Malicious PDF — malware analysis report

Static analysis result for SHA-256 9456e529fe6f5b46…

MALICIOUS

PDF

34.4 KB Created: 2021-07-09 06:16:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 526d7f1022a09c299a38e2e62f502a6a SHA-1: 4397214a4520d78213c00415727f85fddc189a93 SHA-256: 9456e529fe6f5b46650ae29c58fffe84752e82cf0bbc6f0b5758ab3149a8c52b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains links that redirect to malicious infrastructure, specifically advertising game hacks and cheats. The primary link, http://netcdn.tw/app/431946152/best-roblox-hacks-game-hack, is identified as a malicious redirector. The document body and embedded URLs suggest a lure for users seeking in-game advantages, which is a common social engineering tactic. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence indicate a high likelihood of malicious intent.

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.tw/app/431946152/best-roblox-hacks-game-hack In PDF document text
    • https://encounternepal.com/userfiles/files/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/windows-10-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/roblox-free-robux-scam-uncopylocked_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/is-robux-free-for-today_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-minecraft-survival-server_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/roblox-password-hacker_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/best-hack-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/xray-mod-minecraft-114_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-game-hunters-club_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-hack-no-verification-no-signup_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/safe-hack-for-coin-master-android_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/adopt-me-hacks-in-roblox_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-link-for-spins_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-hack-twitter_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_off0000310a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x310A 22176 bytes
SHA-256: d60fa09ea28320ee137eb897836e40ad8124d7b13d1af0786f45eda4ccef91cc
font_01_sfnt_off000061e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61E8 18760 bytes
SHA-256: e14aca0229ecc4e5c80b50bf306c735d86496ae3d09c438880efd707b555ae7f

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