Malicious PDF — malware analysis report

Static analysis result for SHA-256 f20cc06224037de6…

MALICIOUS

PDF

41.2 KB Created: 2021-05-14 21:36:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 1ecf90ad3ee86dc80967426315d10861 SHA-1: 8f2598b851f5a42fd1187726e92ab550d9533ac3 SHA-256: f20cc06224037de6c5a1febbc05b4401a5f6653bb782e23460f9b639f0c1c67f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting "game hacks" and "generators." The primary malicious URL identified is https://netcdn.xyz/app/406889139/coin-master-pc-hack-download-game-hack. The document body and embedded links suggest a social engineering lure to trick users into visiting potentially harmful sites, likely for further malware delivery or credential harvesting.

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/406889139/coin-master-pc-hack-download-game-hack In PDF document text
    • http://www.nfca.org.tw/upload/files/roblox-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/roblox-rewards_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/minecraft-hacks-18-9_GM479516143.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/how-to-get-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/do-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/all-free-items-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/how-to-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/minecraft-servers-that-allow-hacks_GM479516143.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/roblox-system_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/coin-master-hack-here_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/hack-roblox-players_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/pig-master-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/coin-master-cheats-and-hacks_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/play-roblox-for-free-on-google_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/blox-pink-robux-free_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
stream_003_off00004620.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4620 24416 bytes
SHA-256: 057fa4866f0e278394600bb77517f1b837057728893606c168a6d131c6c7cfaa
font_01_sfnt_off00007df4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DF4 18448 bytes
SHA-256: 8402008f23238815903f7ba327df2f1e722924fad7259551d96baa1836994324

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