Malicious PDF — malware analysis report

Static analysis result for SHA-256 83dab8f233e763ee…

MALICIOUS

PDF

45.9 KB Created: 2021-06-09 05:27:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: aac235db12ba13c1418b8f75ad5df954 SHA-1: 16b64d4962974cb8e52b077e7dcfc77e4c4b0bda SHA-256: 83dab8f233e763ee3c1359671997eb187632f1a056a90ed8a7b8808d90040855
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 0.9864

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.tw/app/431946152/hack-mui-dragon-ball-n-roblox-game-hack PDF link annotation
    • http://bressanassessoria.com.br/images/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/free-robux-only-username_GM431946152.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/free-robux-script_GM431946152.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/pokemon-go-free-zoom_GM1094591345.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/free-robux-site_GM431946152.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/free-coins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/coin-master-hack-apk-android-1_GM406889139.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/optifine-pe_GM479516143.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/how-to-get-free-robux-real-life_GM431946152.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/coin-master-free-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/was-minecraft-ever-free_GM479516143.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://bressanassessoria.com.br/images/coinmaster-gps-user-review-coinmaster-coin-master-hack-pagedemo-index_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005064.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5064 26476 bytes
SHA-256: 03400bbc3a0a47a3aab26a1b91f9b7db3039403864b266906e27c1b4125c870d
font_01_sfnt_off00008e6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E6E 19092 bytes
SHA-256: 76cdfb942b2ec7bb8afc5a70a900d598f9f9ae1eb94c54790ac24644a1ede2a7

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