Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b9d9b22e4aa2f58…

MALICIOUS

PDF

33.6 KB Created: 2021-07-03 21:17:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 70b037738e47f4daacbb0081a4d56bdd SHA-1: 7feeb1ad5153ace5bafd616d1005faeacef64808 SHA-256: 8b9d9b22e4aa2f587b4c366a52d8d463e53b385275b9692ac70df483c3f60bc5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, disguised as offers for free game items and hacks. The primary lure URL is http://netcdn.tw/app/479516143/free-minecraft-skins-pe-game-hack. This suggests the document's purpose is to redirect users to potentially malicious websites that could lead to malware downloads or further phishing attempts.

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/479516143/free-minecraft-skins-pe-game-hack In PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/youtube-roblox-cheat-engine-arcane-adventures_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-fan-page-facebook_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/inappropriate-roblox-games-2021_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/robloxs-got-talent-hack_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/robux-hacking-website-no-verification_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-get-free-tiktok-fans_GM835599320.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/play-roblox-free-online_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/minecraft-pe-017-0-apk-free-download-android_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/minecraft-realms-free-codes_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-hack-ios-download_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/daily-free-coin-and-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-robux-please_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/minecraft-client_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/roblox-how-to-buy-robux-for-free_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_off0000309c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x309C 21912 bytes
SHA-256: edb4c302cb726ded8c69d51ab3942feeb4db9f98c925bbdd693db4e0687397cb
font_01_sfnt_off000060fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60FC 18180 bytes
SHA-256: 03bbaca276f4ce07c12aa831bba89cfcc4ebeeef430a8e21d06434038c5cc938