Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c8ab8cb4f92c305…

MALICIOUS

PDF

45.0 KB Created: 2021-05-21 14:15:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: dfe8da2aed5cc0db667ebdebf0a7d46e SHA-1: 10362e2e2398e2c6063d8e10c153fc92a7aff4ef SHA-256: 1c8ab8cb4f92c305e1a2fbb8de67146399f65ff764740a3dcdc002b97494809f
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 0.7947

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-hack-in-roblox-prison-life-game-hack PDF link annotation
    • http://www.copoint.co.uk/images/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/getrobux-ninja_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/daily-free-spins-for-coin-master_GM406889139.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_002_off00003279.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3279 26736 bytes
SHA-256: 056f446fb9b7bcfc48427d09ebc1ec987d96ad02eb558ef129bfb14088a9c126
font_01_sfnt_off00007033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7033 4660 bytes
SHA-256: b8980cdac4d025496d9fe039d8c05bb5b9bae1b804244a1f9c05e9663db72816
font_02_sfnt_off0000803e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x803E 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off00008d4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D4F 18620 bytes
SHA-256: 06c4a0a22987171f64eaf6d898502a0ddf1128172b72fd679b67faae34548247

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