Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8afc1656d79da84…

MALICIOUS

PDF

34.8 KB Created: 2021-06-28 03:07:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 50eaac661f462493abbc1960bb8096f1 SHA-1: 63d69db48993fc14c660bad37190ce2685c982bf SHA-256: a8afc1656d79da8499546421159bfd3c267bcae1d384d645b6bf995c52a9111c
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/best-ways-to-make-robux-in-roblox-for-free-game-hack PDF link annotation
    • https://www.donjastubica.hr/files/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/coin-master-code-for-free-spins_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/minecraft-free-android_GM479516143.pdfIn PDF document text
    • http://www.donjastubica.hr/files/hack-coin-master-online-without-human-verification_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/easy-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/haktuts-coin-master-today_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/is-minecraft-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • https://www.donjastubica.hr/files/free-daily-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/what-is-my-robux-promo-code-for-free_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/free-robux-gift-cards-live_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/earn-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/minecraft-survival-free_GM479516143.pdfIn PDF document text
    • https://www.donjastubica.hr/files/how-to-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/proxo-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/pokemon-go-free-download-version_GM1094591345.pdfIn PDF document text
    • http://www.donjastubica.hr/files/coin-master-attack-hack_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/roblox-hack-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/can-you-get-minecraft-for-free-on-pc_GM479516143.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_off00002e49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E49 22724 bytes
SHA-256: 624d65b4b5f337b33f56222eaa01e5babedb256444e609b20cf4e4583f21c8ff
font_01_sfnt_off00006118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6118 19640 bytes
SHA-256: 9e639cbd88305b526600de66e65d7ba218bbe62fae315ea6ba6cf3796d1fbb6e

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