Malicious PDF — malware analysis report

Static analysis result for SHA-256 8be7395f66273a59…

MALICIOUS

PDF

39.2 KB Created: 2021-05-21 02:44:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 98aecd13526163f2d29f73eea14cc1c2 SHA-1: ebe348e97e3916c180105dc0081ad8a48a619262 SHA-256: 8be7395f66273a59e7ebe8ec59ff5a07d2ed375ee16e4e58f4256cf11b7d7b4a
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 0.8060

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-do-you-get-free-robux-game-hack PDF link annotation
    • http://cornerwebstudio.com/images/is-there-an-actual-hack-that-work-for-coin-master_GM406889139.pdfIn PDF document text
    • http://cornerwebstudio.com/images/free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://cornerwebstudio.com/images/free-coins--spins-coin-master_GM406889139.pdfIn PDF document text
    • http://cornerwebstudio.com/images/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/pokemon-go-free-hack-apk_GM1094591345.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_off000031fa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31FA 26088 bytes
SHA-256: f470ca74613f273480b9dc9a1e90433e59ac9f90055bc35a83370bb038df4348
font_01_sfnt_off00006c5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C5E 2816 bytes
SHA-256: 4555740682277f0055d57b15bd0ba953e5b51415ea3d21c93db391eace072d4f
font_02_sfnt_off0000766e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x766E 18612 bytes
SHA-256: 37b0398febc23a1417b5642eaebf6c5e0b941c8fdaeae9a9e3ba89062b3e12f9

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