Malicious PDF — malware analysis report

Static analysis result for SHA-256 5137764ac855cce8…

MALICIOUS

PDF

34.2 KB Created: 2021-07-09 00:04:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 29286b186390db79ac3a1b42338cc6f2 SHA-1: 330c9bb2cac8089685f475b55999a009e584fe77 SHA-256: 5137764ac855cce8010f76d21691deb8f5ba26e1a2121bd790efa3c74df72cd0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically advertising 'free Robux' or game hacks. The document body and extracted URLs strongly suggest a social engineering lure to drive traffic to potentially malicious sites. While no scripts were explicitly extracted, the nature of the links and the 'game hack' lure indicate a phishing or malware distribution attempt.

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/how-to-get-free-robux-inspect-game-hack In PDF document text
    • https://eyeonhimalaya.com/userfiles/files/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/is-minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/coin-master-hack-tool-v1-9-pc_GM406889139.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/how-to-hack-coin-master-game_GM406889139.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/roblox-pics_GM431946152.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/how-to-get-free-minecraft-alts_GM479516143.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/roblox-inappropriate-games_GM431946152.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/hack-coin-master-without-root_GM406889139.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/coin-master-hacks_GM406889139.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/free-robux-group_GM431946152.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/robux-free-gift-card_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_off00002ecb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ECB 22264 bytes
SHA-256: 3637ebc3e66a3ffe10e0c0aae002e37cf44844a2e7af9da4219e83c194a43c24
font_01_sfnt_off00006003.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6003 19160 bytes
SHA-256: a79e904f98942f0f1997061c783f6f470572e5bb469a52c8c6f0e1a5d6c47e09

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