Malicious PDF — malware analysis report

Static analysis result for SHA-256 d42bd05d6fffc936…

MALICIOUS

PDF

36.0 KB Created: 2021-05-22 03:04:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: a9001aa6febf26b6b3a575ad0725887c SHA-1: e93d2f6544770c7f7bdf50d256423d9c0b9b03ca SHA-256: d42bd05d6fffc936dbc43d7490763725601a0b80a4c11536a7a0ca01d2eff5ed
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 0.9492

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-roblox-game-hack PDF link annotation
    • http://solidcom.ch/images/easy-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://solidcom.ch/images/cute-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • http://solidcom.ch/images/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://solidcom.ch/images/coin-master-village-cost_GM406889139.pdfIn PDF document text
    • http://solidcom.ch/images/roblox-free-draw_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003150.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3150 25472 bytes
SHA-256: e5be0ce72ef8ca492e8b3cdfb84b3fe9bd2b733b6f9f2bbb9a8ca196736f0044
font_01_sfnt_off00006af2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF2 18344 bytes
SHA-256: 73440050ee62d9c8dc97d7cf0d13859b5ca63a66159f36279ab18a86d0bf293f

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