Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4b2649fde82cd6e…

MALICIOUS

PDF

32.9 KB Created: 2021-07-20 00:01:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 61c330fdd559bc87ad1db199ebc0e098 SHA-1: 187aaec22286f7888371eb84e028c17b41101ca4 SHA-256: a4b2649fde82cd6ea6bd6b53540d8809725fcbee955c1e7be61c306694f89c02
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/roblox-password-hacker-game-hack PDF link annotation
    • http://www.sapaengineering.kz/images/minecraft-free-no-download_GM479516143.pdfIn PDF document text
    • http://www.sapaengineering.kz/images/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://www.sapaengineering.kz/images/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sapaengineering.kz/images/get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sapaengineering.kz/images/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.sapaengineering.kz/images/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.sapaengineering.kz/images/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • http://www.sapaengineering.kz/images/free-tiktok-fans-no-verification_GM835599320.pdfIn PDF document text
    • http://www.sapaengineering.kz/images/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://www.sapaengineering.kz/images/free-minecraft-servers-to-join_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_off0000299f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x299F 22764 bytes
SHA-256: 556f82a3403e6846f652d1a41e722a83e96e6e00899cc106f969c2a6c79df49f
font_01_sfnt_off00005cbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CBE 18860 bytes
SHA-256: 4a649625507d387f19787b195785a71baad3d56deacdbc8c563703119e3c92b4

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