Malicious PDF — malware analysis report

Static analysis result for SHA-256 941831fc7eb3d074…

MALICIOUS

PDF

32.8 KB Created: 2021-07-02 02:50:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 219a6ec0f3ed0d967012a2f0ed04005c SHA-1: f16ee34ef3f2114219b23d958255a68b5adf7aae SHA-256: 941831fc7eb3d074db4cbfbe34a52f2df46965b4ed8225e12db0fdaa8bb59d27
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a game hack lure to entice users to click on links. The document contains numerous URLs pointing to external resources, some of which are hosted on an IP address, suggesting a distribution point for further malicious content. The ML classifier strongly indicated maliciousness, and the overall structure points to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/how-to-get-a-free-server-on-roblox-game-hack PDF link annotation
    • http://103.68.2.77/__statics/gudangsoal/files/roblox-hack-robux-download-apk_GM431946152.pdfPDF link annotation
    • http://103.68.2.77/__statics/gudangsoal/files/free-roblox-hair-boy_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/coin-master-free-link-facebook_GM406889139.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/flip-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/free-tiktok-followers-app_GM835599320.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/pokemon-go-free-candy-hack_GM1094591345.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/how-to-get-100k-robux-for-free_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/free-robux-real-roblox_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/roblox-god-admin-hacks_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/robloxcom-free-kkk-k_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/how-to-hack-for-money-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/roblox-code-hack-speed_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/site-cheat-roblox_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/free-robux-wheel_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/how-to-get-cheats-on-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/tiktok-free-coins_GM835599320.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/if-i-uninstall-minecraft-can-i-reinstall-it-for-free_GM479516143.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/how-to-get-minecraft-bedrock-for-free_GM479516143.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_off00002a98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A98 21968 bytes
SHA-256: 83884d1c7c0b8c50d2aba0ae32d65c28406c5b7c847af5a95e881395b4869aa0
font_01_sfnt_off00005b21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B21 19032 bytes
SHA-256: a4605e89749b5aa59caa60e09c7e202dca0d3b75673a44f4e1577cd3abf77ffe

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