Malicious PDF — malware analysis report

Static analysis result for SHA-256 55d8dde2071703ad…

MALICIOUS

PDF

48.1 KB Created: 2021-06-04 03:48:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 6827c336392300811b6f8839d2d97aac SHA-1: 902d8ac6ddc7097db3e6ed17e94e8ed90740fd94 SHA-256: 55d8dde2071703ad31e58a51f6b36f33c0229d9cf35a05c9802add26c581ef09
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, masquerading as game hacks or free generators. The primary link identified is https://netcdn.online/app/479516143/minecraft-free-download-mac-full-version-2021-game-hack. This behavior is consistent with phishing or malware distribution campaigns aiming to trick users into visiting compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

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-free-download-mac-full-version-2021-game-hack In PDF document text
    • http://lib.stimykpn.ac.id//repository/minecraft-free-online_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-hack-iosgods_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-free-coins-spins_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-spins-on-coin-masters_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/was-minecraft-ever-free_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-hacks-that-work_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/roblox-free-item-codes_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-coins-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-games-hack_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/como-conseguir-monedas-infinitas-y-tiradas-de-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/how-to-change-your-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-free-spin-realme-products_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-free-daily-spins_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
stream_004_off00005759.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5759 30280 bytes
SHA-256: 8ccf227f9a19ea845501b4cbc54205da879ad26fb1c966e5f52f6694c44f715a
font_01_sfnt_off00009768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9768 18964 bytes
SHA-256: b6087cd044d66512a4bbe462cbd4c424643b24317ccde57b4a21bed9d436f387