Malicious PDF — malware analysis report

Static analysis result for SHA-256 377a74eac7ae26bc…

MALICIOUS

PDF

43.1 KB Created: 2021-05-12 14:12:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: bc1097321876fab76b6a625c54481f27 SHA-1: b17819614120434a34ad52de6e548d2185e50624 SHA-256: 377a74eac7ae26bc2213af112f9a7a8e62a0cfaef7c7272b848bfa84756a7250
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and sites offering game hacks and free currency, indicative of a phishing or scam lure. The embedded URLs, such as https://netcdn.xyz/app/431946152/free-roblox-accounts-that-work-game-hack, are designed to trick users into visiting potentially harmful sites. The presence of a visual download button lure further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/431946152/free-roblox-accounts-that-work-game-hack In PDF document text
    • http://mountain.mn/uploads/files/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://mountain.mn/uploads/files/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://mountain.mn/uploads/files/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://mountain.mn/uploads/files/coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • http://mountain.mn/uploads/files/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://mountain.mn/uploads/files/earn-points-for-robux_GM431946152.pdfIn PDF document text
    • http://mountain.mn/uploads/files/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://mountain.mn/uploads/files/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://mountain.mn/uploads/files/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://mountain.mn/uploads/files/coin-master-free-spins-link-cheat_GM406889139.pdfIn PDF document text
    • http://mountain.mn/uploads/files/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://mountain.mn/uploads/files/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://mountain.mn/uploads/files/coin-master-hack-2021-apk_GM406889139.pdfIn PDF document text
    • http://mountain.mn/uploads/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://mountain.mn/uploads/files/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • http://mountain.mn/uploads/files/how-to-get-2021-robux-for-free_GM431946152.pdfIn PDF document text
    • http://mountain.mn/uploads/files/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://mountain.mn/uploads/files/how-to-get-free-spins-on-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://mountain.mn/uploads/files/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://mountain.mn/uploads/files/coin-master-facebook-hack_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_003_off00004861.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4861 25972 bytes
SHA-256: 92ef68f0ed48ea5821bc28518f843aa6ed0ea8c67d141f7be121d9c5abaa9ee3
font_01_sfnt_off00008408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8408 18952 bytes
SHA-256: 5a520a129cd8904d435b2c3265355279d09350e58b7119a0e5602aa69de64cf4

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