Malicious PDF — malware analysis report

Static analysis result for SHA-256 447e49bcffef7ac2…

MALICIOUS

PDF

33.7 KB Created: 2021-07-03 21:06:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: bf45930445a1e3486b3941b9a9aff6c7 SHA-1: 4be1dc95b393fa4b3370bd527d22be52cb2b4f97 SHA-256: 447e49bcffef7ac2e5fb873171a4f1bae809b73a024efd2709bc940ae0f524e9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with promises of game hacks and free currency, such as for Roblox. The document body and heuristics indicate a clear intent to redirect users to potentially malicious websites. No scripts were extracted, but the embedded URLs and heuristic firings strongly suggest a phishing or malware distribution workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/roblox-admin-hack-game-hack In PDF document text
    • http://library.acehresearch.org/repository/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-robux-no-inspect-2021_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-sued_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-in-cheat-ingine_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/minecraft-mojang-free_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-robux-discord_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-roblox-groups-2021_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-do-you-get-roebucks_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/robloxs-free-coloring-pages_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-get-free-robux-september-2021_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-ids-for-free-spins_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-robux-generator-free-download_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-hack-wild-savannah-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/what-player-got-banned-for-using-free-models-roblox_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/robux-for-free-pc_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-robux-for-children_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/face-added-by-hacker-roblox_GM431946152.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
font_00_sfnt_off00002d7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D7E 22068 bytes
SHA-256: bef85e34de6a96a431ef720e230e604d30eea23419ba9291b6a6194d93e1b9fa
font_01_sfnt_off00005e44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E44 19208 bytes
SHA-256: e5ca730804d66bebf4e5e52c5751bcc2b57707170b28c3b0ce40a6afaace4474

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