Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9af5439cb3a24e5…

MALICIOUS

PDF

42.5 KB Created: 2021-04-28 00:06:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: d8f0b3a970dbde983fc989f2aa973406 SHA-1: b697651b998f203820a92b5292172883ef33675c SHA-256: b9af5439cb3a24e52755ef506c2dfadf300da2514b511825566951b60c1ea2c3
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a lure related to game hacks, specifically for Roblox, directing users to a URL that likely hosts a malicious payload. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates this intent. While no scripts were extracted, the document's structure and embedded URLs suggest it's designed to trick users into downloading potentially harmful content.

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://netcdn.xyz/app/431946152/roblox-wipeout-beta-hack-game-hack PDF link annotation
    • http://sd-olimp.hr/files/roblox-how-to-make-a-slient-aim-hack.pdfIn PDF document text
    • http://sd-olimp.hr/files/roblox-twisted-murderer-hack-nopde-engine.pdfIn PDF document text
    • http://sd-olimp.hr/files/how-to-become-a-hacker-on-roblox-jailbreak.pdfIn PDF document text
    • http://sd-olimp.hr/files/hacks-for-booga-booga-in-roblox.pdfIn PDF document text
    • http://sd-olimp.hr/files/roblox-hack-scripts-free.pdfIn PDF document text
    • http://sd-olimp.hr/files/free-fortnite-robux-hack.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/easy-free-robux-in-roblox.pdfIn PDF document text
    • http://sd-olimp.hr/files/how-to-hack-sketch-on-roblox.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/free-money-in-roblox-rocitizens.pdfIn PDF document text
    • http://sd-olimp.hr/files/free-robux-ohne-handynummer-2021.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_off00004208.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4208 28720 bytes
SHA-256: d55b18c7a825168893cce1f29994535997ec21981378b37e291a4fb43fa97c2b
font_01_sfnt_off00008299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8299 18920 bytes
SHA-256: f7d219ed8907ac0cbb60aff500cc8431a1c7fe8bed79cb882ef43971ee053d1d

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