Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b522a9f3e7d41dc…

MALICIOUS

PDF

36.3 KB Created: 2021-05-20 21:46:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c069fb266e72255617ef748878172145 SHA-1: 6c8cc84ec7ca87e028567b43bf61b6a32553f1b4 SHA-256: 9b522a9f3e7d41dce78c3e1dccbe371249f27409edcca420b71f06ea949b9b2d
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/479516143/minecraft-pocket-edition-free-download-game-hack PDF link annotation
    • http://casabea.de/images/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://casabea.de/images/minecraft-pe-apk-free-download_GM479516143.pdfIn PDF document text
    • http://casabea.de/images/is-there-any-tricks-or-working-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://casabea.de/images/roblox-moderators_GM431946152.pdfIn PDF document text
    • http://casabea.de/images/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://discord.ggIn 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_off000033ff.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33FF 24652 bytes
SHA-256: 46ce701c46d208cc4413b9c0b256c7dfda689b2c128056f3bd13320823109d85
font_01_sfnt_off00006bd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BD9 18616 bytes
SHA-256: 74c3d0dac38db02fae044005a19145e6493ffdefda41676fc7dac63f0b05f007

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