Malicious PDF — malware analysis report

Static analysis result for SHA-256 1984f489d15a584c…

MALICIOUS

PDF

34.3 KB Created: 2021-06-21 19:59:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: cfd170642199db348dfbfaf58bf81f93 SHA-1: c77aafc8ba97cd26f95142fc853f16b8316e1877 SHA-256: 1984f489d15a584cf4627e4a708ca392d6f76777a1ae622f829f7b87d07bb330
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 0.9980

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 http://netcdn.co/app/431946152/free-games-in-roblox-game-hack PDF link annotation
    • http://bressanassessoria.com.br/images/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/utiliser-manette-free-roblox_GM431946152.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/how-o-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/how-to-hack-your-roblox-robux_GM431946152.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/free-roblox-accounts-nbc_GM431946152.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/how-to-change-your-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/get-tiktok-followers-free_GM835599320.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/how-to-hack-into-getting-robux_GM431946152.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/hacks-for-roblox-high-school-2_GM431946152.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/free-roblox-executor_GM431946152.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/free-robux-safe_GM431946152.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/roblox-best-looking-free-avatar_GM431946152.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/coin-master-100-spin_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_off00002fc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FC8 22368 bytes
SHA-256: 0303a486de2fdec7cab0a27b6e4e8ce8d89d5250a365d0bc95ab7506e97dd9eb
font_01_sfnt_off00006177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6177 18908 bytes
SHA-256: cacdebc29c5c9632f548d130da5b790a5fb471e99c7aafb3cf67a729212703e9

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