Malicious PDF — malware analysis report

Static analysis result for SHA-256 b01e4076eb286121…

MALICIOUS

PDF

35.9 KB Created: 2021-07-05 23:48:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 727cfef25a86aa24071eb7f992c0af93 SHA-1: d83598c5fefe1a4c4fccff3ba81f21b45575b605 SHA-256: b01e4076eb28612192d4ed2c5c5c83a97700a7b7916383ee35c8de2f5ed90100
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically advertising a "free generator / game hack". The embedded document body text and numerous extracted URLs reinforce this lure, pointing towards various game-related hacks and cheats. While no scripts were extracted, the primary attack vector appears to be social engineering via a malicious link, likely leading to further malware download or phishing.

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/406889139/master-free-spin-game-hack In PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-ios-hack_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-executor-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/get-free-tiktok-likes_GM835599320.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/tiktok-free-skin-event_GM835599320.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-admin-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-roblox-accounts-dantdm_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-change-your-name-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-clothes-that-are-good-on-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-form-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/can-you-really-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-do-you-earn-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-admin-hack-adopt-and-raise-a-cute-kid_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-unlimited-spin-hack_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-roblox-downloader_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-dragon-ball-super-2-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/play-games-online-free-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-salvage-hack_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_off0000379c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x379C 22816 bytes
SHA-256: 42fbaa9df9a0b5f62f98e9fd1389ef3d5a686fe76549f3f7d293a21cc3678be1
font_01_sfnt_off00006a9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A9B 18032 bytes
SHA-256: b83729afdc19971bf6a9527ae38a1fe34cd1a27a07ca5c3ae75379af816a88cf

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