Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a0e070ec53adbbd…

MALICIOUS

PDF

34.7 KB Created: 2021-07-03 23:44:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b2e080824b887cf3f0e51fde1d8819d8 SHA-1: ff2012c11c61da2da449a1f180fe5cbd8cff3782 SHA-256: 3a0e070ec53adbbdc6c67e7e0df01b0f8022d80fcff07bd5b725d81ec3070e15
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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/download-coin-master-apk-hacked-game-hack PDF link annotation
    • https://mountainholidaytreks.com/userfiles/files/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/game-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-robux-that-works-2021_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/coin-master-free-spins-link-fb_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/minecraft-hacker-mask_GM479516143.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/tiktok-free-download-for-android_GM835599320.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-robux-just-enter-username_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/hack-coin-master-using-pc_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/hack-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/robux-hack-tools_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/roblox-fun-com-free-robux_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_off00003041.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3041 22864 bytes
SHA-256: 21c0e56f486cf8f2a91359cebfc491c68ac57d6c539542b253a44de8b1c55685
font_01_sfnt_off0000636a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x636A 18760 bytes
SHA-256: 730ee1d96cda19f7c4a03b449f27cedd631d74d7639b5d8272a7d4c4d2e1f6fc

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