Malicious PDF — malware analysis report

Static analysis result for SHA-256 a936d838d5fdaec4…

MALICIOUS

PDF

54.7 KB Created: 2021-04-13 12:44:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7dd043a6f9ab5f28486c75af1debb565 SHA-1: d339776830f97737f6d10fb1fbea745641f359fa SHA-256: a936d838d5fdaec47f7e81d7ed2e3bd0a8989d0192165cebf5b2cd6a5d945107
124 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and is flagged by multiple heuristics, including a ML classifier and ClamAV, as malicious and phishing-related. The document body, though heavily obfuscated, contains references to 'Mortal Kombat X' and 'torrent', suggesting a lure to trick users into downloading malicious content. The presence of external URIs and the overall structure indicate an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8235

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://www.pbttphtk.gov.my/sites/default/files/webform/1232685222.pdf
    • http://www.grotekeukens.be/sites/default/files/webform/gmawards2018/48103714077.pdf
    • https://www.enwidth.com/sites/default/files/webform/resumes/wefegazeketalewawer.pdf
    • https://www.natsihwa.org.au/sites/default/files/webform/tesogiruzan.pdf
    • https://ambrose.edu/sites/default/files/webform/zabufenopi.pdf
    • http://cicatsalud.com/html/sites/default/files/webform/68038126183.pdf
    • https://ambrose.edu/sites/default/files/webform/juremetepatofuf.pdf
    • http://www.pacificsportfraservalley.com/sites/default/files/webform/12938533755.pdf
    • https://www.uts.cw/sites/default/files/webform/96040264728.pdf
    • http://oaklandchildcare.org/sites/default/files/webform/bidepe.pdf
    • https://www.pharoxglobal.com/sites/default/files/webform/70645978292.pdf
    • https://europa-ts.ru/sites/default/files/webform/sujeludepotunebimetoravij.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=mortal+kombat+x+ps3+torrent
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7af.bin
22d8fb08fec7cc79c098327a876c15ddc39c12ac9ba9bee32a338e27fd76c5b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC7AF 5408 bytes

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