Malicious PDF — malware analysis report

Static analysis result for SHA-256 b88514b8db0716b6…

MALICIOUS

PDF

34.5 KB Created: 2021-07-03 19:07:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: e620e9f6e5f6ce831895b6da833af32f SHA-1: 0b406fe731ff121b1cb2d9765b948f9fb729db03 SHA-256: b88514b8db0716b6f65a5f63a70fac40d82e4a49d01a8379c91c5697b7b3c019
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and lures users with promises of game hacks and free currency. The primary malicious URL identified is http://netcdn.tw/app/406889139/twitter-coin-master-free-spins-link-game-hack. The document's structure and embedded links strongly suggest a phishing or scam attempt designed to lead users to potentially harmful 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/406889139/twitter-coin-master-free-spins-link-game-hack In PDF document text
    • https://www.zagorjeadventureteam.hr/files/how-to-hack-roblox-games-2021_GM431946152.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/free-roblox-clothes-and-hair_GM431946152.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/hack-a-game_GM431946152.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/free-roblox-decal_GM431946152.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/how-to-make-a-minecraft-server-for-free-java_GM479516143.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/minecraft-java-free-download_GM479516143.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/como-hackear-el-juego-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/real-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/free-minecraft-alts_GM479516143.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/how-to-use-cheat-engine-64-roblox_GM431946152.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/coin-master-card-collection-hack_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000316d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x316D 22364 bytes
SHA-256: 822904d3422430250b86b54f897719a725718f03d679e032acf337509d455fcc
font_01_sfnt_off00006339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6339 18508 bytes
SHA-256: e996a1c2c749d06335181f09e39a80fe94a553a11d6c3868ca1e004cbb72c640

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