Malicious PDF — malware analysis report

Static analysis result for SHA-256 a05989573a4aa822…

MALICIOUS

PDF

37.2 KB Created: 2021-07-09 07:16:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 6fb64f0ba6dcbf609306f18da34379fc SHA-1: be69c39897a20589ffceb9c0e0fa37f625f6c95e SHA-256: a05989573a4aa822f77e1bb8ad81b45666ac0225c64ed43ae81ee7d0e260b7fb
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is designed as a lure, presenting itself as a generator for game hacks and free currency. It contains multiple links to malicious websites, including one that uses an IP address directly and another that points to a known malicious redirector. These links likely lead to further malicious content or downloads, such as the additional PDF files found in the analysis.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

Heuristics 5

  • 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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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/free-spins-coin-master-daily-game-hack In PDF document text
    • http://110.232.83.89/slimsppks/repository/robux-apk_GM431946152.pdfPDF link annotation
    • http://110.232.83.89/slimsppks/repository/coin-master-hack-using-cheat-engine_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/redeem-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/minecraft-free-online_GM479516143.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-tiktok-accounts_GM835599320.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/roblox-sexually_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-400-spin-link-today_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/mc-the-miner-free-robux_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/hack-roblox-robux-2021_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/tiktok-free-likes-net_GM835599320.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-cracked-apk-free-download_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-robux-gen_GM431946152.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
font_00_sfnt_off0000310a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x310A 22596 bytes
SHA-256: 31fedc0104bae5dfac7c1afa2dc1dc0b3ac51409cd8ac3c305bb764ddf3b1711
font_01_sfnt_off0000639e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x639E 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off00006d83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D83 18596 bytes
SHA-256: 5411b9dbca58f16f8af8c21ebe49ba809f0efece3103b9aa7bb9d97b6685b20b

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