Malicious PDF — malware analysis report

Static analysis result for SHA-256 05bb10abf3a0d978…

MALICIOUS

PDF

34.3 KB Created: 2021-07-05 16:59:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 6444d301bf53841f1a67f4cc80043635 SHA-1: 0eb112e5fa266c9826c318ebf5ea2bc2578b623e SHA-256: 05bb10abf3a0d97847719b24ddfa4eeb26b89027d87e10a616b7f50bd53cbfac
160 Risk Score

Malware Insights

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

The PDF document contains multiple links to known malicious redirectors, disguised as game hack generators and free currency offers. The primary redirector URL is http://netcdn.tw/app/406889139/how-to-get-more-spins-on-coin-master-game-hack. This indicates a social engineering attack aimed at tricking users into visiting malicious sites, likely to download further malware or engage in phishing. No scripts were extracted, but the PDF structure and embedded links strongly suggest exploitation for client execution.

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-more-spins-on-coin-master-game-hack In PDF document text
    • http://perpus.masda.ac.id//repository/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/robux-game_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-fun-hack-online_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/hacks-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-sites-v3rmillion_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-hack-ios-app_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-free-robux-code-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-login-hack_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-gold-cards-free-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/clean-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/money-cheat-retail-tycoon-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-actaully-hacks-on-roblox-not-a-model_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-free-spins-hack-but-no-surveys_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-stuff-to-buy-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/village-coin_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/robux-free-online_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-game-hack_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/pubg-uc-olx_GM1330123889.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-roblox-executor-no-key_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-roblox-script-executor_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_off00003154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3154 22512 bytes
SHA-256: 9161a63730c10a20181371c0b682aceb0964aee092b23716aae6cec4042c22d8
font_01_sfnt_off0000636e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x636E 18176 bytes
SHA-256: 072a98bed821139b72faa0857d5d79503d06e00f528252fbc36dcee34d4ba15f

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