Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3b09c3be1489a31…

MALICIOUS

PDF

35.6 KB Created: 2021-07-05 18:34:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: ab64ea188b47a8e01b417206fac28601 SHA-1: 0b0617401100d292f7e3bf92acfce534fc5bf33d SHA-256: c3b09c3be1489a313992b7bb3cad036187296a4875994d7c4650ad3a55eb2035
160 Risk Score

Malware Insights

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

This PDF document employs a common lure of free game hacks and currency to trick users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, which likely serves further malicious content or exploits. The document's content and embedded URLs strongly suggest a phishing or scam attempt designed to lead users to potentially harmful sites.

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-hack-peoples-roblox-accounts-game-hack In PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-spin-realme-products_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/play-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/gross-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-not-a-scam-or-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-spins-coin-master-links-thursday-november-28-2021_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-free-hair-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-hack-into-my-roblox-account_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-roblox-obby_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/games-like-minecraft-but-free_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-phantom-forces-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-robux-with-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/minecraft-build-hacks_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-face-roblox_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-gift-card-roblox-codes_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/hacking-robloxs-account_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-promo-code-generator-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/hackear-juego-coin-master_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
font_00_sfnt_off000032d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32D5 22460 bytes
SHA-256: 82b7d84904e57d17c63e4df8bdea00b455e070d0aad4c7a6468cfc7653c71a9c
font_01_sfnt_off000064d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64D6 19392 bytes
SHA-256: 455054d53819942057d20be51cc97c11c8340df0e33a1662ffdae35838096838

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