Malicious PDF — malware analysis report

Static analysis result for SHA-256 1df9d227517e31ac…

MALICIOUS

PDF

40.3 KB Created: 2021-05-20 22:18:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 4c63a6a4d9593a82386838e7ba4da9fc SHA-1: de66622622c6e6c6aaccb3febe15711ee506f2f6 SHA-256: 1df9d227517e31aca9024dfe79937dd2d5a1a8c5ea4e70915b67d0950165cb0c
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 0.7829

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-free-robux-com-game-hack PDF link annotation
    • http://danielkleiboemer.de/images/free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://danielkleiboemer.de/images/free-robux-pins_GM431946152.pdfIn PDF document text
    • http://danielkleiboemer.de/images/tiktok-likes-free_GM835599320.pdfIn PDF document text
    • http://danielkleiboemer.de/images/rewards-roblox_GM431946152.pdfIn PDF document text
    • http://danielkleiboemer.de/images/coin-master-hack-apk-33-download_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_off0000337d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x337D 26380 bytes
SHA-256: f3cb6177c280c492a1018612b5c7d31299809a6076d5e82451aa6433bd6b832b
font_01_sfnt_off000070a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70A7 3012 bytes
SHA-256: 0eac32074ede5a7137204e636ea7e2fd9426c3d3d5e7ff020b1898996628efce
font_02_sfnt_off00007b1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B1D 18544 bytes
SHA-256: 592d037155b891bbb2f70d3f14a8a619d2fef64eb32d8f0fc2e46f6e8e925839

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