Malicious PDF — malware analysis report

Static analysis result for SHA-256 b744e8d44874600a…

MALICIOUS

PDF

31.7 KB Created: 2021-07-04 16:31:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 2d9e07d3b54b365cae641b8688137f44 SHA-1: 10dcab8f5787facc1658188397099b7959c7e78f SHA-256: b744e8d44874600afec1100a31bab98ce6f73f3487b58685f4ba7aa7633c09d6
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.tw/app/406889139/free-daily-spins-coin-master-2021-game-hack. The document body and embedded URLs suggest a lure for game-related cheats or currency, a common tactic for phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitates redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 3

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.tw/app/406889139/free-daily-spins-coin-master-2021-game-hack In PDF document text
    • https://tv-transvision.com/ckfinder/userfiles/files/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://tv-transvision.com/ckfinder/userfiles/files/coin-master-reward-link_GM406889139.pdfIn PDF document text
    • https://tv-transvision.com/ckfinder/userfiles/files/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://tv-transvision.com/ckfinder/userfiles/files/free-spin-coin-master-instagram_GM406889139.pdfIn PDF document text
    • https://tv-transvision.com/ckfinder/userfiles/files/www-roblox-cheatuscom_GM431946152.pdfIn PDF document text
    • https://tv-transvision.com/ckfinder/userfiles/files/roblox-free-bundles_GM431946152.pdfIn PDF document text
    • https://tv-transvision.com/ckfinder/userfiles/files/alone-battle-roytale-roblox-hacks-script-copy-aimbot-esp_GM431946152.pdfIn PDF document text
    • https://tv-transvision.com/ckfinder/userfiles/files/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • https://tv-transvision.com/ckfinder/userfiles/files/monkey-free-robux_GM431946152.pdfIn PDF document text
    • https://tv-transvision.com/ckfinder/userfiles/files/coin-master-hack-pc_GM406889139.pdfIn PDF document text
    • https://tv-transvision.com/ckfinder/userfiles/files/minecraft-name-tag-hacks_GM479516143.pdfIn PDF document text
    • https://tv-transvision.com/ckfinder/userfiles/files/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • https://tv-transvision.com/ckfinder/userfiles/files/free-tiktok-followers-no-human-verification_GM835599320.pdfIn PDF document text
    • https://tv-transvision.com/ckfinder/userfiles/files/roblox-how-to-get-stuff-for-free_GM431946152.pdfIn PDF document text
    • https://tv-transvision.com/ckfinder/userfiles/files/free-mermaid-halo-roblox-royale-high_GM431946152.pdfIn PDF document text
    • https://tv-transvision.com/ckfinder/userfiles/files/robux-apk_GM431946152.pdfIn PDF document text
    • https://tv-transvision.com/ckfinder/userfiles/files/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://tv-transvision.com/ckfinder/userfiles/files/how-to-get-admin-on-roblox-2021-no-hacks_GM431946152.pdfIn PDF document text
    • https://tv-transvision.com/ckfinder/userfiles/files/how-to-make-a-group-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://tv-transvision.com/ckfinder/userfiles/files/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003131.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3131 23224 bytes
SHA-256: f47b581668878db49d368d525742f13a30c578650b5861c86ff6b388ba4a66b5

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