Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c46fe48ab4adb7b…

MALICIOUS

PDF

35.1 KB Created: 2021-07-04 08:28:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: fff7a03c87452019fac280b29f87761d SHA-1: 96f50291eb0e28af523dca387908d30dcc6c2c2e SHA-256: 9c46fe48ab4adb7b88cbd827940124329335178cbc6b0ab591fef570a391d249
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains links to a malicious redirector masquerading as a game hack generator, which is a common lure for phishing or malware distribution. The ML classifier strongly supports the malicious verdict. No scripts were extracted, but the embedded URLs and heuristic firings indicate a high likelihood of user redirection to a malicious site, potentially leading to further compromise.

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/how-to-get-free-spins-on-coin-master-blogspot-game-hack In PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-free-spins-hacktman_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-super-easy-and-very-quick-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-hack-roblox-jailbreak-on-mobile_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/cheat-roblox-super-power-training-simulator-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-websites-for-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-foxy-food-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-online-roblox-water-park_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/get-free-robux-no-human-verification-or-download_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-make-a-dll-hack-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-coin-master-spins-no-verification_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-dll-hacks-for-free_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-change-username-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/40-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/why-wont-cheat-engine-work-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-3d-modeling-software-for-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-hack-ios-download_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/ss-hub-free-roblox_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_off00003254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3254 22920 bytes
SHA-256: e65865c2ff3f9d217a07fb474bc7a088403f26d832b869ab038726eb9054acad
font_01_sfnt_off00006585.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6585 18628 bytes
SHA-256: ae3a975d5d5b6b59e53d049ff91e6030f04995f7480aa257ae690626f2897a83

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