Malicious PDF — malware analysis report

Static analysis result for SHA-256 129ab917f5d03836…

MALICIOUS

PDF

44.7 KB Created: 2021-05-14 21:34:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 4b1e7d7a0afddd8bb7ca4489d4e46413 SHA-1: 526f465c11cfa59911d999b09ff5874f4ee342cf SHA-256: 129ab917f5d03836ef3a51e2c471949a1c369165e79d9409bfc1cb481105f772
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous links to external websites, many of which are structured as SEO-optimized PDF links, suggesting a link farm designed to attract users searching for game cheats and free in-game currency. The ML classifier also flagged this PDF as malicious. The primary attack pattern involves luring users to these external sites, likely for monetization or further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/479516143/how-to-get-free-minecoins-in-minecraft-game-hack
    • http://www.flytec.com.py/download/files/coin-master-free-spins-activegamer_GM406889139.pdf
    • http://www.flytec.com.py/download/files/coin-master-free-cards-link-2021_GM406889139.pdf
    • http://www.flytec.com.py/download/files/coin-master-apk-hack-35-8_GM406889139.pdf
    • http://www.flytec.com.py/download/files/free-free-robux_GM431946152.pdf
    • http://www.flytec.com.py/download/files/how-to-get-a-lot-of-robux_GM431946152.pdf
    • http://www.flytec.com.py/download/files/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdf
    • http://www.flytec.com.py/download/files/android-coin-master-hack-2021_GM406889139.pdf
    • http://www.flytec.com.py/download/files/minecraft-hacked-client-download_GM479516143.pdf
    • http://www.flytec.com.py/download/files/free-printable-roblox-coloring-pages_GM431946152.pdf
    • http://www.flytec.com.py/download/files/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdf
    • http://www.flytec.com.py/download/files/best-way-to-get-free-robux_GM431946152.pdf
    • http://www.flytec.com.py/download/files/master-free-spin-and-coin-links-html-m-1_GM406889139.pdf
    • http://www.flytec.com.py/download/files/coin-master-hack-android-root_GM406889139.pdf
    • http://www.flytec.com.py/download/files/free-roblox-followers-generator_GM431946152.pdf
    • http://www.flytec.com.py/download/files/hack-my-game-xyz-coin-master_GM406889139.pdf
    • http://www.flytec.com.py/download/files/free-robux-groups-2021_GM431946152.pdf
    • http://www.flytec.com.py/download/files/coin-master-free-spins-hack-ios_GM406889139.pdf
    • http://www.flytec.com.py/download/files/free-robux-that-actually-works-2021_GM431946152.pdf
    • http://www.flytec.com.py/download/files/how-to-get-free-unlimited-robux_GM431946152.pdf
    • http://www.flytec.com.py/download/files/codes-how-to-get-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ca4.bin
0ba03df2c23a8fb2090247185da23735e9859ec0c363c4a8990b3dff121b8e93
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CA4 24700 bytes
font_01_sfnt_off000083b6.bin
3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
pdf-font-stream PDF embedded font (sfnt) at offset 0x83B6 2840 bytes
font_02_sfnt_off00008d68.bin
81b1d154aec9bd98ecdb2ab8ecc7cbe93e1e8bf82edf60babb6ca5717914fb66
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D68 17872 bytes