Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cbfc8c8220b2b4b…

MALICIOUS

PDF

34.4 KB Created: 2021-07-05 13:32:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 3b15e50ffefbf5085de9997cd70ae2e6 SHA-1: 6c673de9f70f5defae6bebd64227acbf899b921c SHA-256: 6cbfc8c8220b2b4be9604b47b440d3c7010706ec8d4c828924ea92759f85962e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to a redirector infrastructure that is known to host malicious content, specifically lures for game hacks and free currency generators. The document body and heuristics confirm the intent is to trick users into visiting these malicious URLs, likely leading to malware download or further compromise. No scripts were extracted, but the embedded URLs and heuristic firings strongly indicate a phishing or social engineering attack.

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-free-spins-hack-iphone-game-hack In PDF document text
    • http://library.unissula.ac.id/fk//repository/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-app_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-to-get-free-robux-easy-on-iphone-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-el-tiger-card-free_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/gengreating-free-roblox-redeem-codes_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-free-robux-july-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/coin-master-game-hack-version-download_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-hack-download-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/games-with-free-segway-roblox_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-hack-fast_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/is-minecraft-vr-free_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/coin-master-free-spins-hack-ios_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/elysium-bros-free-robux_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/bit-slicer-roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-free-spins--coins-2021_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-coins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/roblox-fly-script-cheat-engine_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-hack-online-no-human-verification_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_off00003048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3048 22984 bytes
SHA-256: 8dcddc1470e44b90df3bf9d43f5778369fa6c51727273bc9e73cb18a1ed09669
font_01_sfnt_off00006376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6376 18512 bytes
SHA-256: f42da8955ac0b14df7498282519dbf61ee386aa1420e52cc2fe2324e7f413181

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