Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4245a34d5055d9a…

MALICIOUS

PDF

34.9 KB Created: 2021-06-26 03:57:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1336add466e8801b388bb77be37001d6 SHA-1: ca96a93d0d69f9894ee9d6f8ac542354b8bdd77c SHA-256: c4245a34d5055d9a2b9ee2251b7861da3ea60b297fd4404fadcd63217c2b0b56
142 Risk Score

Malware Insights

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

The document body and extracted URLs indicate a lure related to game cheats and free currency for games like Roblox and Coin Master. The PDF contains a large number of external links, many of which are SEO-optimized and point to similar scam content. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests that the user might be instructed to open a password-protected archive, a common tactic to bypass gateway security.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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-cheat-robux-in-roblox-2021-game-hack
    • http://library.poltekkes-palangkaraya.ac.id/repository/how-to-get-free-money-in-roblox-jailbreak_GM431946152.pdf
    • http://library.poltekkes-palangkaraya.ac.id/repository/free-roblox-accounts-dantdm_GM431946152.pdf
    • http://library.poltekkes-palangkaraya.ac.id/repository/free-spins-coin-master-no-survey_GM406889139.pdf
    • http://library.poltekkes-palangkaraya.ac.id/repository/coin-master-hack-tool-v1-9-download-free_GM406889139.pdf
    • http://library.poltekkes-palangkaraya.ac.id/repository/coin-master-free-spin-group_GM406889139.pdf
    • http://library.poltekkes-palangkaraya.ac.id/repository/hacked-roblox-account-username-and-password_GM431946152.pdf
    • http://library.poltekkes-palangkaraya.ac.id//repository/coin-master-claim-spins_GM406889139.pdf
    • http://library.poltekkes-palangkaraya.ac.id/repository/hack-para-roblox-robux-2021_GM431946152.pdf
    • http://library.poltekkes-palangkaraya.ac.id/repository/free-spin-in-coin-master_GM406889139.pdf
    • http://library.poltekkes-palangkaraya.ac.id/repository/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdf
    • http://library.poltekkes-palangkaraya.ac.id/repository/how-to-hack-roblox-acount-2021_GM431946152.pdf
    • http://library.poltekkes-palangkaraya.ac.id/repository/coin-master-free-spins-gratis_GM406889139.pdf
    • http://library.poltekkes-palangkaraya.ac.id/repository/how-to-get-minecraft-on-chromebook-for-free_GM479516143.pdf
    • http://library.poltekkes-palangkaraya.ac.id/repository/roblox-its-free-roblox-id_GM431946152.pdf
    • http://library.poltekkes-palangkaraya.ac.id/repository/online-coin-master-hack-here_GM406889139.pdf
    • http://library.poltekkes-palangkaraya.ac.id/repository/coin-master-hack-xyz-download-free_GM406889139.pdf
    • http://library.poltekkes-palangkaraya.ac.id/repository/free-robux-without-downloading-anything_GM431946152.pdf
    • http://library.poltekkes-palangkaraya.ac.id//repository/coin-master-free-spins-ios_GM406889139.pdf
    • http://library.poltekkes-palangkaraya.ac.id/repository/how-to-get-coin-master-free-spins-in-email_GM406889139.pdf
    • http://library.poltekkes-palangkaraya.ac.id/repository/pubg-uc-qiymtlri_GM1330123889.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000306b.bin
e14de9e038cb9baa8ca2929144a9971b31202d6a6945e3fc7766620360914286		 pdf-font-stream PDF embedded font (sfnt) at offset 0x306B 22352 bytes
font_01_sfnt_off00006213.bin
36ac185aa2e6096528cc000a7f5bd1e21ba0b6ba43a0e2c2d463d4e637a73610		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6213 19464 bytes

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