Malicious PDF — malware analysis report

Static analysis result for SHA-256 af3551cabb69858e…

MALICIOUS

PDF

47.5 KB Created: 2021-05-16 06:15:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b01129e726db3c6e87b105d213addec7 SHA-1: aa3de570c2b648b9589313f37aedd614519f8f8a SHA-256: af3551cabb69858ebcf5292f0ea582fca1a32e3d9b46dda8a72e427b63b9989d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple heuristics indicating a lure for game hacks and redirects to external URLs. The document body, though malformed, contains references to 'Coin Master Hack App' and a URL that aligns with this theme. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8715

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 https://netcdn.xyz/app/406889139/coin-master-hack-app-android-game-hack PDF link annotation
    • http://gruporamos.do/images/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/free-roblox-gear_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • http://gruporamos.do/images/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • http://gruporamos.do/images/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/roblox-redeem_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/javascript-free-robux_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/hack-robux_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://gruporamos.do/images/freespinandcoin_GM406889139.pdfIn PDF document text
    • http://gruporamos.do/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://gruporamos.do/images/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://gruporamos.do/images/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • http://gruporamos.do/images/free-robux-app-real_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004694.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4694 24956 bytes
SHA-256: 83c6eae10753b75f15eda5f48ee5be53db4284eb16829e3eb46c8ece67d7cd94
font_01_sfnt_off00007fea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FEA 4028 bytes
SHA-256: a17c2a746d49ac23b23e38a371e32fddecfcd91b10cf42ff6155bff6b8a07e91
font_02_sfnt_off00008d8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D8B 2788 bytes
SHA-256: 6fd7c7f447d66842f81aa8cf197935b17f22157d0c7e9f95622df1b5b4ddf530
font_03_sfnt_off0000977b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x977B 18068 bytes
SHA-256: 826b659b6d6a919198e40a4f05f943b2342615ea87152df5852563aa56c598f0

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