Malicious PDF — malware analysis report

Static analysis result for SHA-256 ada7e8361d55e422…

MALICIOUS

PDF

64.0 KB Created: 2021-09-27 14:53:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 751c70c190e37e6625b2fffa25d3455a SHA-1: b41f67a0b871c019a57e4d835169aebc2527f342 SHA-256: ada7e8361d55e422ba39866155475888f1bb5f5442ebd195f5289519ec25bd40
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The PDF contains numerous embedded URLs, many pointing to disposable domains, and is identified as a link farm. While no scripts were explicitly extracted, the presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics suggests an attempt to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6907

Heuristics 4

  • 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.
  • 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://boras-sjuharad.boj.se/uploads/userfiles/files/46527557855.pdf
    • https://dhrc.in/userfiles/file/5590034998.pdf
    • http://dokturmice.com/ckfinder/userfiles/files/58057141072.pdf
    • http://sql110.com/pic/pogaxavobi.pdf
    • http://goodlife88.com/uploads/files/xeraxipen.pdf
    • http://kaies.net/upfiles/file/refinumitetupikakogogila.pdf
    • https://arhstroi.by/uploads/files/vabiwe.pdf
    • https://longislandinvestmentadvisors.com/nini/userfiles/file/34330329596.pdf
    • https://romalasergroup.com/userfiles/files/12291698645.pdf
    • https://portalkucharski.pl/app/webroot/media/files/12136975230.pdf
    • https://allianztc.ro/files/file/84184272515.pdf
    • http://startmatbaa.com/userfiles/file/gagudufoloxu.pdf
    • http://symbioticlifetech.org/attfile/fckimg/file///20210906131113_748878959.pdf
    • http://thepokewave.com/uploads/files/botesepogokopuzopoweli.pdf
    • http://anadolumatbaa42.com/genelresimler/file/tazamilarozivim.pdf
    • https://asiapharma.la/files/files/teragimixoru.pdf
    • http://bacsionline.net/userfiles/file/garodukokawevinu.pdf
    • http://lctrading-gmbh.com/ckfinder/userfiles/files/52684171810.pdf
    • http://bjhtdszdh.com/v15/Upload/file/20219497205413.pdf
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/jo3v5m4igo433gtt9uaruk683r/tizubenajir.pdf
    • https://yumasri.com/assets/ckfinder/userfiles/files/75989196067.pdf
    • http://notar-frings.de/userfiles/file/sumux.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1613992bf412be---kelovozebib.pdf
    • http://paradisoseminatrici.it/userfiles/files/25383992344.pdf
    • http://princeverma.in/uploads/files/guvuxopexolitivubuz.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=screen+recorder+by+kimcy929
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b1e1.bin
dd05a48c9bb818a1544a0e8757cce79d590ce7df3aff31ce240692bf51dbff5a
pdf-font-stream PDF embedded font (sfnt) at offset 0xB1E1 17252 bytes
font_01_sfnt_off0000de84.bin
63d56b76018a4741ebf908176956cfaa2091e183f7320e5cfc49f73757f80e53
pdf-font-stream PDF embedded font (sfnt) at offset 0xDE84 10768 bytes