Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa633e7b9405e173…

MALICIOUS

PDF

235.6 KB Created: 2021-07-06 18:08:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 4c3d7f6fb3edea73f978c31101cb2ae3 SHA-1: ff8e7677c64deddca180d5b60759a347859437e7 SHA-256: fa633e7b9405e1735a3f3ea71c870312eb623b84952a1e52fbaa76e5110cc754
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple links to a known malicious redirector infrastructure, specifically advertising 'free generator / game hack' lures. The primary URL identified is http://netcdn.tw/app/1330123889/pubg-uc-malaysia-murah-game-hack. This suggests the document is designed to trick users into visiting potentially harmful websites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2562

Heuristics 3

  • 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.
  • 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/1330123889/pubg-uc-malaysia-murah-game-hack In PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-minecraft-com_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/pastebin-free-robux-hack-no-wait_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/work-in-a-pizza-place-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-hack-2021-november_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/robux-for-roblox-free-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-roblox-treasure-hunt-app_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-speed-hack-script-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/game-give-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/murder-island-hack-roblox-script_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/compile-roblox-hack-dll_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/robux-hacks-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-hack-a-person-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-roblox-hack-mad-city_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/hack-de-fly-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-roblox-without-download_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/actually-free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-free-robux-on-roblox-with-proof_GM431946152.pdfIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_024_off00037d94.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x37D94 20099 bytes
SHA-256: a944ac547450d235212455240823ff81d350d7eb6c54ebc5ce55e7fe99ad2bed