Malicious PDF — malware analysis report

Static analysis result for SHA-256 5116fb556a601b49…

MALICIOUS

PDF

34.5 KB Created: 2021-07-04 03:10:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5bd3d809e0491d3cd19259708b43ef4c SHA-1: 80a279e6e878cfe545ac42c8b95f5e51801a4566 SHA-256: 5116fb556a601b49f1572ea85ba87132b96671b68ad1c7ddb50edf7bb93e8712
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.tw/app/406889139/coin-master-free-blogspot-game-hack PDF link annotation
    • http://foo.com.tw/files/100-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/roblox-hack-999999-robux-movil_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/coin-master-links-for-today_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/robux-earning-sites_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • http://foo.com.tw/files/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/how-to-hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/roblox-how-to-get-free-items-in-catalog-2021_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/free-robux-no-verification-required_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/coin-master-game-hack-version-download_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/coin-master-coin-link_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/roblox-shinobi-life-hack-2021_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/pet-simulator-roblox-hack_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/free-tiktok-followers-no-human-verification-or-survey_GM835599320.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_off0000312b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x312B 22620 bytes
SHA-256: 325e549ef703baa39a8d184761f1d24d3aa665fabeb56f8c3f9dc7efdca92423
font_01_sfnt_off000063a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A0 18464 bytes
SHA-256: 4ab065c9e1c1ce8cc0ca504291acf999189b22a872bad2ec3209c1b1ac2a7b96