Malicious PDF — malware analysis report

Static analysis result for SHA-256 f66337d1894843a6…

MALICIOUS

PDF

46.2 KB Created: 2021-06-04 03:27:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 7a140c9a22c1fd2a2649c85d302a1937 SHA-1: 0ca59994133a9d60164f7c53d57edf57271e1976 SHA-256: f66337d1894843a68cb3a30b96d5d0ce77b6b336bbf60eb2526c5a2f30d59694
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded URLs that redirect to sites offering game-related cheats and downloads, identified as malicious redirectors. The document body, though partially corrupted, contains text and URLs consistent with a lure for free in-game items. The primary malicious URL is https://netcdn.online/app/479516143/minecraft-apk-download-free-11-055-game-hack, which is flagged by heuristics as a known malicious redirector. No scripts were extracted, but the document's structure and embedded links strongly suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.online/app/479516143/minecraft-apk-download-free-11-055-game-hack In PDF document text
    • https://digilib.stimlog.ac.id/repository/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-minecraft-worlds_GM479516143.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-pics_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-minecraft-mods_GM479516143.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/mcpe-com_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/100-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-roblox-adopt-me-accounts_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/wurst-18-9_GM479516143.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-make-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/minecraft-server-free-trial_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/minecraft-pe-free-download-ios_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-hack-2021-without-human-verification_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/android-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_off0000567e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x567E 25684 bytes
SHA-256: cf196812a0218eed3fd302c009d4f5cf2db54a2097ce50aaa3c3936c023f4937
font_01_sfnt_off00008fd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FD9 19048 bytes
SHA-256: 3d5d189bc7372af2b38a52366ba09077ddd1bccc7012633974f676ffe4a68d99

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