Malicious PDF — malware analysis report

Static analysis result for SHA-256 56d55cdc4292a3b0…

MALICIOUS

PDF

35.1 KB Created: 2021-06-29 22:07:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 077439918f3d56fabda07ee81552fca0 SHA-1: c21f074555a90f7214048dc5f7c312b7aa9215a3 SHA-256: 56d55cdc4292a3b0d8ab13371d95ce1039ea31efd1ec59438cd649da200a577e
102 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized and point to pages offering game cheats and virtual currency. The ML classifier strongly indicated maliciousness, and the presence of a download button lure reinforces the intent to trick users into clicking malicious links. The document's primary purpose appears to be a link farm designed to drive traffic 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/free-nfl-skin-in-roblox-game-hack
    • http://www.alajwakh.com/uploaded_files/userfiles/files/how-to-get-free-robux-on-android_GM431946152.pdf
    • http://www.alajwakh.com/uploaded_files/userfiles/files/hackear-coin-master-sin-verificacion_GM406889139.pdf
    • http://www.alajwakh.com/uploaded_files/userfiles/files/free-roblox-gift-card-codes-2021_GM431946152.pdf
    • http://www.alajwakh.com/uploaded_files/userfiles/files/how-to-hack-peoples-roblox-accounts_GM431946152.pdf
    • http://www.alajwakh.com/uploaded_files/userfiles/files/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdf
    • http://www.alajwakh.com/uploaded_files/userfiles/files/cm-free-spins-and-coins_GM406889139.pdf
    • http://www.alajwakh.com/uploaded_files/userfiles/files/roblox-build-a-boat-hack-nopde_GM431946152.pdf
    • http://www.alajwakh.com/uploaded_files/userfiles/files/unlimited-robux_GM431946152.pdf
    • http://www.alajwakh.com/uploaded_files/userfiles/files/how-to-get-free-robux-easy-no-download_GM431946152.pdf
    • http://www.alajwakh.com/uploaded_files/userfiles/files/minecraft-free-unblocked_GM479516143.pdf
    • http://www.alajwakh.com/uploaded_files/userfiles/files/coin-master-hack-apk-35-13_GM406889139.pdf
    • http://www.alajwakh.com/uploaded_files/userfiles/files/free-coin-master-spins-blog_GM406889139.pdf
    • http://www.alajwakh.com/uploaded_files/userfiles/files/coin-master-hack-apk-2021-download_GM406889139.pdf
    • http://www.alajwakh.com/uploaded_files/userfiles/files/300-free-spins-coin-master_GM406889139.pdf
    • http://www.alajwakh.com/uploaded_files/userfiles/files/how-to-hack-someone-on-roblox_GM431946152.pdf
    • http://www.alajwakh.com/uploaded_files/userfiles/files/free-roblox-giveaway-accounts_GM431946152.pdf
    • http://www.alajwakh.com/uploaded_files/userfiles/files/where-is-the-hacking-station-roblox_GM431946152.pdf
    • http://www.alajwakh.com/uploaded_files/userfiles/files/free-robux-hack_GM431946152.pdf
    • http://www.alajwakh.com/uploaded_files/userfiles/files/coin-master-hack-programmers_GM406889139.pdf
    • http://www.alajwakh.com/uploaded_files/userfiles/files/how-to-get-any-roblox-item-free_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000032ad.bin
65185ba2a12dd45e89068d95b0b5d6656a10d2a5f25dd5f8093203be4142becf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x32AD 22388 bytes
font_01_sfnt_off0000646e.bin
02463af34810506d500f33fc67021785b5733108ee89076f0000e6e5b2507f2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x646E 18940 bytes

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