Malicious PDF — malware analysis report

Static analysis result for SHA-256 059fb62c7d646180…

MALICIOUS

PDF

47.3 KB Created: 2021-06-11 06:41:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 073af18371894bc589478641a716bfba SHA-1: 66eaa979be426ae6dfd86836fdac6b27bfa95b79 SHA-256: 059fb62c7d6461806c79f1315b8a5267fdb23b49e87bcc1cd09a75f6a2900fac
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to a malicious website, masquerading as a game hack generator. The presence of a visual download button and the overall lure suggest an attempt to trick users into visiting a potentially harmful site. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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 https://netcdn.tw/app/431946152/code-cheater-unboxing-simulator-roblox-game-hack In PDF document text
    • http://lib.stie-aub.ac.id/repository/minecraft-free-online-unblocked_GM479516143.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/minecraft-pc-download-free-full-version_GM479516143.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-32-mod-hack-unlimited_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/aristois-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-game-made-by-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-free-coins-today_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-get-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/cone-master_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-roblox-card_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/minecraft-pc-free_GM479516143.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/minecraft-cheats-pc-2021_GM479516143.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-100-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/tiktok-free-views_GM835599320.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://wolfzscriptsIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004ed4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4ED4 25572 bytes
SHA-256: 4c7ccee1869d4a50b5dd366073bf996f2df88974f75047e6594c1951e10ec144
font_01_sfnt_off00008912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8912 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off000092c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92C3 19448 bytes
SHA-256: 961657941a473101ca1be1b995b7d44a31513fc26939dffac71fbb79300e04ce

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