Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c8bf9c3b59d68c6…

MALICIOUS

PDF

41.3 KB Created: 2021-05-22 10:36:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 7d756fcd8058d54989fed6333b760607 SHA-1: 623c2046cf58ecb5da7f4bd13ded41f569b4b6e3 SHA-256: 9c8bf9c3b59d68c6a8a5c1c8a83f9bd73225c46a18b11bf8de4724fe7fa5fa0f
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 0.7409

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-get-robux-for-free-2021-game-hack PDF link annotation
    • http://dqdq.pl/images/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://dqdq.pl/images/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://dqdq.pl/images/coin-master-links-that-don-t-expire_GM406889139.pdfIn PDF document text
    • http://dqdq.pl/images/coin-master-lucky-patcher-hack_GM406889139.pdfIn PDF document text
    • http://dqdq.pl/images/coin-master-free-coins-link_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_002_off000034bd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34BD 26492 bytes
SHA-256: 8fd337717603a2c681dac72f7afc394957f508fd5ef8ba542a81f227f6f9fca2
font_01_sfnt_off000071ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71EF 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off00007e97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E97 18684 bytes
SHA-256: 65f445f0396e54760dd2a1edc1744209422bc48f29c35ea74a9bcb72e79f8b06

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