Malicious PDF — malware analysis report

Static analysis result for SHA-256 216eeb8e29c301b3…

MALICIOUS

PDF

69.7 KB Created: 2021-09-13 11:05:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: 6423426ba14441b23743eb8236e738f2 SHA-1: 274b8cf1bac38d499e6ef31a3a0a4964d4c1c4d7 SHA-256: 216eeb8e29c301b396c031c8992722b52fcc9a4077a77ecb5ff07a7dca4c6ae0
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 0.7749

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://sushiosushi.com/uploads/files/33541855032.pdf In PDF document text
    • https://cincia.ro/ckfinder/userfiles/files/zimolivutavuvo.pdfIn PDF document text
    • https://mancomunidadvaldizarbe.com/userfiles/files/12812044222.pdfIn PDF document text
    • http://vdadanang.vn/app/webroot/assets/files/90308973760.pdfIn PDF document text
    • http://mail.me.ntou.edu.tw/ckfinder/userfiles/files/20210904_140039.pdfIn PDF document text
    • http://bradhelferlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/29294582373.pdfIn PDF document text
    • http://ecompletecontact.com/ckfinder/userfiles/files/sadirizopoxuvexukon.pdfIn PDF document text
    • https://e-casainteligenta.ro/userfiles/file/94908874940.pdfIn PDF document text
    • http://resumesfromabove.com/userfiles/file/laxumukis.pdfIn PDF document text
    • http://serbanindustrialconstruct.ro/uploads/files/18781700636.pdfIn PDF document text
    • http://www.anapharmata.hu/ckfinder/core/connector/php/files/43531408006.pdfIn PDF document text
    • http://mitcostruttori.it/userfiles/files/53129164832.pdfIn PDF document text
    • http://carnow.jp/js/upload/files/21427957545.pdfIn PDF document text
    • http://ciskmv.com/css/file/42433485003.pdfIn PDF document text
    • http://dydlhx.com/upfiles/file///2298661720.pdfIn PDF document text
    • https://agriturismoilcolle.org/userfiles/file/mezutowe.pdfIn PDF document text
    • http://recrute.fr/files/files/44280824512.pdfIn PDF document text
    • http://webinaris.org/ckfinder/userfiles/publics/files/34581204883.pdfIn PDF document text
    • http://araulmor.tel-cor.com/images/library/file/jevoluzexamolusugotatofi.pdfIn PDF document text
    • http://electronicaindex.nl/images/uploads/40321730637.pdfIn PDF document text
    • http://www.fuchingrading.com/upload/file/kigufoperimuk.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/22300478715.pdfIn PDF document text
    • https://hse.tw/upload/file/7122986504.pdfIn PDF document text
    • http://hotelalbicia.com/userfiles/file/87307826596.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=violin+suzuki+book+1+pdfPDF 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_off0000d31d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD31D 18092 bytes
SHA-256: b6f42431155c5a75ff2254a2183be6e2ae78ba0b1a7340690f7e8905775d7921
font_01_sfnt_off000101f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F3 10412 bytes
SHA-256: 197e84711c585b4f1bc2bcffca7d6e1c6728480306d7db4f926ce8bb6f944173

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