Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa4422822c9b8c56…

MALICIOUS

PDF

34.8 KB Created: 2021-07-02 03:17:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 20da8959950cd71fddbc8463f88b2c39 SHA-1: 6c030b4748bbae32fb40b9762516870367d58257 SHA-256: aa4422822c9b8c561166dabd17e9b9a6a4730c2f141997db133e0435e3760f8e
160 Risk Score

Malware Insights

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

The PDF contains numerous links to redirectors and other PDFs, masquerading as game hacks and generators for popular games like Roblox and Coin Master. The heuristic firings indicate these links lead to malicious infrastructure and are designed as lures. The document body, though partially corrupted, contains URLs that reinforce this lure-based attack pattern.

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-pc-download-free-game-hack In PDF document text
    • http://slim.sisminkada.net/repository/how-to-play-roblox-free_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/minecraft-bedrock-edition-free-with-java_GM479516143.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/how-to-get-free-robux-2021-legally_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/guava-juice-free-robux_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/spam-roblox-hack-pastebin_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/how-to-make-clothes-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/phantom-forces-roblox-dll-hack_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/how-to-get-more-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/how-to-get-20-free-robux_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/dll-hacks-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/how-to-have-free-shirts-bc-roblox_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-spin-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/roblox-lua-hacking_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/easy-robux_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/radio-cheat-roblox_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-ways-to-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/coin-master-game-download-free_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_off000030ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30FF 22144 bytes
SHA-256: a0a54e17b98ed66318d4505539ccc03b360151b542d798f6d9ad8b5753c273ce
font_01_sfnt_off00006235.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6235 19312 bytes
SHA-256: 92c9ff256cd9e6f957a4ea1788504d3f4abf8a8470736e01d53f57cde1fee8c4