Malicious PDF — malware analysis report

Static analysis result for SHA-256 069af498a1b7b65c…

MALICIOUS

PDF

49.0 KB Created: 2021-06-09 05:01:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 88fca8bbe20352a5d67859d551ce33b5 SHA-1: ac4ea858cab765c78999da71d1b959014a3e200c SHA-256: 069af498a1b7b65c49614ef886d73ad7c8839d2d9d806f609a3649aa602007fe
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector domains, including one that impersonates a game hack generator. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains a URL that aligns with the malicious redirector findings, suggesting the primary purpose is to drive traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/find-roblox-on-computer-hack-in-escape-from-the-demon-game-hack In PDF document text
    • https://www.manmed.info:443/images/games-like-coin-master_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/minecraft-games-free-to-play-online_GM479516143.pdfIn PDF document text
    • https://www.manmed.info:443/images/how-can-get-a-roblox-hack-gui-to-work_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-free-spin-and-coins-links-home_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/how-to-get-followers-on-tiktok-for-free_GM835599320.pdfIn PDF document text
    • https://www.manmed.info:443/images/comment-gagne-des-robux-free_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-free-spin_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-compagnon-roblox_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-robux-just-enter-username_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/how-to-download-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • https://www.manmed.info:443/images/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/freer-tiktok_GM835599320.pdfIn PDF document text
    • https://www.manmed.info:443/images/roblox-jailbreak-money-hack-no-survey_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/roblox-kick-off-hack_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-apk-hack-3527_GM406889139.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
stream_004_off00005060.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5060 29164 bytes
SHA-256: e0e37c59d0dfa06289dfb811a3777ef90da7ad3bcea2f3033570e371bd208c14
font_01_sfnt_off00008f46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F46 2888 bytes
SHA-256: dcdd98ee8e25436a83587ccb4027347dd2c3fcec95f3413942edd4086125bcca
font_02_sfnt_off0000991a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x991A 19652 bytes
SHA-256: 9f54eccf4caa1b720c491b4c8dae4a589b7b4f3e569624cbbcb7577031e5d6ed

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