Malicious PDF — malware analysis report

Static analysis result for SHA-256 44fae53f0d8f8e1f…

MALICIOUS

PDF

34.8 KB Created: 2021-06-18 07:04:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 5e9f5e026a9c5e0e7bbd3cce27b2f65c SHA-1: f1bce140b51f185d7b1ee7a0ad27f7b2038bc3aa SHA-256: 44fae53f0d8f8e1fd259911ae504d691e24317cfc15134db53f28ad2062759a3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game hacks and generators to entice users into clicking malicious links. The document body and embedded URLs point to known malicious redirector infrastructure, which likely serves as a gateway to further malicious content or downloads. The ML classifier strongly indicates maliciousness, and the presence of redirector links confirms a malicious intent to lead users to untrusted sites.

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-super-power-training-simulator-free-vip-server-game-hack In PDF document text
    • http://lib.kunci.or.id/repository/minecraft-coins-free_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/gain-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/minecraft-servers-that-allow-hacks_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-daily-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-download-app-verification_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/wurst-client-18-9_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-jailbreak-money-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-roblox-user-and-password_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-make-my-own-coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-install-roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/minecraft-tower-defense-hacked_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-glitch-roblox-game_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/can-you-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-add-a-second-floor-in-roblox-bloxburg-free_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-com-free-robux_GM431946152.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_off0000306b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x306B 21684 bytes
SHA-256: 6c774a8dc6c0b931219224640b51368198328ff8fbf223b2f5b34aa0bd582b72
font_01_sfnt_off0000603f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x603F 20016 bytes
SHA-256: 1b4e20665d405467b3fec77a1827951c81604e697cbb323738ecd8f188e023d2

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