Malicious PDF — malware analysis report

Static analysis result for SHA-256 cba2fead57da1013…

MALICIOUS

PDF

43.6 KB Created: 2021-05-17 01:36:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4e645a3065af114b64893ad4ce398a88 SHA-1: 10301f4bce42ed8bf44687026d6a1a20e56c1451 SHA-256: cba2fead57da10137e85c06cf2380f899dd84d2b01628aa3109834e95204f914
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link that redirects to a URL associated with game hacks, indicating a social engineering lure. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it is designed to redirect users to potentially malicious content, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/free-spin-coin-master-online-game-hack PDF link annotation
    • http://armportal.co.uk/images/coin-master-hack-version-2021_GM406889139.pdfIn PDF document text
    • http://armportal.co.uk/images/free-robux-real-working_GM431946152.pdfIn PDF document text
    • http://armportal.co.uk/images/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • http://armportal.co.uk/images/coin-master-official-website_GM406889139.pdfIn PDF document text
    • http://armportal.co.uk/images/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://armportal.co.uk/images/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://armportal.co.uk/images/coin-master-free-spins-daily-1-ga_GM406889139.pdfIn PDF document text
    • http://armportal.co.uk/images/minecraft-bedrock-download_GM479516143.pdfIn PDF document text
    • http://armportal.co.uk/images/minecraft-pocket-edition-free-apk_GM479516143.pdfIn PDF document text
    • http://armportal.co.uk/images/how-to-get-free-pet-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://armportal.co.uk/images/coin-master-free-500-spins-link_GM406889139.pdfIn PDF document text
    • http://armportal.co.uk/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://armportal.co.uk/images/free-spins-coin-master-2021-glitch_GM406889139.pdfIn PDF document text
    • http://armportal.co.uk/images/free-minecraft-codes_GM479516143.pdfIn PDF document text
    • http://armportal.co.uk/images/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://armportal.co.uk/images/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://armportal.co.uk/images/coin-master-exchange-40-free-spins_GM406889139.pdfIn PDF document text
    • http://armportal.co.uk/images/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://armportal.co.uk/images/coin-master-codes_GM406889139.pdfIn PDF document text
    • http://armportal.co.uk/images/free-spin-coin-master-hack-2021_GM406889139.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_off0000482c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x482C 24184 bytes
SHA-256: a8d98e360d7a08ea02b68ed4f48cbd0208af646b7b585f2ebe0ab5358532b7bd
font_01_sfnt_off00007ec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EC3 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off000088ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88AE 17960 bytes
SHA-256: 74290823a42a0e75a5f3b604468006cc436fdd58a7c76d339be163c45ff8bb63

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