Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a58cf40eb099bde…

MALICIOUS

PDF

74.4 KB Created: 2021-09-18 23:44:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b7dee4274c6dadca36ea6e95075f18d7 SHA-1: aa985f0a13d647649ef168d3aae7dda615ae0950 SHA-256: 7a58cf40eb099bde9c47ae91127f3248a10fc86017c8ab7743360156ced9adea
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that point to a link farm, suggesting an attempt to redirect users to malicious sites. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5898

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://flour.co.uk/ckfinder/userfiles/files/66048602113.pdf In PDF document text
    • https://www.utn.ac.cr/sites/default/files/files/lezozixunezexawesi.pdfIn PDF document text
    • http://gainliving.com/upload/editor/file/66610108035.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/wetasoliv.pdfIn PDF document text
    • http://cuacuonnhanh.vn/Images_upload/files/99811831497.pdfIn PDF document text
    • https://stockbauer.hu/uploads/file/86789322843.pdfIn PDF document text
    • http://donovaly-ubytovanie-safran.sk/web/userfiles/file/91080975053.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bb3a790eab---sinenipigisugiduxikuzevu.pdfIn PDF document text
    • http://www.de.ruben.pl/ckfinder/userfiles/files/76720045132.pdfIn PDF document text
    • https://reazfarah.com/ckfinder/userfiles/files/rewobukefovevu.pdfIn PDF document text
    • http://vagyonvedelemszolnok.hu/admin/fck_upload/file/58446144132.pdfIn PDF document text
    • http://zoop-tech.com/ckfinder/userfiles/files/34009178319.pdfIn PDF document text
    • https://zohopinler.com/calisma2/files/uploads/66182722942.pdfIn PDF document text
    • http://clingac.es/d/files/50565711631.pdfIn PDF document text
    • https://franciscojaviermoreno.com/DocsCKeditor/files/7850608571.pdfIn PDF document text
    • http://huthamcauquanggiap.com/upload/files/31391988913.pdfIn PDF document text
    • http://rebizplus.com/userfiles/file/guperolizotovuwaletez.pdfIn PDF document text
    • https://leganordavigliana.com/uploads/file/17594851320.pdfIn PDF document text
    • http://daugiavanthienphuoc.com/media/ftp/file/22377503512.pdfIn PDF document text
    • http://teleinwestor.pl/userfiles/file/16733466509.pdfIn PDF document text
    • http://hakasasi.id/userfiles/file/79050172765.pdfIn PDF document text
    • http://casadiriposomarsala.it/userfiles/files/50171049338.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/qams4rthhnvjpc3lb6jq4bs3u0/xopiwubitepapibopuxomo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=brooklyn+nine+nine+season+5+indexPDF 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_off0000ea6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6D 10640 bytes
SHA-256: 56dd0319dbc1e9904d06e5e35ed0e1410fc273cf3f3229567e3887aecff9e7bb
font_01_sfnt_off000102f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.