Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ebaee29f895dee1…

MALICIOUS

PDF

47.4 KB Created: 2021-05-23 10:24:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 634195550c50bda2ae0ba98827c1fc94 SHA-1: 43e298e3272f7f040f1532b36122ab26830dd646 SHA-256: 8ebaee29f895dee1cf2aae5073b55a63688edbd3543cd65cb101fb6106a95b96
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 0.7358

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/free-robux-scams-game-hack PDF link annotation
    • https://lamgiangservice.com/ckfinder/userfiles/files/free-minecraft-resource-packs_GM479516143.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/coin-master-hacks-for-free-spins_GM406889139.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/games-that-give-free-robux_GM431946152.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_off000035ee.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35EE 33516 bytes
SHA-256: 816147f3a4c838d4931eeadcb49156cac64fd2802935f74887b68e4460ac7ec4
font_01_sfnt_off00007f85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F85 7420 bytes
SHA-256: 0b188308ab0e7ffce9913d63d697a586f2937cafc51a771db38e3a566cd37e24
font_02_sfnt_off000097f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97F4 18500 bytes
SHA-256: f6eebadb3de4af7ab0205057cc55fc1daf9397692da1370c2a19d2d749ad11f1

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