Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0c767ea6a45d640…

MALICIOUS

PDF

47.7 KB Created: 2021-05-16 13:11:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b2a982f3b16af535eacba758dd5063c7 SHA-1: dcf546a5aedbe82d83233d0c186204bc9e52cae4 SHA-256: b0c767ea6a45d640057d5a294d144599bec63da20e563e588530ececcb2498a9
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which are related to "Coin Master" and "Robux" hacks, suggesting a lure for users seeking cheats or exploits. The ML classifier also flagged this PDF as malicious with high confidence. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate that this document is likely part of a link farm designed to redirect users to potentially malicious content or download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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 https://netcdn.xyz/app/406889139/free-spin-link-coin-master-game-hack
    • https://allhimalayantreks.com/userfiles/files/how-to-hack-coin-master-with-game-guardian_GM406889139.pdf
    • https://allhimalayantreks.com/userfiles/files/coin-master-hack-review_GM406889139.pdf
    • https://allhimalayantreks.com/userfiles/files/codes-to-get-free-robux_GM431946152.pdf
    • https://allhimalayantreks.com/userfiles/files/uprobuxcom-free-robux_GM431946152.pdf
    • https://allhimalayantreks.com/userfiles/files/free-roblox-generator_GM431946152.pdf
    • https://allhimalayantreks.com/userfiles/files/can-you-actually-get-free-robux_GM431946152.pdf
    • https://allhimalayantreks.com/userfiles/files/get-free-robux-no-verification_GM431946152.pdf
    • https://allhimalayantreks.com/userfiles/files/free-spin-hack-coin-master-2021_GM406889139.pdf
    • https://allhimalayantreks.com/userfiles/files/coin-master-app-for-free-spins_GM406889139.pdf
    • https://allhimalayantreks.com/userfiles/files/como-hackear-coin-master-espaol_GM406889139.pdf
    • https://allhimalayantreks.com/userfiles/files/hacks-for-coin-master-game_GM406889139.pdf
    • https://allhimalayantreks.com/userfiles/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdf
    • https://allhimalayantreks.com/userfiles/files/how-to-get-robux-for-free-2021_GM431946152.pdf
    • https://allhimalayantreks.com/userfiles/files/coin-master-free-spins-hack-iphone_GM406889139.pdf
    • https://allhimalayantreks.com/userfiles/files/free-roblox-accounts-with-builders-club_GM431946152.pdf
    • https://allhimalayantreks.com/userfiles/files/coin-master-bonus_GM406889139.pdf
    • https://allhimalayantreks.com/userfiles/files/roblox-promo-code-to-get-free-robux_GM431946152.pdf
    • https://allhimalayantreks.com/userfiles/files/free-robux-generator-no-survey_GM431946152.pdf
    • https://allhimalayantreks.com/userfiles/files/com-roblox_GM431946152.pdf
    • https://allhimalayantreks.com/userfiles/files/minecraft-images-free_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00005184.bin
ceda5cb41bad1b47316db6348f533f7defc003b3728bdd0f42a26f6eb785665e		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5184 25512 bytes
font_01_sfnt_off00008b80.bin
dbaa9c12d07f3632734605f1d5d6dee3ad5af1f57488e46d95dab68b383f08c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B80 4020 bytes
font_02_sfnt_off00009907.bin
5e0e5252c5991e876b89620e8fc451db275611f7bed2c8d0b16d9c89ed4fe559		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9907 18056 bytes

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