Malicious PDF — malware analysis report

Static analysis result for SHA-256 1aa442341534e228…

MALICIOUS

PDF

44.4 KB Created: 2021-05-14 02:03:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a0295560b98dbbef585a6d89bd0ac387 SHA-1: 4d2954c16743cc3384cc646174c6d79e482764c5 SHA-256: 1aa442341534e228cbde9f915044b29bc88a46e9660f743827ea68f5143f0486
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which are SEO-optimized and point to sites offering game hacks or cheats. The ML classifier also flagged this PDF as malicious. The presence of a download button lure and embedded URLs suggests an attempt to redirect users to malicious content or downloads.

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/406889139/android-coin-master-3.4.33-apk-hack-game-hack
    • https://elite-house.su/images/how-to-get-free-coins-in-coin-master_GM406889139.pdf
    • https://elite-house.su/images/free-roblox-pin-codes_GM431946152.pdf
    • https://elite-house.su/images/how-to-get-minecraft-for-free-on-mobile_GM479516143.pdf
    • https://elite-house.su/images/coin-master-free-spins-link-today-facebook_GM406889139.pdf
    • https://elite-house.su/images/minecraft-pe-016-0-apk-download-free_GM479516143.pdf
    • https://elite-house.su/images/free-coins-on-coin-master_GM406889139.pdf
    • https://elite-house.su/images/free-roblox-gift-card-codes-2021-unused_GM431946152.pdf
    • https://elite-house.su/images/how-do-i-get-robux_GM431946152.pdf
    • https://elite-house.su/images/coin-master-daily-free-spins-link-facebook_GM406889139.pdf
    • https://elite-house.su/images/moon-static-coin-master-generator-hacks-free_GM406889139.pdf
    • https://elite-house.su/images/coin-master-free-spins-1-coin-master_GM406889139.pdf
    • https://elite-house.su/images/free-robux-without-human-verification-2021_GM431946152.pdf
    • https://elite-house.su/images/free-robux-master_GM431946152.pdf
    • https://elite-house.su/images/coin-master-hack_GM406889139.pdf
    • https://elite-house.su/images/how-to-sue-roblox_GM431946152.pdf
    • https://elite-house.su/images/free-robux-without-verify_GM431946152.pdf
    • https://elite-house.su/images/free-outfits-roblox_GM431946152.pdf
    • https://elite-house.su/images/roblox-adopt-me-hacks-2021_GM431946152.pdf
    • https://elite-house.su/images/free-robux-mobile_GM431946152.pdf
    • https://elite-house.su/images/coin-master-unlimited-spin-link_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004751.bin
27288f75a6dc31cdc594aa5e2d684b032458d82289fe663b33696d307eaa751b
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4751 25224 bytes
font_01_sfnt_off000080d6.bin
381f6d859be141449dd645f7be1484d2a1cf49218dc471b402dae69eaa2b11d5
pdf-font-stream PDF embedded font (sfnt) at offset 0x80D6 2824 bytes
font_02_sfnt_off00008a78.bin
2f065b262c90889b0791dea6979f9c4554e2b44db1fd5e7dc87a2220bb7dab5c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A78 18368 bytes