Malicious PDF — malware analysis report

Static analysis result for SHA-256 a18b416bc022f95a…

MALICIOUS

PDF

34.6 KB Created: 2021-07-03 11:31:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 92234518d5878c94629efe492ec84479 SHA-1: 2b18e107982211560e588042b7a8cf9b2db62d99 SHA-256: a18b416bc022f95ab5a8d7daa424ff97b8ddb06a3874796cf91bff32ee0473aa
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to websites offering "free generators" or "hacks" for games like Roblox and Coin Master. These links are identified as malicious redirectors, indicating a phishing or scam attempt to lure users to potentially harmful sites. The document's content and embedded URLs strongly suggest a social engineering tactic to trick users into clicking malicious links.

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/how-to-get-free-robux-easy-hack-game-hack In PDF document text
    • http://regiefranchet.fr/userfiles/files/coin-master-hack-2021-download_GM406889139.pdfIn PDF document text
    • http://regiefranchet.fr/userfiles/files/free-realistic-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://regiefranchet.fr/userfiles/files/rbx-robux_GM431946152.pdfIn PDF document text
    • http://regiefranchet.fr/userfiles/files/how-to-get-free-robux-2021-on-pc_GM431946152.pdfIn PDF document text
    • http://regiefranchet.fr/userfiles/files/pastebin-free-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://regiefranchet.fr/userfiles/files/roblox-cheat-enginefor-rodebix_GM431946152.pdfIn PDF document text
    • http://regiefranchet.fr/userfiles/files/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://regiefranchet.fr/userfiles/files/roblox-free-admin-script_GM431946152.pdfIn PDF document text
    • http://regiefranchet.fr/userfiles/files/how-to-get-free-spins-on-coin-master-android_GM406889139.pdfIn PDF document text
    • http://regiefranchet.fr/userfiles/files/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • http://regiefranchet.fr/userfiles/files/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://regiefranchet.fr/userfiles/files/hack-roblox-hack-free_GM431946152.pdfIn PDF document text
    • http://regiefranchet.fr/userfiles/files/coin-master-spin-link-free_GM406889139.pdfIn PDF document text
    • http://regiefranchet.fr/userfiles/files/today-free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://regiefranchet.fr/userfiles/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://regiefranchet.fr/userfiles/files/codes-for-free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • http://regiefranchet.fr/userfiles/files/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://regiefranchet.fr/userfiles/files/free-robux-website-no-human-verification_GM431946152.pdfIn PDF document text
    • http://regiefranchet.fr/userfiles/files/roblox-svg-free_GM431946152.pdfIn PDF document text
    • http://regiefranchet.fr/userfiles/files/hacks-for-roblox-case-clicker_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_off00002f85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F85 22384 bytes
SHA-256: a74401f33ededf2137faff826e9426ff6b3d4273c1fe3590ff5c8cd672c76e0b
font_01_sfnt_off0000614d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x614D 19336 bytes
SHA-256: 78f916c03dd9b91bc5a9b0fe28cce5081736cfe4fe32979dd63f9f8a24f066e1

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