Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a0f43edc4181e34…

MALICIOUS

PDF

36.4 KB Created: 2021-06-30 08:36:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 6a4e3020c54ee92b6792753ca06113a0 SHA-1: d403982af1986fdca6c303b09e415a0b10fb1457 SHA-256: 0a0f43edc4181e34f9e86bae5810918f5d3b41addcf9b1fd0d6c40e15a4a1605
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document is designed as a lure, presenting itself as a guide to obtaining free in-game currency and items for popular games. It contains a large number of external links, many of which point to other PDF files, suggesting a link farm or redirection mechanism. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external URIs indicates an attempt to direct users to potentially harmful content.

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.co/app/431946152/how-to-get-free-shirts-on-roblox-no-bc-2021-game-hack
    • http://stiepariperpus.web.id/sarjana//repository/hack-the-coin-master-game_GM406889139.pdf
    • http://stiepariperpus.web.id/sarjana/repository/free-spins-coin-master-hack-2021_GM406889139.pdf
    • http://stiepariperpus.web.id/sarjana/repository/how-to-get-a-free-2021-robux_GM431946152.pdf
    • http://stiepariperpus.web.id/sarjana//repository/spin-free-coin-master_GM406889139.pdf
    • http://stiepariperpus.web.id/sarjana//repository/coin-master-guide-to-free-spins-and-rewards_GM406889139.pdf
    • http://stiepariperpus.web.id/sarjana/repository/to-get-free-robux_GM431946152.pdf
    • http://stiepariperpus.web.id/sarjana/repository/hacked-server-roblox-id_GM431946152.pdf
    • http://stiepariperpus.web.id/sarjana//repository/how-to-get-free-robux-without-any-verification_GM431946152.pdf
    • http://stiepariperpus.web.id/sarjana/repository/cmaster-club-coin-master-hack_GM406889139.pdf
    • http://stiepariperpus.web.id/sarjana/repository/how-to-hack-on-roblox-jailbreak-2021_GM431946152.pdf
    • http://stiepariperpus.web.id/sarjana/repository/earn-free-robux-by-completing-offers-and-surveys_GM431946152.pdf
    • http://stiepariperpus.web.id/sarjana/repository/free-tiktok-likes-and-followers_GM835599320.pdf
    • http://stiepariperpus.web.id/sarjana/repository/get-me-robux_GM431946152.pdf
    • http://stiepariperpus.web.id/sarjana/repository/how-to-get-free-robux-on-roblox-youtube_GM431946152.pdf
    • http://stiepariperpus.web.id/sarjana/repository/how-to-have-free-points-for-robux-in-oprewards_GM431946152.pdf
    • http://stiepariperpus.web.id/sarjana/repository/roblox-hack-grab-knife-free_GM431946152.pdf
    • http://stiepariperpus.web.id/sarjana//repository/robux-today_GM431946152.pdf
    • http://stiepariperpus.web.id/sarjana/repository/april-fools-day-2021-hack-roblox_GM431946152.pdf
    • http://stiepariperpus.web.id/sarjana/repository/coin-master-free-cards_GM406889139.pdf
    • http://stiepariperpus.web.id/sarjana//repository/grabpoints-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000321e.bin
807badf9a7c796b9f411562483813dc5dec6edc3ee8494851b8b2937d8aa5f03		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x321E 23600 bytes
font_01_sfnt_off000067b4.bin
2ac131414f248dfd3e9e2e455018a07ae9484cc88105803d4240519d1449239d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67B4 19604 bytes

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