Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7b6dff9a1485f58…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 15:53:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: e7be96f0c6043beaa773d6ef4d850374 SHA-1: 694f862325e2850426a2acca5f228a8caf26330b SHA-256: c7b6dff9a1485f589fe7498df659476309d18b1aa10bb0a051adae63d6915417
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a game hack redirector lure, pointing to a URL that is also flagged as malicious infrastructure. The document body contains the same URL, reinforcing the lure. While no scripts were extracted, the PDF structure and embedded links strongly suggest a phishing attempt to redirect users to potentially malicious content.

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/coin-master-free-spins-and-coins-for-today-game-hack In PDF document text
    • http://lib.untad.ac.id/repository/https-www-roblox-com-games-2021202156-free-bux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/codes-to-get-free-money-on-roblox-treasure-hunt-simulator_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-free-robux-on-safari_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-free-robux-easy-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-viking-quest-hack_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/neon-hacks-roblox-account-generator_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-robux-hack-2021-no-survey-no-download_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-scam-copy-and-paste_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/hack-roblox-players_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-roblox-wings_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/the-society-of-magic-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/minecraft-pe-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-gear-from-games-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/get-your-free-robux-today_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-free-robux-kindle-fire_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-slender-mans-revenge-reborn-hack-script_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-realistic-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/krnl-download_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/wwwhaktutsin-2021-08-coinmasterfreespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-codes-no-verification_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_off000030d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30D6 22828 bytes
SHA-256: 5d392f4a2b9a57f4ef45080134c99323637f8e260641c85ea27cc029a3babc51
font_01_sfnt_off00006436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6436 18528 bytes
SHA-256: 64e6d113bd97b02afb7632d7b1c85a61d3fc47f14b318ce8b72a94cd305839a3

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