Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d1151ed358b2d62…

MALICIOUS

PDF

40.8 KB Created: 2021-04-22 16:34:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 710502a4043c58a6aebb8a259d47a53d SHA-1: 9137092a8d0c270cf41d0e1015237c4ef42999a0 SHA-256: 2d1151ed358b2d62d7fd6e88bb90e861b094ff68cbe3fb21cf424c0b5e908c87
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://netsecure.pro/app/431946152/roblox-download-free-microsoft-game-hack PDF link annotation
    • http://colsaf.co/images/free-money-glitch-on-roblox-on-car-simulator.pdfIn PDF document text
    • http://colsaf.co/images/how-do-you-hack-people-on-roblox.pdfIn PDF document text
    • http://colsaf.co/images/roblox-free-exploits-2021.pdfIn PDF document text
    • http://colsaf.co/images/roblox-free-radio.pdfIn PDF document text
    • http://colsaf.co/images/on-roblox-how-do-you-hack.pdfIn PDF document text
    • http://colsaf.co/images/roblox-free-redeem-card.pdfIn PDF document text
    • http://colsaf.co/images/oblivion-hack-roblox-download.pdfIn PDF document text
    • http://colsaf.co/images/free-games-with-gamespasses-roblox.pdfIn PDF document text
    • http://colsaf.co/images/how-to-hack-money-systems-on-roblox-tycoons.pdfIn PDF document text
    • http://colsaf.co/images/is-roblox-downloadable-on-ps4-for-free.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00003ed4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3ED4 26388 bytes
SHA-256: d17ca1b09610c07b498c18fe59eed8d04949a397e4a71ac3648f63b8dc477a87
font_01_sfnt_off00007b31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B31 19104 bytes
SHA-256: 0520baa76025c73c02145272087062a8885b67b76c1f17564ad4fac8a3fb17cf

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