Malicious PDF — malware analysis report

Static analysis result for SHA-256 42b123598bf8c8b6…

MALICIOUS

PDF

41.0 KB Created: 2021-04-29 06:40:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 1fed5b74a60154c79282711b4254e456 SHA-1: fbdf0088569d46301bc7d6ca02bb4bf352f0d1f1 SHA-256: 42b123598bf8c8b60fb9557fd8019e3b7631bf5ae5731e4a1002873e060f2cf3
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to game hacking, specifically for Roblox, directing users to a suspicious URL. The presence of multiple embedded URLs and a high ML classifier score indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to potentially malicious content or downloads.

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/how-to-hack-roblox-jailbreak-keycard-game-hack PDF link annotation
    • https://www.bolsoshf.com/ckfinder/userfiles/files/roblox-group-free-clothes.pdfIn PDF document text
    • https://www.bolsoshf.com/ckfinder/userfiles/files/roblox-noclip-no-cheat-engine.pdfIn PDF document text
    • https://www.bolsoshf.com/ckfinder/userfiles/files/roblox-free-purple-hat.pdfIn PDF document text
    • https://www.bolsoshf.com/ckfinder/userfiles/files/uirbx-club-free-robux.pdfIn PDF document text
    • https://www.bolsoshf.com/ckfinder/userfiles/files/free-roblox-new-hood.pdfIn PDF document text
    • https://www.bolsoshf.com/ckfinder/userfiles/files/free-gamepass-roblox-script-not-patched.pdfIn PDF document text
    • https://www.bolsoshf.com/ckfinder/userfiles/files/how-to-hack-roblox-catalog.pdfIn PDF document text
    • https://www.bolsoshf.com/ckfinder/userfiles/files/cheats-fro-csgo-in-roblox.pdfIn PDF document text
    • https://www.bolsoshf.com/ckfinder/userfiles/files/roblox-walk-through-walls-cheat-engine-jailbreak.pdfIn PDF document text
    • https://www.bolsoshf.com/ckfinder/userfiles/files/how-to-make-a-free-robux-hack.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_off0000414b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x414B 26092 bytes
SHA-256: ea6ffd5ffec3451f75592c671e101927f6bfe6057312048abebbf01eb92221ee
font_01_sfnt_off00007c1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C1F 18984 bytes
SHA-256: a0da8c50f17010c799ed89e2a88af02b829a48503fd5f3c1eb9af711f2b8b69b

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