Malicious PDF — malware analysis report

Static analysis result for SHA-256 90b7617c63718899…

MALICIOUS

PDF

40.1 KB Created: 2021-05-20 23:19:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2d42550d786cce5ce6a098e4b2573352 SHA-1: 6efb3a18f2c1af87dc62915b587ef57c7ac6a4aa SHA-256: 90b7617c63718899ef008ef050c9ef19f37f9ecabac230f2fd655fd58b5bf652
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 0.7964

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-roblox-svg-game-hack PDF link annotation
    • http://make-up-stettler.ch/images/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://make-up-stettler.ch/images/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://make-up-stettler.ch/images/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://make-up-stettler.ch/images/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://make-up-stettler.ch/images/coin-master-free-spins-and-coins-haktuts_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_off000031a5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31A5 26056 bytes
SHA-256: 981b729c0c67c2363dbc9808210c6e1ce2e4912e1b68417df7eddc5baa87230c
font_01_sfnt_off00006e8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E8D 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off00007b34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B34 18348 bytes
SHA-256: ec5774183871ac2310e227d04ff410a8fddd606c61ae0fc98d7f5044e57efae1

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