Malicious PDF — malware analysis report

Static analysis result for SHA-256 a76cd4bbb7ec0710…

MALICIOUS

PDF

36.4 KB Created: 2021-07-04 12:00:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 423aed295984fc00213ed1d61f4a0596 SHA-1: aa1bdc74591097e837197e0182a767d6a48f47f1 SHA-256: a76cd4bbb7ec07107e42d18c059a5bec7fb9741a539819c2c4aca4fcb4dd5ed4
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of external links, many of which are SEO-optimized and point to sites offering free in-game currency or items for popular games like Coin Master and Roblox. The document body and embedded links suggest a lure for users seeking such items, which is a common tactic for phishing or malware distribution. 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.tw/app/406889139/coin-master-daily-free-spins-link-today-facebook-game-hack
    • https://allhimalayantreks.com/userfiles/files/get-free-robux-for-free_GM431946152.pdf
    • https://allhimalayantreks.com/userfiles/files/roblox-free-font-download_GM431946152.pdf
    • https://allhimalayantreks.com/userfiles/files/coin-master-free-coins-generator_GM406889139.pdf
    • https://allhimalayantreks.com/userfiles/files/free-roebucks_GM431946152.pdf
    • https://allhimalayantreks.com/userfiles/files/roblox-pink-free-robux_GM431946152.pdf
    • https://allhimalayantreks.com/userfiles/files/free-realistic-minecraft-texture-packs_GM479516143.pdf
    • https://allhimalayantreks.com/userfiles/files/coin-master-free-spin-today-2021_GM406889139.pdf
    • https://allhimalayantreks.com/userfiles/files/coin-master-hack-tool-pc_GM406889139.pdf
    • https://allhimalayantreks.com/userfiles/files/dayz-3-beta-roblox-cheats-cods_GM431946152.pdf
    • https://allhimalayantreks.com/userfiles/files/coin-master-free-spins-daily_GM406889139.pdf
    • https://allhimalayantreks.com/userfiles/files/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdf
    • https://allhimalayantreks.com/userfiles/files/how-to-hack-the-cart-in-roblox-limber-ticoon_GM431946152.pdf
    • https://allhimalayantreks.com/userfiles/files/free-robux-no-human-verification-for-android_GM431946152.pdf
    • https://allhimalayantreks.com/userfiles/files/download-roblox-free-ps4_GM431946152.pdf
    • https://allhimalayantreks.com/userfiles/files/roblox-font-free_GM431946152.pdf
    • https://allhimalayantreks.com/userfiles/files/best-way-to-get-free-robux_GM431946152.pdf
    • https://allhimalayantreks.com/userfiles/files/how-to-add-mods-to-minecraft-pe_GM479516143.pdf
    • https://allhimalayantreks.com/userfiles/files/how-to-get-free-robux-without-any-verification_GM431946152.pdf
    • https://allhimalayantreks.com/userfiles/files/roblox-com-free-robux_GM431946152.pdf
    • https://allhimalayantreks.com/userfiles/files/free-robux-generator_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003795.bin
b1b28e0db9d5cd6d888dfa87d56598e349754790f0e2bec11645aab70be36f35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3795 22388 bytes
font_01_sfnt_off0000695d.bin
10262a12b6a93a5eb401f2bda0e6b10a20895a2a64ebc159cb68bc6fd556a7cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x695D 19100 bytes

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