Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a357087b5dce605…

MALICIOUS

PDF

34.7 KB Created: 2021-06-18 12:48:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 3a45d1102c08eb0abb3a645845265dd3 SHA-1: 75a5af581013ecfbca5d99a5526a34f0f92ffe65 SHA-256: 0a357087b5dce6055b4b47b972797d42f72475a6ec17770d7d44185fc1892670
102 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are SEO-optimized and point to content related to 'Robux' and game hacking. The primary URL, http://netcdn.co/app/431946152/how-to-get-free-robux-with-cheat-engine-6.6-2021-game-hack, suggests a lure for users seeking free in-game currency, likely leading to malware or phishing. 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.co/app/431946152/how-to-get-free-robux-with-cheat-engine-6.6-2021-game-hack
    • http://iba.org.fj/wp-content/uploads/fsqm-files/roblox-studio-how-to-make-a-free-robux-game_GM431946152.pdf
    • http://iba.org.fj/wp-content/uploads/fsqm-files/free-doge-head-roblox_GM431946152.pdf
    • http://iba.org.fj/wp-content/uploads/fsqm-files/how-to-hack-pizzeria-simulator-roblox_GM431946152.pdf
    • http://iba.org.fj/wp-content/uploads/fsqm-files/how-to-get-robux-for-free-on-a-comuter_GM431946152.pdf
    • http://iba.org.fj/wp-content/uploads/fsqm-files/free-robux-roblox-yolasite_GM431946152.pdf
    • http://iba.org.fj/wp-content/uploads/fsqm-files/free-promo-codes-for-robux_GM431946152.pdf
    • http://iba.org.fj/wp-content/uploads/fsqm-files/wall-hack-csgo-roblox_GM431946152.pdf
    • http://iba.org.fj/wp-content/uploads/fsqm-files/roblox-big-paint-ball-executor-free-download_GM431946152.pdf
    • http://iba.org.fj/wp-content/uploads/fsqm-files/cheats-to-type-in-roblox_GM431946152.pdf
    • http://iba.org.fj/wp-content/uploads/fsqm-files/rblx-gg-earn-free-robux_GM431946152.pdf
    • http://iba.org.fj/wp-content/uploads/fsqm-files/free-long-good-roblox-names_GM431946152.pdf
    • http://iba.org.fj/wp-content/uploads/fsqm-files/free-roblox-gift-cards-nov-2021_GM431946152.pdf
    • http://iba.org.fj/wp-content/uploads/fsqm-files/how-to-get-free-robux-in-roblox-2021-pastebin_GM431946152.pdf
    • http://iba.org.fj/wp-content/uploads/fsqm-files/roblox-invisible-hack-download_GM431946152.pdf
    • http://iba.org.fj/wp-content/uploads/fsqm-files/roblox-it-isint-free_GM431946152.pdf
    • http://iba.org.fj/wp-content/uploads/fsqm-files/nice-things-to-wear-on-roblox-for-free_GM431946152.pdf
    • http://iba.org.fj/wp-content/uploads/fsqm-files/how-to-get-roblox-tickets-hack_GM431946152.pdf
    • http://iba.org.fj/wp-content/uploads/fsqm-files/roblox-free-items-promo-codes_GM431946152.pdf
    • http://iba.org.fj/wp-content/uploads/fsqm-files/cheats-for-the-tales-of-the-ranges-cape-on-roblox_GM431946152.pdf
    • http://iba.org.fj/wp-content/uploads/fsqm-files/how-do-you-get-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ef4.bin
3d433c44253844941135bcda459c1200716c9c4f8d70e908ef6d30eab2122551		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2EF4 22124 bytes
font_01_sfnt_off00005fcf.bin
3e0daaa460a648affb759cb07ad98e68cf69a7ed39f6a6289ff4f35e8518bc86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FCF 19916 bytes

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