Malicious PDF — malware analysis report

Static analysis result for SHA-256 e66914aeb3060aec…

MALICIOUS

PDF

83.1 KB Created: 2021-10-07 04:19:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 5013685f88544b4b8233e539355d7583 SHA-1: 4aa6796c00ce9acaed72960b347034b2ad0ea4db SHA-256: e66914aeb3060aeca040fab23a3cbda236c7048e6d4964b775516ce32e06f86d
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. The PDF also includes numerous external URIs, many of which point to suspicious domains and are likely used to host or redirect to malicious content. The ClamAV detection and ML classifier further support its malicious nature, indicating it's likely a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5544

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://lagunaapartman.hu/images/user/file/vedob.pdf In PDF document text
    • https://partroyfuneralhome.com/partroy/assets/file/patozovifadazuxisoburoj.pdfIn PDF document text
    • http://evevoyance.fr/adh/.-/file/76608449272.pdfIn PDF document text
    • http://perechen-izdaniy.ru/js/ckfinder/userfiles/files/vepizuvirakeramuvat.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/nbqoq10aagf874u3788rf8pf5h/pulaj.pdfIn PDF document text
    • http://xn--80ahcjevtqq.xn--p1ai/ckfinder/userfiles/files/jamerolovogigefuvika.pdfIn PDF document text
    • http://fuyu.010bi.com/ckfinder/userfiles/files/sepuna.pdfIn PDF document text
    • https://eko-briketes.lv/userfiles/files/taxefur.pdfIn PDF document text
    • http://xutricolor.com/uploadfile/files/tivopuzu.pdfIn PDF document text
    • https://iqmuseum.mn/uploads/files/82562506642.pdfIn PDF document text
    • http://studiotecnicomancini.eu/userfiles/files/80954429531.pdfIn PDF document text
    • https://shoppingplanet.ro/ckfinder/userfiles/files/narotobamig.pdfIn PDF document text
    • http://www.bongbansaigon.com/uploads/files/86370802937.pdfIn PDF document text
    • http://planet-for-events.de/userfiles/file/9818907767.pdfIn PDF document text
    • http://specialcats.nl/media/files/satuwewamokibubom.pdfIn PDF document text
    • https://noursportevents.com/wheelmarine/userfiles/file/fuxoziletelelaton.pdfIn PDF document text
    • https://poldercuptrofee.nl/site/admin/ckfinder/userfilesfiles/xetademolevagiwawizojol.pdfIn PDF document text
    • https://pass-eco-energies.com/ckfinder/userfiles/files/86641388084.pdfIn PDF document text
    • http://biolabsrl.org/userfiles/files/xepalipawixip.pdfIn PDF document text
    • https://sangolongphuong.vn/longphuong/news/files/ronixigovowalewefufevatoz.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/998d147372bb8eb13b975c2c5b6a3900/75260356445.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=touch+typing+practicePDF 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_off00010222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10222 10616 bytes
SHA-256: cf406d95d74f7547a73f66a59ed958fa74be4ee0860c3d0d26ff1b35c920ba24
font_01_sfnt_off00011a73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A73 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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