Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d295836f7228bf3…

MALICIOUS

PDF

46.0 KB Created: 2021-05-11 06:32:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 31e0379e2c81c9f58f8ad458d3594fa7 SHA-1: 3c9adfe6acab6b0eb9901c999bf7c7ebeb5b5c45 SHA-256: 8d295836f7228bf39841405547c7f3d914187bbd7783ce09b43f3e25713f5ffa
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to free game currency and hacks, directing users to a suspicious URL. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to potentially malicious content or phishing pages. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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/431946152/how-to-change-roblox-username-for-free-2021-game-hack PDF link annotation
    • http://maxvanberchem.org/images/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • http://maxvanberchem.org/images/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://maxvanberchem.org/images/how-to-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://maxvanberchem.org/images/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://maxvanberchem.org/images/coin-master-free-spin-software_GM406889139.pdfIn PDF document text
    • http://maxvanberchem.org/images/how-to-get-free-unlimited-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://maxvanberchem.org/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://maxvanberchem.org/images/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • http://maxvanberchem.org/images/free-spins-generated-from-coin-master_GM406889139.pdfIn PDF document text
    • http://maxvanberchem.org/images/roblox-generator-com_GM431946152.pdfIn PDF document text
    • http://maxvanberchem.org/images/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://maxvanberchem.org/images/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://maxvanberchem.org/images/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://maxvanberchem.org/images/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://maxvanberchem.org/images/coin-master-hack-version-33-2_GM406889139.pdfIn PDF document text
    • http://maxvanberchem.org/images/roblox-t-shirt-free_GM431946152.pdfIn PDF document text
    • http://maxvanberchem.org/images/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://maxvanberchem.org/images/coin-master-free-card-link-today_GM406889139.pdfIn PDF document text
    • http://maxvanberchem.org/images/coin-master-hack-xyz-download_GM406889139.pdfIn PDF document text
    • http://maxvanberchem.org/images/minecraft-alt-accounts-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000494e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x494E 25432 bytes
SHA-256: 14897d22b22335b08ea972c50fde65f2f32478a5c71c721a564fe156885574a5
font_01_sfnt_off0000832c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x832C 2884 bytes
SHA-256: d448cfd84e275523cbfcbfbe5167a4b015c1bdf36b9fe126d324722683cf8ece
font_02_sfnt_off00008d1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D1E 19644 bytes
SHA-256: bf7704042115058311276e91f581871491bc3524547d766b0e7085d334bb6686

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