Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d8f5de44652934c…

MALICIOUS

PDF

36.8 KB Created: 2021-05-21 12:01:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: fc8101cebf5eb506da928fa86a93cb3e SHA-1: 1afcb496e2a2206c3468ddfb03636996700a47ff SHA-256: 1d8f5de44652934ca5fc63c7042dc9920d5368c36f37aa2f27946fb11e4a9f73
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 0.9447

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-java-free-account-game-hack PDF link annotation
    • https://www.dunnagebags4u.com/uploaded_files/userfiles/files/earn-free-robux_GM431946152.pdfIn PDF document text
    • https://www.dunnagebags4u.com/uploaded_files/userfiles/files/coin-master-cards-free-cards_GM406889139.pdfIn PDF document text
    • https://www.dunnagebags4u.com/uploaded_files/userfiles/files/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.dunnagebags4u.com/uploaded_files/userfiles/files/doctor-louie-roblox_GM431946152.pdfIn PDF document text
    • https://www.dunnagebags4u.com/uploaded_files/userfiles/files/free-spins-on-coin-master-2021_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_off000035d4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35D4 25380 bytes
SHA-256: db0be6baa56340a53e09a4cdf63eca49ffe56a39d4f575b70b5265d51f936eca
font_01_sfnt_off00006f34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F34 18128 bytes
SHA-256: 787ae5aa2fe8ee3e05b40f55ac2adb21d77115e18bda7782f632936ac93a1380

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