Malicious PDF — malware analysis report

Static analysis result for SHA-256 c068cd0a2793be3d…

MALICIOUS

PDF

45.5 KB Created: 2021-05-15 01:13:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 177156eb32b221572e873dd3f53b22d4 SHA-1: 7b4dc767d8951594ca84662f52de25d9aea58347 SHA-256: c068cd0a2793be3d10e37f67a8df0e3b742b1ebefd1eeacfa9c80c4ac322003b
82 Risk Score

Malware Insights

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

The PDF document contains multiple links and embedded URLs that lead to sites offering game-related cheats and rewards, such as "free spins" for Coin Master and "free robux" for Roblox. The presence of a visually-presented download button and the ML classifier's high confidence score indicate a malicious intent to trick users into downloading further potentially harmful content. The document's structure and content strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

Heuristics 4

  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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/coin-master-free-spin-link-today-2021-game-hack
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/roblox-hack-me-robux_GM431946152.pdf
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/free-daily-spins-coin-master_GM406889139.pdf
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/free-robux-with-no-human-verification_GM431946152.pdf
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/coin-and-spin-link_GM406889139.pdf
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/free-robux-no-human-verification-no-survey_GM431946152.pdf
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/roblox-land-free-robux_GM431946152.pdf
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/free-spins-coin-master-hack-2021_GM406889139.pdf
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/roblox-com-free-robux_GM431946152.pdf
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/coin-master-free-spins-reddit_GM406889139.pdf
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/roblox-free-pets_GM431946152.pdf
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/fbchampion_GM406889139.pdf
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/free-coin-master-gifts_GM406889139.pdf
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/free-roblox-gift-card_GM431946152.pdf
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/how-to-get-free-coins-on-coin-master_GM406889139.pdf
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/robux-boost_GM431946152.pdf
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/can-u-get-free-robux_GM431946152.pdf
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/se-puede-hackear-coin-master_GM406889139.pdf
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/pop-slots-free-vegas-casino-slots-machine-game-coin-master_GM406889139.pdf
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/freespinandcoinblogspotcom-2021-11-coinmasterfreespinandcoinlinkshtml_GM406889139.pdf
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/how-to-hack-roblox-passwords_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004bba.bin
5eabce748601c6f33bb823c23ce9e5a1b980a5c1ef8bdaee9f850a7a0a82c3e9		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BBA 24488 bytes
font_01_sfnt_off0000840a.bin
381f6d859be141449dd645f7be1484d2a1cf49218dc471b402dae69eaa2b11d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x840A 2824 bytes
font_02_sfnt_off00008dad.bin
209d45ed87732d827821998a5283e56b95c39a3af4032faff2e6da7d3e76f78f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DAD 18812 bytes

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