Malicious PDF — malware analysis report

Static analysis result for SHA-256 b67f763b6d11a233…

MALICIOUS

PDF

34.2 KB Created: 2021-07-03 20:09:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e6556854fa3c98f7d1c179744d575d35 SHA-1: 44ecb03bac3d98f9bd64f8868f88faa79eea506c SHA-256: b67f763b6d11a23357b64da1019913d56b15100e88fcf4df1553d4e66f2becdd
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a 'Coin Master Free Spins 2021 Generator' and links to external URLs that are likely part of a scam or malware distribution chain. The ML classifier strongly indicated maliciousness, and the presence of game hack lures is a common tactic for phishing or malware delivery. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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.tw/app/406889139/coin-master-free-spins-2021-generator-game-hack PDF link annotation
    • https://learnwmf.org/image/data/files/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/como-hackear-coin-master-sin-verificacion-humana_GM406889139.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/coin-master-hack-spins-apk_GM406889139.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/how-to-get-free-spins-on-coin-master-android_GM406889139.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/free-robux-apk_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/aimbot-hack-for-roblox-phantom-forces-for-download_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/https-webrobloxcom-games-2021202177-creeperawwman14-hack_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/roblox-ftw_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/free-script-executor-roblox-2021-no-virus_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/when-was-minecraft-free_GM479516143.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/free-robux-legit-2021_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/get-robux_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/roblox-free-hat-codes_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/hack-coin-master-dzooka_GM406889139.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/how-do-i-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ff6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FF6 22548 bytes
SHA-256: c419f97a48385ee25fe40edf0b958e38a2e13f8666b584dadd6a718c3dd4f674
font_01_sfnt_off00006227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6227 18576 bytes
SHA-256: 8a021cd21fa26644957b65d1dffcbe13fd759d196cbdb5d0f528b52a78811c6a

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