Malicious PDF — malware analysis report

Static analysis result for SHA-256 80145d1cbd823b50…

MALICIOUS

PDF

37.3 KB Created: 2021-05-23 06:13:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 839597c4c086fbdf0376f08a15977cce SHA-1: 299ab418c1e8e3a96f72569fb5f29e0437c0e7d0 SHA-256: 80145d1cbd823b500f3d3c080035147d99d415cafffec2301e2a9bd2c4e03ef1
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 0.9447

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/coin-master-claim-free-spins-game-hack PDF link annotation
    • http://tc-kulmbach.de/images/free-tiktok-followers-without-human-verification-2021_GM835599320.pdfIn PDF document text
    • http://tc-kulmbach.de/images/coin-master-2021-free-spins_GM406889139.pdfIn PDF document text
    • http://tc-kulmbach.de/images/free-minecraft-skins-pe_GM479516143.pdfIn PDF document text
    • http://tc-kulmbach.de/images/hackear-coin-master-sin-root_GM406889139.pdfIn PDF document text
    • http://tc-kulmbach.de/images/free-robux-script_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_off0000341e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x341E 26388 bytes
SHA-256: 8be82bffdc043e6aff1b2b29e76b8ff97e3b66f00d0b129a23321efaecb098e9
font_01_sfnt_off000070f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70F5 18220 bytes
SHA-256: 4508a7247666ecd7f475af3e2510e2d7297b60fda6d209b486c2dc6be28a63e8

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