Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7a598cfd6d0353a…

MALICIOUS

PDF

46.1 KB Created: 2021-05-11 13:25:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d195089b11349c11a0a93fbb789857a3 SHA-1: 8781a845a30f0818e414d1e990e557c6d24ed10b SHA-256: a7a598cfd6d0353ae8271c9883099b7f8e32106a523d962d7d6a5cd922fa66ef
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 0.9432

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/ww-roblox-come-game-hack PDF link annotation
    • http://tah-li.com/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://tah-li.com/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://tah-li.com/images/coin-master-free-spin-and-coins-links-home_GM406889139.pdfIn PDF document text
    • http://tah-li.com/images/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • http://tah-li.com/images/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://tah-li.com/images/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://tah-li.com/images/coin-master-free-spins-link-download-free_GM406889139.pdfIn PDF document text
    • http://tah-li.com/images/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://tah-li.com/images/free-robux-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://tah-li.com/images/coin-master-spin-ml_GM406889139.pdfIn PDF document text
    • http://tah-li.com/images/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://tah-li.com/images/how-to-get-minecraft-for-free-on-iphone-2021_GM479516143.pdfIn PDF document text
    • http://tah-li.com/images/new-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://tah-li.com/images/minecraft-windows-10-edition-free-with-java_GM479516143.pdfIn PDF document text
    • http://tah-li.com/images/inappropriate-roblox-games_GM431946152.pdfIn PDF document text
    • http://tah-li.com/images/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://tah-li.com/images/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://tah-li.com/images/can-i-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://tah-li.com/images/how-to-earn-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://tah-li.com/images/how-to-play-minecraft-for-free_GM479516143.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_003_off0000488e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x488E 27564 bytes
SHA-256: 1d2ca3e88c0470c9814964378f2cf2a5eba0a5f2a500abd3fa35731fb55d3d8c
font_01_sfnt_off00008786.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8786 2828 bytes
SHA-256: db1860fd79a3f2cbe32e2bada3ba4c68a2d581b7a24294387cd777233cc9cef6
font_02_sfnt_off0000913c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x913C 18404 bytes
SHA-256: 888324a908a3e314fa586c71b84bf0ea365017427310ce851cb3785b25609904

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