Malicious PDF — malware analysis report

Static analysis result for SHA-256 46e695c9e27d85ee…

MALICIOUS

PDF

64.0 KB Created: 2021-09-20 13:45:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1c5c924f983301445d0a1c91e4d6b338 SHA-1: 11083faf60e2f64564a93930e43d8958a07893e8 SHA-256: 46e695c9e27d85ee01512c014e9e9377c6a91f1791c53878111b01863fbf83ec
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious content. It contains numerous embedded URLs pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a tactic to obscure the true destination of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7151

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://cructi.ru/uplcv?utm_term=duplicate+contacts+in+android PDF link annotation
    • http://farmaciafici.com/userfiles/files/xomajodoneso.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d4b3254a22---65138137098.pdfIn PDF document text
    • https://honkakuji.jp/honkakuji/images/ckfinder/files/sofalunolufipenubovisupez.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/jizenofamijowuseraged.pdfIn PDF document text
    • https://organicfertilizerproduction.com/d/files/69056007469.pdfIn PDF document text
    • http://aow.infogestnet.it/ckfinder/userfiles/files/36761078111.pdfIn PDF document text
    • https://bazab.ru/ckfinder/userfiles/files/kupinusazelimuvu.pdfIn PDF document text
    • http://rogersdesignhouse.com/uploads/files/lobivelepus.pdfIn PDF document text
    • http://oasishs.com/uploads/files/20210914_165525.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/pesuzugirunagefopifexa.pdfIn PDF document text
    • http://balmybnb.com/t/tutorfirm/uploads/ck/files/pabufukipaninezoxaz.pdfIn PDF document text
    • https://xn--80ag1a2a.xn--p1ai/files/file/19308641049.pdfIn PDF document text
    • https://alev.az/userfiles/file/14449652315.pdfIn PDF document text
    • https://ewastexperts.com/userfiles/files/niwasiwijanowazega.pdfIn PDF document text
    • http://highgaincomposites.com/img/file/202191305044.pdfIn PDF document text
    • http://ecohouse-lab.de/userfiles/file/68929375591.pdfIn PDF document text
    • http://lj-group.cn/upload/files/68801069260.pdfIn PDF document text
    • https://people11people.com/uploads/File/69653215230.pdfIn PDF document text
    • http://kotolantopeni.cz/file/zagesunimedudukolejipisof.pdfIn PDF document text
    • http://surtek.biz/image/files/20150330_063745.pdfIn PDF document text
    • https://cjsc.se/ckfinder/userfiles/files/8127050139.pdfIn PDF document text
    • http://chi-kara.net/userfiles/file/gobevewojugobisoririg.pdfIn PDF document text
    • http://es-iyashinomori.net/yamituki-n/uploads/files/46774050602.pdfIn PDF document text
    • https://myreply.mobi/snappshott/editor//file/jeluwaxiju.pdfIn PDF document text
    • https://e-midas.ro/files/file/folinimebuxojose.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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