Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc97eea825868cb8…

MALICIOUS

PDF

29.8 KB Created: 2021-07-18 23:17:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: cf691b860565a9b7e085d2e3066bdd02 SHA-1: 4869443944f7f91d2363517a2483bcf737e18ef7 SHA-256: dc97eea825868cb86c2fb70f942be2d158ffa9848da1b5cee31ad25f1801e23b
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 0.8523

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 http://netcdn.tw/app/431946152/earn-free-robux-game-hack PDF link annotation
    • https://inspiration-modellbau.de/images/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/minecraft-java-free-download_GM479516143.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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
font_00_sfnt_off000022d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22D8 21728 bytes
SHA-256: dbf88e253a4d289df099f73e6f0455dfcf966f0a8191b4b949ff575bf711650e
font_01_sfnt_off0000528f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x528F 18428 bytes
SHA-256: ce8be1eae563149e41a2b7e5f13780d458aa554a2c2a18751dc5d40709868ea0

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