Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cd96ec6d0b687ce…

MALICIOUS

PDF

35.3 KB Created: 2021-07-05 22:14:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 7bf7b33bd41e17e7be07518be51d9178 SHA-1: d2764884bf852e42458ba7830d798563e7055630 SHA-256: 9cd96ec6d0b687ce10130d282563554ff132be0ce45d08bf6b3f7ee595221f15
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a call-to-action phrase, explicitly luring users with promises of 'Free Robux' and game hacks. The primary link, http://netcdn.tw/app/431946152/free-robux-that-actually-works-2021-game-hack, is identified as a redirector, suggesting it leads to a malicious site. While no scripts were directly extracted, the PDF structure and heuristic firings indicate a social engineering tactic to drive users to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/free-robux-that-actually-works-2021-game-hack PDF link annotation
    • http://katalog.ireyogya.org/repository/free-roblox-accounts-pastebin-2021_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/real-free-robux-games-2021_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-coin-master-spins-links-2021_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-get-free-robux-no-hack-or-human-verification_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-get-all-gamepass-items-in-roblox-nypd-free_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-hack-people-on-roblox-easy-exploit_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/roblox-hack-2021-free-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/roblox-sad-cheating-story_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/robux-today_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/roblox-free-80-robux_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-robux-instant-hack_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/roblox-free-packages-download_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-change-the-name-of-free-morphs-on-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/best-free-roblox-level-7-full-lua-eecutor-august-2021_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-hack-roblox-on-ipad-2021_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/fb-coin-master-hack_GM406889139.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_002_off00002fd9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FD9 22372 bytes
SHA-256: ca354c2fcfab76ab602e76ea13502623eba5df865e14d477a20a6ce5c9f8a528
font_01_sfnt_off000061cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61CB 20008 bytes
SHA-256: 8708610d65edee27054ce301a9bd75c7c559fd6231599c341fc0984ebcbede77

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