Malicious PDF — malware analysis report

Static analysis result for SHA-256 076f0638862b1bb9…

MALICIOUS

PDF

35.0 KB Created: 2021-06-20 12:35:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: c17defab2ff1f0a70dc39eac873f19d8 SHA-1: 16810e645f9fa3bc543e0f44395015a21ef3fe9c SHA-256: 076f0638862b1bb9b5d832ed2d48cf471217a04e6a112906c44fa440494a777f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with promises of free in-game items. The document body and heuristics indicate a social engineering tactic to drive users to external sites, likely for further malware delivery or phishing. No scripts were extracted, but the presence of malicious links and redirectors is a strong indicator of malicious intent.

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/431946152/roblox-bubblegum-simulator-cheats-game-hack In PDF document text
    • http://lib.vipklh.ru/repository/how-to-get-free-skins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-daily-free-spins-link-today-blog_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/robux-gainer_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-spins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/minecraft-windows-10-code-free_GM479516143.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/roblox-cheat-engine-bypass-2021_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/how-to-get-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/roblox-robux_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-attack-madness-hack_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-roblox-private-servers_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-robux-master_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/how-to-hack-games-on-roblox-rpg-rainbow-swords-rpg_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/hack-coin-master-using-cheat-engine_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/hello-neighbor-free-play-roblox_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-server-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_off00003158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3158 22404 bytes
SHA-256: 130c3b8060a76d7ed4764d612e14372c7f3e5d7ffe9e8abb7b40b80877f9d23f
font_01_sfnt_off00006352.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6352 19276 bytes
SHA-256: 8fdf406d633ab7f565beb401e3bfed628959c6158a7a527d8746347fe28f1111

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