Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb0fcef131613c21…

MALICIOUS

PDF

32.6 KB Created: 2021-07-19 23:53:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 9428d0325c501f22d22f0dfbd80c7fda SHA-1: 259c74fc8d8acfd455916703e2032a8e5c652363 SHA-256: bb0fcef131613c21dd570daeab1762c5b2240238024c7ca9ef5be1ea41874f39
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 0.9900

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.tw/app/431946152/how-to-hack-roblox-accounts-for-robux-game-hack PDF link annotation
    • https://www.similar.com.tw/upload/files/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/minecraft-java-edition-code-free_GM479516143.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/tiktok-free-fans_GM835599320.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/free-robux-offers_GM431946152.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/free-coin-master-links_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_off0000296f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x296F 22440 bytes
SHA-256: 3f1cdc704348362db5d48e072e85505673144e3fd2f0ae775304cab212cd12c5
font_01_sfnt_off00005b54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B54 18940 bytes
SHA-256: 3b0347d73c68fd0bbbcd576952b02f9767afda0ec465b8ecd6a41af37f6c412c

Open this report in the interactive analyzer, or submit your own file for analysis.