Malicious PDF — malware analysis report

Static analysis result for SHA-256 5092a14efc7312a9…

MALICIOUS

PDF

43.4 KB Created: 2021-05-15 14:35:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0d1f0ee0f5b52672a9507c6bfe61923d SHA-1: 79312332319f7e2fbc01ee1fbc27f431f2f1d8b2 SHA-256: 5092a14efc7312a929eb0cd3913ec62ca1352338b5abc90bad2449ccad63c4ba
102 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which are SEO-optimized and point to other PDF files, suggesting a link farm designed to attract users searching for game cheats or hacks. The primary URL, 'https://netcdn.xyz/app/479516143/minecraft-hax-download-no-virus-game-hack', is presented as a download for 'Minecraft Hax'. The heuristic 'PDF_SEO_LINK_FARM' and the ML classifier strongly indicate malicious intent, likely to redirect users to download unwanted or malicious software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/minecraft-hax-download-no-virus-game-hack
    • http://plastic-surgery.pl/images/minecraft-that-you-can-play-for-free_GM479516143.pdf
    • http://plastic-surgery.pl/images/free-robux-no-verification-no-survey_GM431946152.pdf
    • http://plastic-surgery.pl/images/how-to-get-free-robux-without-any-verification_GM431946152.pdf
    • http://plastic-surgery.pl/images/free-400-spins-coins-master_GM406889139.pdf
    • http://plastic-surgery.pl/images/how-to-hack-roblox-to-get-robux_GM431946152.pdf
    • http://plastic-surgery.pl/images/get-free-spins-on-coin-master_GM406889139.pdf
    • http://plastic-surgery.pl/images/rbl-gg-free-robux_GM431946152.pdf
    • http://plastic-surgery.pl/images/hack-coin-master-without-verification_GM406889139.pdf
    • http://plastic-surgery.pl/images/free-minecraft-client_GM479516143.pdf
    • http://plastic-surgery.pl/images/free-spins-link-in-coin-master-2021_GM406889139.pdf
    • http://plastic-surgery.pl/images/coin-master-village-cost_GM406889139.pdf
    • http://plastic-surgery.pl/images/fighting-free-card-coin-master_GM406889139.pdf
    • http://plastic-surgery.pl/images/www-coinmaster-com_GM406889139.pdf
    • http://plastic-surgery.pl/images/coin-master-attack-block-hack_GM406889139.pdf
    • http://plastic-surgery.pl/images/wurst-112_GM479516143.pdf
    • http://plastic-surgery.pl/images/google-coin-master-free-spins_GM406889139.pdf
    • http://plastic-surgery.pl/images/free-coins-for-flip-master_GM406889139.pdf
    • http://plastic-surgery.pl/images/free-roblox-hair-to-wear_GM431946152.pdf
    • http://plastic-surgery.pl/images/coin-master-hack-club_GM406889139.pdf
    • http://plastic-surgery.pl/images/free-script-executor-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c8b.bin
38344a00c93ffcd15faeaafdea5c0ebb30794e92664af31bfbd06f901504b6b3
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C8B 25168 bytes
font_01_sfnt_off000085c6.bin
c700757df4146bcd75611d33c41ed0aca4ff62925dbc333fb331944c4ea3b8c9
pdf-font-stream PDF embedded font (sfnt) at offset 0x85C6 18772 bytes