Malicious PDF — malware analysis report

Static analysis result for SHA-256 af1437d4da9cc010…

MALICIOUS

PDF

35.5 KB Created: 2021-07-08 00:56:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 78548fe09a5eea59ae3c6617af347265 SHA-1: 7e76295cebfbf162cb207c36864eda3cbfb108c6 SHA-256: af1437d4da9cc01007b724f40d673166d3ecfec6cdc66cded4aa0c88615032a9
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a lure for a game hack, directing users to the URL http://netcdn.tw/app/406889139/coin-master-hack-android-2021-game-hack. The ML classifier strongly indicated maliciousness, and the document body and heuristics confirm a redirection to a potentially malicious site. No scripts were extracted, but the PDF structure and embedded URLs suggest a phishing or malware distribution attempt.

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-hack-android-2021-game-hack PDF link annotation
    • https://allhimalayantreks.com/userfiles/files/game-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-free-spins-ios_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/roblox-piano-hack_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-roblox-pins_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-free-spins-and-coins-without-human-verification_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-fire-coin-master_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/how-to-get-free-hats-on-roblox_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/mcpe-com_GM479516143.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-fan-page-facebook_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/how-to-get-free-hair-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/mobile-hack-roblox-robux_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-robux-website-linkmon_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
stream_002_off00003391.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3391 22892 bytes
SHA-256: 0c354e193e9eea0883c9da7283bcff92d25617f0c5d15b684d61d95320ba0d1f
font_01_sfnt_off000066e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66E7 18580 bytes
SHA-256: e1eb252879878bc6c6be22e70e77f532303e52474717b0bf3300728c29bf13dd

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