Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcb66ab713971ef6…

MALICIOUS

PDF

37.2 KB Created: 2021-05-24 09:17:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c26497c7c7be4a84d2ef26af6c1f018e SHA-1: 5557c62456f6f47d3875b801c415c517baf6d122 SHA-256: bcb66ab713971ef6129e1bbce66bc28eef05efa57221ee9f015dd4f2818c6da2
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-noob-vs-pro-vs-hacker-vs-god-game-hack PDF link annotation
    • http://montchanintt.fr/images/what-games-give-you-robux_GM431946152.pdfIn PDF document text
    • http://montchanintt.fr/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://montchanintt.fr/images/how-to-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://montchanintt.fr/images/coin-master-hack-twitter_GM406889139.pdfIn PDF document text
    • http://montchanintt.fr/images/coin-master-mod-apk_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_off000034a3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34A3 25828 bytes
SHA-256: b501ebedc2f50a932efd70778a8837c83d984d3fa2ad41b643936bfd02567625
font_01_sfnt_off00006f95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F95 18500 bytes
SHA-256: 35163f059b41a7a3602679841a335cd83055ee85c0a72342166b4475486ea273

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