Malicious PDF — malware analysis report

Static analysis result for SHA-256 5aef27bafe9c80c9…

MALICIOUS

PDF

58.4 KB Created: 2021-09-11 12:33:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 5987d6a44d7dc7e1478b49e1690b0b29 SHA-1: c3b6c900ff0e83287ea5586a5d72a89c33331051 SHA-256: 5aef27bafe9c80c9d0fd0ba2c736c9847649ccc50aad45fd9ea941f7ad10b74f
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7314

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://bbpcosmetics.com/admin/upFiles/2021-9/file/vavilopojonego.pdf In PDF document text
    • https://doina.md/fckeditorfiles/file/8403749877.pdfIn PDF document text
    • http://muszempilla.com/files/file/xabijiwizapavitavoxanalu.pdfIn PDF document text
    • http://malopolskiszlakwinny.pl/upload/File/vukezinutawe.pdfIn PDF document text
    • http://bumsnab.ru/uploads/files/derilidosuju.pdfIn PDF document text
    • http://area100impianti.it/userfiles/files/peseba.pdfIn PDF document text
    • https://foodphotoshop.com/userfiles/files/sizeru.pdfIn PDF document text
    • http://risme.vn/files/81948846280.pdfIn PDF document text
    • http://m-styleauto.com/js/upload/files/25002995147.pdfIn PDF document text
    • http://riskhedgetech.com/uploaded/file/100669039361370c9f05027.pdfIn PDF document text
    • https://thefertilizergranulator.com/d/files/naresat.pdfIn PDF document text
    • https://taxforce.nl/userfiles/files/8706214743.pdfIn PDF document text
    • http://tcsklife.com/filespath/files/20210909022334.pdfIn PDF document text
    • https://mvmdigital.gr/files/files/wabetife.pdfIn PDF document text
    • https://festivaldelmaridaje.com/sgi_userfiles/userfiles/files/55629146454.pdfIn PDF document text
    • https://biblioteka-koneck.pl/ckfinder/userfiles/files/8382070072.pdfIn PDF document text
    • https://forexinc.ca/upload/editor/file/sofajaledaranudagum.pdfIn PDF document text
    • http://baodieptailor.com/uploads/2021-09-11/images/files/xaxabudimo.pdfIn PDF document text
    • http://africalegal.nl/userfiles/file/84042776583.pdfIn PDF document text
    • https://treasurehunterdetectors.solar-ovens.net/ckfinder/userfiles/files/85334436959.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/161305afbc2e6d---71215684920.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=video+compressor+panda+appPDF 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_off0000ae84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE84 10500 bytes
SHA-256: a9a478f4fb448b3bbf846a43ae31be377472e350035e0f383e00a21382c6d0f9
font_01_sfnt_off0000c64c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC64C 15752 bytes
SHA-256: 4853ffcdd42bd7ff4ab8d845777e4635a1d0664c748ea57d6afe5f20c8e0f108

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