Malicious PDF — malware analysis report

Static analysis result for SHA-256 41c10178b213bb92…

MALICIOUS

PDF

37.7 KB Created: 2021-05-23 11:47:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3ae32f59f7d74e93ba4472643381f0ca SHA-1: 49904c95ebb8acab5cd357dcc9fcc02f2d089560 SHA-256: 41c10178b213bb928dfe60f2a78e448a4e1d9581cb17a58b8b8e4b667db9b659
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/431946152/roblox-hack-game-hack PDF link annotation
    • https://elite-house.su/images/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://elite-house.su/images/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://elite-house.su/images/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://elite-house.su/images/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • https://elite-house.su/images/master-coin-free-link_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
font_00_sfnt_off00003318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3318 29420 bytes
SHA-256: 7d7f7518c8762c2b254bf2e7c48d9a215f6521a3139e0ce286cc9da257fd6b35
font_01_sfnt_off00007276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7276 18184 bytes
SHA-256: 1e306c7abfe58da704748ef58ff750010dbbd803bf497203b0bed85dd8d0d5c5

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