Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2af6efeb9a7c69c…

MALICIOUS

PDF

74.1 KB Created: 2021-09-15 16:00:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2ed051957186a737e20ecbe72206b214 SHA-1: f306bf5e3c88087921dd2c7585e6d11f14a48992 SHA-256: e2af6efeb9a7c69c18c41d9ea1ba6c88fa157d0e6ea07d3a5b456c6ee5004e37
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and exhibits characteristics of a link farm, with numerous embedded URLs pointing to potentially malicious domains. The PDF structure and embedded links suggest an attempt to redirect users to phishing or malware hosting sites, aligning with spearphishing tactics. No scripts were extracted, but the presence of many external links indicates a primary function of directing users to external resources.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3852

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 https://coretry.ru/uplcv?utm_term=text+notification+sounds+for+android PDF link annotation
    • http://petukmahaaaraj.com/userfiles/file/nesewitutaw.pdfIn PDF document text
    • http://yusungchart.com/userData/board/file/37777680258.pdfIn PDF document text
    • http://dynamicyunnan.com/ckfinder/userfiles/files/vitewivozibajulugoj.pdfIn PDF document text
    • https://inwestorfinanse.pl/userfiles/file/wusukibupazosika.pdfIn PDF document text
    • http://sosonomo.com/ckfinder/userfiles/files/fujosazipalafiwun.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e96dd41257---95413252154.pdfIn PDF document text
    • http://www.papelerialapiceros.es/ckfinder/userfiles/files/30970094897.pdfIn PDF document text
    • http://bwc.lt/i/90035649353.pdfIn PDF document text
    • http://fewo-spreewald-schoetzigk.de/brandenburgtag/img/editor/file/sudumazogeso.pdfIn PDF document text
    • http://brava-ekb.ru/userfiles/file/19216199305.pdfIn PDF document text
    • http://abbeytraining.net/userfiles/file/sebigiluwuxarudagepokegu.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/4c00ab456de2bbc8e1400160c96e1d83/bosijorireza.pdfIn PDF document text
    • https://clubsecurite.fr/webroot/upload/files/2443133892.pdfIn PDF document text
    • http://studiorinaldibedin.eu/userfiles/files/22195761664.pdfIn PDF document text
    • http://hodori247.com/uploads/files/relafoxemitozafisu.pdfIn PDF document text
    • http://tanphatinst.com/vietkiendo/upload/file/pemidoligukavuwejigo.pdfIn PDF document text
    • http://xn--12cfu9bc1efac9a9azfdsb7b9d1f0j.net/ckfinder/userfiles/files/47531709556.pdfIn PDF document text
    • https://melnikhouse.com/userfiles/file/xenipagilotinapajede.pdfIn PDF document text
    • http://gemculture.com/userfiles/file/jopujisipobopugawozibo.pdfIn PDF document text
    • http://mtcongnghiepxanh.com/upload/fckimagesfile/1901869903.pdfIn PDF document text
    • http://modnyi-buket.ru/uploads/files/15204767977.pdfIn PDF document text
    • http://zhizhencn.com/filespath/files/20210910090022.pdfIn PDF document text
    • https://macauroommate.com/ckfinder/userfiles/files/vonufobejumoxadiparuxeje.pdfIn PDF document text
    • https://careerroots.net/ckfinder/userfiles/files/81984636683.pdfIn PDF document text
    • http://saigonford3s.com/uploads/2021-09-04/images/files/23539804814.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_off0000df96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF96 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f7a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A8 18212 bytes
SHA-256: 6e9e22b959e99f183c299482379f51e06c2ed2399b41e4597e5e952d935c6872