Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7ac80986436d4a3…

MALICIOUS

PDF

33.9 KB Created: 2021-07-06 21:29:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 9fb02bdea1cd040dbe7cc34d29677a76 SHA-1: a126ed533bb4e077af9db24293790bdc456952ba SHA-256: c7ac80986436d4a3f7b97919ce8777d31a3253c9d09ec6991db3dc408a664662
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a critical heuristic firing for a game hack redirector lure, pointing to malicious infrastructure. The document body and embedded URLs reinforce this by referencing game-related terms and linking to suspicious domains. While no scripts were explicitly extracted, the nature of the lure suggests it is intended to lead the user to a site that may host further malicious content or exploit.

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/coin-master-village-3-game-hack In PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/auto-clicker-free-roblox-shinobi-life_GM431946152.pdfIn PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/coin-master-free-spins-5-10-2021_GM406889139.pdfIn PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/bloxfun-info-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/is-minecraft-free-on-mac_GM479516143.pdfIn PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/watch-videos-for-robux_GM431946152.pdfIn PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/how-to-hack-roblox-accounts-2021-december_GM431946152.pdfIn PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/coin-master-free-spins-2021-app-download_GM406889139.pdfIn PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/roblox-bundles-free_GM431946152.pdfIn PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/minecraft-free-download-android_GM479516143.pdfIn PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/girl-roblox-avatar_GM431946152.pdfIn PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/get-robux_GM431946152.pdfIn PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-mobile_GM479516143.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
stream_002_off00002f21.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F21 22568 bytes
SHA-256: afde8c7898f04e18643517199891e2b7e7275da4ab64b8e7f417a159437f83b0
font_01_sfnt_off000061c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61C1 18216 bytes
SHA-256: 013099061882cabe4a5b28fedff039c183f142ba80ad6529ed5e41c5d5229a73

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