Malicious PDF — malware analysis report

Static analysis result for SHA-256 3852b2009b55d841…

MALICIOUS

PDF

63.7 KB Created: 2021-09-28 01:35:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: eef0fee725addf1d278e372571261773 SHA-1: fa802be291ed7b55d4273436bcffe5faed641fb5 SHA-256: 3852b2009b55d8412d67f941455ecbf0c2706ec021ab41032bfc23c8308a0ada
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and ML classifiers. It contains numerous embedded URLs pointing to external sites, suggesting it acts as a lure to redirect users to potentially malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high volume of links on disposable hosting, further supporting a phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6359

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://crewmak.ru/uplcv?utm_term=mi+a2+update+android+11 PDF link annotation
    • http://plkorea77.com/ckupload/files/44452724881.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/16135d31ab4134---pagelizanasopowovadas.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1614b6ddc9231c---33991011427.pdfIn PDF document text
    • https://ustunbilgisayar.com/userfiles/files/16815283247.pdfIn PDF document text
    • https://tims.ro/ckfinder/userfiles/files/ritajakutegokefinipipit.pdfIn PDF document text
    • http://szintai.hu/ckfinder/userfiles/files/76498722111.pdfIn PDF document text
    • http://www.kyousei-fukushi.or.jp/system/ckfinder/userfiles/files/94412436001.pdfIn PDF document text
    • https://mytopics.it/uploads/file/fadipixeva.pdfIn PDF document text
    • https://hram-uspeniya.ru/ckfinder/userfiles/files/17100567446.pdfIn PDF document text
    • https://powermailer.in/userfiles/file/82198718363.pdfIn PDF document text
    • http://planet-for-events.de/userfiles/file/fipobomudakurabojamevaxo.pdfIn PDF document text
    • http://faizleathergloves.com/userfiles/files/3817549133.pdfIn PDF document text
    • http://anhhieu.vn/hinhanh/file/87388577934.pdfIn PDF document text
    • https://812423.qqtogeljackpot2.com/contents/files/98207401095.pdfIn PDF document text
    • http://abbeytraining.net/userfiles/file/6440529734.pdfIn PDF document text
    • http://kargiskola.ge/myadmin/ckeditor/ckfinder/userfiles/files/bofipoletusif.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/eb9f8a98a4f01ea8d05216e18d19c94c/sitakenipirikuleremiriz.pdfIn PDF document text
    • http://alotercuman.com/ckfinder/userfiles/files/16037124937.pdfIn PDF document text
    • http://kpdb.org/userfiles/files/gedulekij.pdfIn PDF document text
    • https://italvaping.com/file/11152812407.pdfIn PDF document text
    • http://nexxosrealty.com/userfiles/files/lisigajuvefamesiwebonile.pdfIn PDF document text
    • 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_off0000ae39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE39 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c64b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC64B 15012 bytes
SHA-256: 2a5190c7569ad9eaa739d74e6f53130af95e34513ded76716a8a3c49a5d14812