Malicious PDF — malware analysis report

Static analysis result for SHA-256 f54ce177cb9c085c…

MALICIOUS

PDF

37.3 KB Created: 2021-05-10 13:17:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4cfd180882c0b0d2ba5a02ccdd6182b2 SHA-1: d84a01ac283349eebe79b4ec14e93084f006b711 SHA-256: f54ce177cb9c085c8a4e7173b47ff69a32a30f2d8552b0202a28cfad6a913a91
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 0.9399

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-robux-microsoft-game-hack PDF link annotation
    • http://www.bripi.pl/images/http-bitly-coin-master-free-2021-spins_GM406889139.pdfIn PDF document text
    • http://www.bripi.pl/images/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://www.bripi.pl/images/coin-master-links-to-free-spins_GM406889139.pdfIn PDF document text
    • http://www.bripi.pl/images/coin-and-spin-link_GM406889139.pdfIn PDF document text
    • http://www.bripi.pl/images/coin-master-hack-mod_GM406889139.pdfIn PDF document text
    • http://www.bripi.pl/images/get-free-robux-info_GM431946152.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_off000036c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36C8 24604 bytes
SHA-256: 9b14c554dc219587cd050886a1ef6b5bc2444f55b90629a7678ed01225d4612e
font_01_sfnt_off00006f88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F88 18436 bytes
SHA-256: 753f3f2a839cbba740b1165c82973d17105d10f1d8ffbf22e8371d7b58d196dd

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