Malicious PDF — malware analysis report

Static analysis result for SHA-256 26e9e74cb6e125ab…

MALICIOUS

PDF

44.6 KB Created: 2021-06-10 11:25:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 39845b644baf39a74d333a756e8bf150 SHA-1: 880449ba403920e4954248d552a5d2ff8c2f3690 SHA-256: 26e9e74cb6e125ab77fb11854b3633318f8e0fc199e64c11c55d602294536c6d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as game hacks for Roblox and Minecraft. The primary lure URL is https://netcdn.tw/app/431946152/cheats-for-jailbreak-roblox-2021-game-hack, which is designed to trick users into downloading potentially malicious content. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.tw/app/431946152/cheats-for-jailbreak-roblox-2021-game-hack In PDF document text
    • https://www.manmed.info:443/images/spin-coin-master_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/minecraft-noob-vs-pro-vs-hacker-vs-god_GM479516143.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-hacks-2021_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/minecraft-online-free-no-download_GM479516143.pdfIn PDF document text
    • https://www.manmed.info:443/images/roblox-cheat-command-code_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/on-roblox-someone-hacked-me-and-lost-all-my-robux_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-roblox-accounts-with-builders-club_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/roblox-a_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/minecraft-free-download-iphone_GM479516143.pdfIn PDF document text
    • https://www.manmed.info:443/images/minecraft-handbook_GM479516143.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-minecraft-packs_GM479516143.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-link-app_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/how-to-get-a-lot-of-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/roblox-give-robux-free_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-hack-spin_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-robux-and-tickets-generator-2021_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/moon-active_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
stream_004_off00004f5e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F5E 24944 bytes
SHA-256: d76ecdd9d4c2f776a4d2ed2676cd66af909bd42780fc2f81e79aa2352bdc0906
font_01_sfnt_off000088a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88A6 19304 bytes
SHA-256: 716b5e072bbf2f2ea3689c6e43ecc0bff5028912c4cd42e15290bf404217c643

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