia.com/sites/default/files/file/89120538029.pdfIn PDF document text
    • https://manualismedicina.hu/fileok/file/89085604623.pdfIn PDF document text
    • http://hospitalityroyal.com/upload_files/file/jagujolupefonawufi.pdfIn PDF document text
    • https://kozlovka.mebel18.com/uploads/files/dugiriz.pdfIn PDF document text
    • https://hitourkorea.com/FileData/ckfinder/files/20210906_FAA856AE2EF6C62D.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138fbfdba9ca---12002499387.pdfIn PDF document text
    • http://ipcmanpower.com/admin/style/images/userfiles/file/bojepubow.pdfIn 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_off0000e4dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4DD 17948 bytes
SHA-256: 5ece221fcaa4c2fe3ed0e232475e216c1a1bab97ac2cca8f1c512c0f4a0d8266
font_01_sfnt_off000113f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113F5 10984 bytes
SHA-256: 03c462969c33e08cbaf7146cc9550884f8de688431a7399db654ff85baeb467b
font_02_sfnt_off00012d52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D52 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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