Malicious PDF — malware analysis report

Static analysis result for SHA-256 e747e8ae3f5c483c…

MALICIOUS

PDF

63.6 KB Created: 2021-04-20 10:26:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d7ac6dff96bc48d42e08b88e489b5ad SHA-1: cd2761032b6dd5ee115c93a87efb53d8d96168ba SHA-256: e747e8ae3f5c483c2c7c52ea9cdb0912651f8f8aeb67645aed77772e0e5b86a4
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which are hosted on seemingly legitimate domains but point to PDF files, suggesting a link farm or redirection mechanism. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to exploit users through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9867

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://www.termis.org/system/files/webform/98565071062.pdf
    • https://www.cdcplumbing.com/sites/default/files/webform/contact-us/sawifujemenolezaf.pdf
    • https://ambrose.edu/sites/default/files/webform/zabufenopi.pdf
    • https://www.mainephilanthropy.org/sites/default/files/5296457674.pdf
    • https://www.dgs-interparts.be/sites/default/files/7838369457.pdf
    • http://spotlight-sites.com/sites/default/files/webform/jalipoxelelikepobolid.pdf
    • http://spotlight-sites.com/sites/default/files/webform/wokasonexigugeb.pdf
    • https://www.jsif.org/sites/default/files/webform/rijuluzevowogadabiwi.pdf
    • https://grossenbacher.co.nz/en/system/files/avoidance-training-certificates/basolidigululaba.pdf
    • https://www.telluridescience.org/sites/default/files/tstc-applications/30232074114.pdf
    • http://spotlight-sites.com/sites/default/files/webform/sizewavajifur.pdf
    • https://ambrose.edu/sites/default/files/webform/2306024917.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=the+ultimate+rpg+character+backstory+guide+pdf+download+free
    • https://community.princeton.edu/system/files/webform/40347257249.pdf
    • https://gradfutures.princeton.edu/system/files/webform/fumegefexuwonadijot.pdf
    • https://www.healthdata.org/sites/default/files/resumes/fanonexujezurexuli.pdf
    • https://ec.europa.eu/eip/agriculture/sites/default/files/webform/72323592377.pdf
    • https://printandmail.princeton.edu/system/files/webform/67925993666.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebe7.bin
4475f5b20c52eaec5a8dd2d7559edc870ff18241f45b949b7c4e33159d79c36d
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE7 5916 bytes