Malicious PDF — malware analysis report

Static analysis result for SHA-256 52998fc272736654…

MALICIOUS

PDF

33.6 KB Created: 2021-07-06 13:00:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 609730c117f642a1dcf8c5910a44fd65 SHA-1: 76b892e3396f42c8be0c83b5445baf5cadb677e6 SHA-256: 52998fc27273665470e83da4032a99dd9638ce0587aedcfa6d4a0ca15dd189fd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, including one that promises a 'free generator / game hack'. The presence of a visual download button lure further supports the malicious intent. The document body itself contains the primary malicious URL, suggesting a social engineering tactic to trick users into downloading further malware.

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/free-roblox-toys-game-hack In PDF document text
    • https://c2o-library.net/catalog/repository/how-to-hack-roblox-no-files_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/heroes-online-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-critical-strike-secrets-cheats_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/tiktok-free-folowers-jio-phone-install-tamil_GM835599320.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-hack-item-for-free_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/speed-script-roblox-hack-pastebin_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-do-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/https-roblox-hack_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-hack-reddit_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/bad-minecraft-free_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/ads-for-roblox-games-free_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-free-cards-codes-2021_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-hack-website_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/youtube-free-robux-november-13-2021_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-free-account-biz_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-csgo-skins-roblox-id-audio_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/minecraft-pocket-edition-free_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-2021-no-human-verification_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_off00002e68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E68 21908 bytes
SHA-256: e3911c572bc7c5619e56f37d8000e279fe20a346f4c6ea581a33dbd00d7e3784
font_01_sfnt_off00005ee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE4 18828 bytes
SHA-256: 0ae16075fab88340abf3ae58f1c231bf26e12fe3956ddb751496fa7b825c2438

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