Malicious PDF — malware analysis report

Static analysis result for SHA-256 899a2138264d9150…

MALICIOUS

PDF

34.7 KB Created: 2021-05-21 12:30:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: f5e7dd1b2bd4b7c7cb3c29b9f8ac7c02 SHA-1: 592644a91a57ee9729a4ec443a84fcf5d019642d SHA-256: 899a2138264d9150876907020e5c2cda2fa6afc3db0a1fc2913537a0b01f7d08
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 0.9648

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-free-exe-game-hack PDF link annotation
    • http://centr-expert.su/images/get-free-roblox_GM431946152.pdfIn PDF document text
    • http://centr-expert.su/images/pubg-uc-hack-app_GM1330123889.pdfIn PDF document text
    • http://centr-expert.su/images/free-coins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://centr-expert.su/images/roblox-robux_GM431946152.pdfIn PDF document text
    • http://centr-expert.su/images/coin-master-hack-game-download-mod-apk_GM406889139.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_off00002fbd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FBD 24748 bytes
SHA-256: 5a0a50ae90761476f7326278dfdd13c6f7ce6bbc954867317f9587e5df994c15
font_01_sfnt_off000067b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67B6 17780 bytes
SHA-256: 184f68a403119e274d74e0b6050f83bd20a8f42ea09f5a6442f850a022aaf90d

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