Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f7e549122f27bb7…

MALICIOUS

PDF

33.8 KB Created: 2021-06-26 09:36:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: f92b12403a2ff0b0fd66bb1089d9b0e7 SHA-1: 98bc86020fe8b5776644cf2827afff5b6b866887 SHA-256: 8f7e549122f27bb7c30340fd02cbc529ccb76d71278eaae3826726f0b74a1b51
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple links to redirectors, including one identified as malicious infrastructure. The document body and heuristics suggest a lure for game-related cheats or generators, aiming to trick users into clicking these links. The presence of a visual download button further supports the deceptive nature of the document.

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.co/app/431946152/telecharger-roblox-hack-game-hack In PDF document text
    • http://cintabaca.org/katalog/repository/withdraw-robux_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/free-robux-earn_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-free-cards-link-2021-today_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-tiktok-like_GM835599320.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/minecraft-free-apk_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/how-to-robux_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/free-back-accessories-roblox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-hack-download-windows-10_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-free-followers-bot_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/avatar-de-roblox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/tiktok-free-view-iphone-wallpaper_GM835599320.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-free-spin-and-coins-links-home_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-online_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/100-free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/hack-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-coins_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/unlimited-spin-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
font_00_sfnt_off00002e5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E5C 22240 bytes
SHA-256: 7061631a3257475596b70dc726851a29b52528ff9a5c68ed0faa62f2218cc4b1
font_01_sfnt_off00005fde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FDE 18820 bytes
SHA-256: 4cf6c577826cb657f933ecc146f54e3de60b508441e4cc788fd120723ee10def

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