Malicious PDF — malware analysis report

Static analysis result for SHA-256 72d6e5dbf8496d28…

MALICIOUS

PDF

39.2 KB Created: 2021-07-05 22:34:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 613012b7e19b533bda9f10467c6746ea SHA-1: a232c4f835ea70ae51ca94ec11c262d56720f4c0 SHA-256: 72d6e5dbf8496d2805e85afb7c88e0b48d4f46c53140e3c64bbdf3c59bc68fe7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack lure, directing users to a known malicious redirector. The document body also contains the same redirector URL, reinforcing the malicious intent. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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/free-spins-coin-master-no-survey-game-hack In PDF document text
    • http://library.atim.ac.id/repository/robux-best_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-t-shirt-size-free-shipping_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-hack-roblox-accounts-abandon_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/redeem-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-shirts-and-pants-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-guess-the-famous-characters-solutions-cheat-sheets_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-roblox-accounts-without-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-jailbreak-hack-dll_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-minecraft-wallpaper_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/the-labyrinth-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-arsenal-hacks-download_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-hack-without-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-gravity-cheat-engine_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/hacking-roblox-assain_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-vip-link-server-roblox-any-game_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/como-hackear-cuentas-de-roblox-2021-facil_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-phantom-forces-aimbot-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-get-build-tools-on-roblox-cheating-2021_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-dominus-roblox-mobile_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-get-robux-for-free-hack-2021_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_off000037ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x37CA 22948 bytes
SHA-256: c02edc7a7e079167900c2ac81ba545d7c26a1d84ce8b2fd17b495e3b81adcd29
font_01_sfnt_off00006b6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B6A 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off0000754f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x754F 18608 bytes
SHA-256: 680cafe8e4b1b393f295b34d6fcd5460ee3344c8993a72aaa8a95020f58f412b

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