Malicious PDF — malware analysis report

Static analysis result for SHA-256 5225c6f603bc41ac…

MALICIOUS

PDF

33.7 KB Created: 2021-07-03 21:48:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: b1f691fff5922a51431c130fa7b2008b SHA-1: 629ebd32f27c717a36c515238b78d5ff524102ea SHA-256: 5225c6f603bc41acc9efd35e446134fd1d4fa508045849b5048497a1cef9bcc3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirector infrastructure, specifically advertising free game currency and hacks. The primary lure URL is http://netcdn.tw/app/431946152/free-robux-with-no-human-verification-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack designed to lead users to potentially malicious websites.

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/431946152/free-robux-with-no-human-verification-game-hack In PDF document text
    • http://shoruq.sch.ae/userfiles/files/coin-master-gameplay_GM406889139.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/how-to-hack-coin-master-game-without-root_GM406889139.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/rbxvault-free-robux_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/free-robux-online-generator_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/roblox-build-a-boat-for-treasure-hack-script_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/free-roblox-places-download_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/how-to-get-minecraft-bedrock-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/free-minecraft-coins_GM479516143.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/daily-free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/unlimited-spin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/roblox-jailbreak-hack-download-ios_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/game-api-free-robux_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/how-to-get-free-robux-copy-and-paste_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/accounts-with-robux-free-rocash_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002c9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C9D 21852 bytes
SHA-256: 6c909f813ec3737e6dc32aa8c062d849ffbb7d55d18130801c73e1e96ef2f487
font_01_sfnt_off00005cdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CDC 19700 bytes
SHA-256: 35e501b9c45e5927f0fc62a5ada2d4fbbc4f1128da3636f490de4bd32383e5b5

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