Malicious PDF — malware analysis report

Static analysis result for SHA-256 04d35c9acb1f49c6…

MALICIOUS

PDF

34.7 KB Created: 2021-06-26 01:30:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a388d51287d0085caae65741af9a46ff SHA-1: af1833f3f75f0d22486aea60060e54a10599fba0 SHA-256: 04d35c9acb1f49c691c1a7f892a7d39998c41bb80cbe252153753690fe13e4bb
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a link farm, strongly suggesting it is designed to redirect users to malicious websites. The ML classifier also flagged this PDF as malicious with high confidence. The document body and embedded links promote 'free Robux' and game hacks, a common lure for phishing and malware distribution.

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/roblox-free-robux-hack-no-survey-no-download-2021-game-hack
    • https://unsla.uns.ac.id:443/pgsd/repository/free-robux-gift-card-codes-2021-not-used_GM431946152.pdf
    • https://unsla.uns.ac.id:443/pgsd/repository/robux-free-hack-no-verification_GM431946152.pdf
    • https://unsla.uns.ac.id:443/pgsd/repository/coin-master-free-spins-hack-iphone_GM406889139.pdf
    • https://unsla.uns.ac.id:443/pgsd/repository/robux-free-gift-card_GM431946152.pdf
    • https://unsla.uns.ac.id:443/pgsd/repository/all-the-hacking-games-on-roblox_GM431946152.pdf
    • https://unsla.uns.ac.id:443/pgsd/repository/minecraft-116-apk-download_GM479516143.pdf
    • https://unsla.uns.ac.id:443/pgsd/repository/coin-master-free-spin-and-coin_GM406889139.pdf
    • https://unsla.uns.ac.id:443/pgsd/repository/coin-master-hack-apk-2021-download_GM406889139.pdf
    • https://unsla.uns.ac.id:443/pgsd/repository/robux-free-com_GM431946152.pdf
    • https://unsla.uns.ac.id:443/pgsd/repository/how-to-hack-any-roblox-account_GM431946152.pdf
    • https://unsla.uns.ac.id:443/pgsd/repository/robloxmatchcom-free-robux_GM431946152.pdf
    • https://unsla.uns.ac.id:443/pgsd/repository/free-robux-codes-2021-real_GM431946152.pdf
    • https://unsla.uns.ac.id:443/pgsd/repository/claim-free-spins-coin-master_GM406889139.pdf
    • https://unsla.uns.ac.id:443/pgsd/repository/roblox-hack-robux-apk-download_GM431946152.pdf
    • https://unsla.uns.ac.id:443/pgsd/repository/roblox-free-toy-codes-2021_GM431946152.pdf
    • https://unsla.uns.ac.id:443/pgsd/repository/robux-matchcomfree-robux_GM431946152.pdf
    • https://unsla.uns.ac.id:443/pgsd/repository/coin-master-free-spins-link-today-hack_GM406889139.pdf
    • https://unsla.uns.ac.id:443/pgsd/repository/free-codes-for-roblox-nfl-2_GM431946152.pdf
    • https://unsla.uns.ac.id:443/pgsd/repository/free-minecraft-hacks_GM479516143.pdf
    • https://unsla.uns.ac.id:443/pgsd/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fd4.bin
9354ddf33341fccfdd18b25510d75880141f523032f94ea529e47cf6aa79bcb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2FD4 21720 bytes
font_01_sfnt_off00005f33.bin
40ccbdc8d639fec822df205060800b2cb2108fb92c02f86607e40267aa942a44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F33 20164 bytes

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