Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0b72b6c6c1406f6…

MALICIOUS

PDF

35.5 KB Created: 2021-07-01 17:24:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 40fa08964304e7c17558d64b3a84fa16 SHA-1: 10ead1313f8b573b5cf623a162162fded0237a94 SHA-256: c0b72b6c6c1406f649522a0e931175b8ed1dcd8070d1a38d491809f22801157d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, including a known malicious redirector, that are presented as game hacks or generators. The document body and heuristics indicate a lure to trick users into clicking these links, likely leading to further malicious content or downloads. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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.co/app/406889139/coin-master-claim-spins-game-hack In PDF document text
    • http://licko.cz/files/roblox-how-to-get-free-clothes-2021_GM431946152.pdfIn PDF document text
    • http://licko.cz/files/how-to-get-minecraft-for-free-on-android-device_GM479516143.pdfIn PDF document text
    • http://licko.cz/files/best-way-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://licko.cz/files/free-roblox-generator_GM431946152.pdfIn PDF document text
    • http://licko.cz/files/minecraft-apk-free-download_GM479516143.pdfIn PDF document text
    • http://licko.cz/files/free-robux-obby-roblox-game_GM431946152.pdfIn PDF document text
    • http://licko.cz/files/optifine-pe_GM479516143.pdfIn PDF document text
    • http://licko.cz/files/roblox-free-items-2021_GM431946152.pdfIn PDF document text
    • http://licko.cz/files/free-draw-roblox_GM431946152.pdfIn PDF document text
    • http://licko.cz/files/android-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://licko.cz/files/free-robux-sin-vertificacion_GM431946152.pdfIn PDF document text
    • http://licko.cz/files/500-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://licko.cz/files/claim-box-free-robux_GM431946152.pdfIn PDF document text
    • http://licko.cz/files/free-roblox-girl-hair-not-a-model_GM431946152.pdfIn PDF document text
    • http://licko.cz/files/rpg-world-hack-roblox_GM431946152.pdfIn PDF document text
    • http://licko.cz/files/can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://licko.cz/files/free-games-like-minecraft_GM479516143.pdfIn PDF document text
    • http://licko.cz/files/how-to-hack-roblox-catalog_GM431946152.pdfIn PDF document text
    • http://licko.cz/files/roblox-speed-hack-cheat-engine_GM431946152.pdfIn PDF document text
    • http://licko.cz/files/get-free-spins-on-coin-master_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
stream_002_off0000332d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x332D 23360 bytes
SHA-256: e14de04b1b96488c308e280ce353cd9721485a319217cef5d68fb2fbfc258cc5
font_01_sfnt_off000067d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67D6 18344 bytes
SHA-256: d8cccda057f64c947ab6ae0a87057660c374c9b091fe16e0f35107dc7c5d8ca5

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