Malicious PDF — malware analysis report

Static analysis result for SHA-256 35fdbf1572eb0e7a…

MALICIOUS

PDF

44.3 KB Created: 2021-05-12 00:03:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 4369f3a87f76043a183dddbc58e4fe05 SHA-1: 05fea988d9426144d2eae3a254cc4783c2aac8e4 SHA-256: 35fdbf1572eb0e7a2a7425f3d21b2f6adf3678570c1264ce5e2ecb21808a9eb3
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to websites that promise game hacks and free in-game currency. The ML_NYX_PDF_MALICIOUS heuristic also flagged the document with high confidence. These links likely lead to phishing pages or malware downloads, aiming to exploit user interest in free game items.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/real-working-coin-master-hack-game-hack
    • http://uptodate.az/images/can-you-get-free-robux-on-roblox_GM431946152.pdf
    • http://uptodate.az/images/free-robux-com-real_GM431946152.pdf
    • http://uptodate.az/images/how-to-get-minecraft-for-free-on-phone_GM479516143.pdf
    • http://uptodate.az/images/robloxheroxyz-free-robux_GM431946152.pdf
    • http://uptodate.az/images/coin-master-hacks-for-free-spins_GM406889139.pdf
    • http://uptodate.az/images/free-robux-that-actually-works_GM431946152.pdf
    • http://uptodate.az/images/hack-coin-master-apk-ios_GM406889139.pdf
    • http://uptodate.az/images/best-way-to-get-robux_GM431946152.pdf
    • http://uptodate.az/images/roblox-free-login_GM431946152.pdf
    • http://uptodate.az/images/coin-master-daily-free-spins-link-today_GM406889139.pdf
    • http://uptodate.az/images/free-robux-no-human-verification-or-survey_GM431946152.pdf
    • http://uptodate.az/images/free-coin-master-app_GM406889139.pdf
    • http://uptodate.az/images/games-that-can-be-hacked_GM431946152.pdf
    • http://uptodate.az/images/roblox-www-com_GM431946152.pdf
    • http://uptodate.az/images/coin-master-hacks-for-iphone_GM406889139.pdf
    • http://uptodate.az/images/free-roblox-items-codes_GM431946152.pdf
    • http://uptodate.az/images/coin-mast-hacks_GM406889139.pdf
    • http://uptodate.az/images/coin-master-free-spins-hack-iphone_GM406889139.pdf
    • http://uptodate.az/images/where-can-i-get-free-coins-for-coin-master_GM406889139.pdf
    • http://uptodate.az/images/minecraft-sign-up-free_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004644.bin
e07e0525917aa0dd51bd69748fd37a1c784e6e6ca3a4facf13d52cf454f43d4f
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4644 24840 bytes
font_01_sfnt_off00007f37.bin
4b3e0f36ad1e0c7e3ea5c178fd2b4f097d1e01575fc6a4101a8b520db34dfe07
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F37 3400 bytes
font_02_sfnt_off00008a60.bin
b738e75be18aea5c9f27761cbb1ef73bc9b28f3240c5da18f5fa5a3f41f529c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A60 18276 bytes