Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc9c3ed2e433f3b1…

MALICIOUS

PDF

43.2 KB Created: 2021-05-16 19:02:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 92acd1207671e074cd3a89cb3ab179fd SHA-1: f88095cc3155efeff9e505d905338da66fad73f5 SHA-256: bc9c3ed2e433f3b12420520dbe60ec27bc7a52dc0cee5cec79f8e3ec23543f17
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF document contains a large number of external links, many of which are structured as SEO-optimized PDF links, suggesting a link farm. The document body and extracted URLs indicate a lure related to game hacks and cheats, combined with a remote support tool lure. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external links points towards a potential drive-by download or redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 5

  • 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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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-hacks-on-minecraft-game-hack
    • https://elearning.man2kotaserang.sch.id/__statics/gudangsoal/files/clean-master-free-coins-and-spins_GM406889139.pdf
    • https://elearning.man2kotaserang.sch.id/__statics/gudangsoal/files/how-to-get-free-cards-in-coin-master_GM406889139.pdf
    • https://elearning.man2kotaserang.sch.id/__statics/gudangsoal/files/coin-master-free-spins-cheat-codes_GM406889139.pdf
    • https://elearning.man2kotaserang.sch.id/__statics/gudangsoal/files/free-coin-link-coin-master_GM406889139.pdf
    • https://elearning.man2kotaserang.sch.id/__statics/gudangsoal/files/free-spin-link-in-coin-master-game_GM406889139.pdf
    • https://elearning.man2kotaserang.sch.id/__statics/gudangsoal/files/coin-master-hack-2021-ios_GM406889139.pdf
    • https://elearning.man2kotaserang.sch.id/__statics/gudangsoal/files/bloxpink-free-robux_GM431946152.pdf
    • https://elearning.man2kotaserang.sch.id/__statics/gudangsoal/files/coin-master-coin-link_GM406889139.pdf
    • https://elearning.man2kotaserang.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-today-new_GM406889139.pdf
    • https://elearning.man2kotaserang.sch.id/__statics/gudangsoal/files/coin-master-hack-spins-download_GM406889139.pdf
    • https://elearning.man2kotaserang.sch.id/__statics/gudangsoal/files/roblox-free-robux-hack_GM431946152.pdf
    • https://elearning.man2kotaserang.sch.id/__statics/gudangsoal/files/need-free-spins-for-coin-master_GM406889139.pdf
    • https://elearning.man2kotaserang.sch.id/__statics/gudangsoal/files/hack-coin-master-android_GM406889139.pdf
    • https://elearning.man2kotaserang.sch.id/__statics/gudangsoal/files/coin-master-heaven-free-spins-link-2021_GM406889139.pdf
    • https://elearning.man2kotaserang.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-by-playing-games_GM431946152.pdf
    • https://elearning.man2kotaserang.sch.id/__statics/gudangsoal/files/is-roblox-hacked_GM431946152.pdf
    • https://elearning.man2kotaserang.sch.id/__statics/gudangsoal/files/google-how-do-you-get-free-robux_GM431946152.pdf
    • https://elearning.man2kotaserang.sch.id/__statics/gudangsoal/files/roblox-shirt-template-free_GM431946152.pdf
    • https://elearning.man2kotaserang.sch.id/__statics/gudangsoal/files/roblox-games-with-free-radio_GM431946152.pdf
    • https://elearning.man2kotaserang.sch.id/__statics/gudangsoal/files/hack-coin-master-with-lucky-patcher_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004d0d.bin
d7649456a8a56778c813be0241996206b39a4f6826951527e6d26b70db510be3		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D0D 25444 bytes
font_01_sfnt_off00008771.bin
9f1e79a3b07781afcdd90921eb79530491bd6e36a063b246dd64f6dc9a4bd67a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8771 18044 bytes

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