Malicious PDF — malware analysis report

Static analysis result for SHA-256 6959e5fe95088386…

MALICIOUS

PDF

35.1 KB Created: 2021-07-07 21:13:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: fc5972f3946e96888267cb9053cd99d2 SHA-1: a54eadaef2f898ecbcc3f471e96e27a24850c44f SHA-256: 6959e5fe950883863eda745a0b17109cda54b275ff0f9c4885119031e2686ddc
102 Risk Score

Malware Insights

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

This PDF document contains numerous external links, many of which are related to game hacks and free in-game currency, suggesting a lure for users seeking such content. The document's structure and the presence of a large number of external links point towards a link farm or phishing attempt designed to redirect users to potentially malicious websites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coinmaster-rewards-game-hack
    • https://elearning.min5bm.sch.id/__statics/gudangsoal/files/coin-master-free-spins-haktuts_GM406889139.pdf
    • https://elearning.min5bm.sch.id/__statics/gudangsoal/files/coin-master-firebird-card-free_GM406889139.pdf
    • https://elearning.min5bm.sch.id/__statics/gudangsoal/files/free-ways-to-get-robux_GM431946152.pdf
    • https://elearning.min5bm.sch.id/__statics/gudangsoal/files/get-robux-for-free-2021_GM431946152.pdf
    • https://elearning.min5bm.sch.id/__statics/gudangsoal/files/roblox-free-robux-no-verification_GM431946152.pdf
    • https://elearning.min5bm.sch.id/__statics/gudangsoal/files/coin-master-hack-facebook_GM406889139.pdf
    • https://elearning.min5bm.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-easy_GM431946152.pdf
    • https://elearning.min5bm.sch.id/__statics/gudangsoal/files/hack-coin-master-apk_GM406889139.pdf
    • https://elearning.min5bm.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdf
    • https://elearning.min5bm.sch.id/__statics/gudangsoal/files/games-like-minecraft-but-free_GM479516143.pdf
    • https://elearning.min5bm.sch.id/__statics/gudangsoal/files/spin-rewards-coin-master_GM406889139.pdf
    • https://elearning.min5bm.sch.id/__statics/gudangsoal/files/coin-master-hack-without-verification_GM406889139.pdf
    • https://elearning.min5bm.sch.id/__statics/gudangsoal/files/how-to-speedhack-roblox-without-cheat-engine_GM431946152.pdf
    • https://elearning.min5bm.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-100-real_GM431946152.pdf
    • https://elearning.min5bm.sch.id/__statics/gudangsoal/files/tryrbx-site-free-robux_GM431946152.pdf
    • https://elearning.min5bm.sch.id/__statics/gudangsoal/files/how-to-get-roblox-skins-for-free_GM431946152.pdf
    • https://elearning.min5bm.sch.id/__statics/gudangsoal/files/free-robux-2021-promo-codes_GM431946152.pdf
    • https://elearning.min5bm.sch.id/__statics/gudangsoal/files/free-robux-generator-no-human-verification-2021_GM431946152.pdf
    • https://elearning.min5bm.sch.id/__statics/gudangsoal/files/how-to-get-robux-for-free-2021_GM431946152.pdf
    • https://elearning.min5bm.sch.id/__statics/gudangsoal/files/oprewards-login_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000032a8.bin
d20ffe2df8f1242b91b15b5dc296951979811197e063032ea0e10652325e2497		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32A8 22900 bytes
font_01_sfnt_off0000661a.bin
f0edaf16bd8009573fa92d89786fb946d4f76dac2501643f884d8babe9c34ef0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x661A 18432 bytes

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