Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cc329704d40e8d6…

MALICIOUS

PDF

48.6 KB Created: 2021-06-03 22:33:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: b325a69d0ca1d5620315315aa4c4ae21 SHA-1: f4163f025bc29ef6b65f3f49195312a38aab4790 SHA-256: 8cc329704d40e8d6cb4e19cf4109b959c906e00be183189feb59acd0bd66b93a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and game hack lures, aiming to trick the user into downloading further malicious content. The primary lure is a 'Coin Master Free Spins 2021' generator, which is a common social engineering tactic. The document's structure and embedded links strongly suggest it is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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 https://netcdn.online/app/406889139/coin-master-free-spins-2021-game-hack In PDF document text
    • http://pustaka-smpn3tpi.com//repository/hack-coin-master-apk-ios_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/roblox-hack-ios_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/master-coin-free-link_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/windows-10-minecraft-free-with-java_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/minecraft-pocket-edition-mods-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/toolbox-for-minecraft-pe-ios_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-free-login_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-to-get-minecraft-windows-10-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/coin-master-free-spins-for-iphone_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/minecraft-free-download-laptop_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/minecraft-java-free-trial_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/google-play-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000529e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x529E 25492 bytes
SHA-256: 1b54091df240f3a57b686f87727ace1a166bbdd07ac56e047e1922d8fd4ea751
font_01_sfnt_off00008cae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CAE 4280 bytes
SHA-256: b9e51513c0c0f328a6177930b0bfa25347cd218c2a3136adb2f7a16d96568e43
font_02_sfnt_off00009b2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B2D 18288 bytes
SHA-256: 9f7609fba99e53c6baa99bb04d1c7e3f9b7167131c1520eb2a413cdab4a14871

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