Malicious PDF — malware analysis report

Static analysis result for SHA-256 e429878c1fd5da37…

MALICIOUS

PDF

33.0 KB Created: 2021-07-19 20:07:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 1733db66e2dc96ae3607ca43e7d95820 SHA-1: c9ef8ce0834958ed37b9ba2d62b6ccd9a2ec581f SHA-256: e429878c1fd5da372d739c5a52b4cbdcac6946a3c74d9dbd6f93cf42b23b9cf6
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-2021-easy-game-hack PDF link annotation
    • http://laboraltoledo.com/images/is-tiktok-free_GM835599320.pdfIn PDF document text
    • http://laboraltoledo.com/images/minecraft-free-apk_GM479516143.pdfIn PDF document text
    • http://laboraltoledo.com/images/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • http://laboraltoledo.com/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://laboraltoledo.com/images/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://laboraltoledo.com/images/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://laboraltoledo.com/images/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://laboraltoledo.com/images/free-tiktok-views-no-verification_GM835599320.pdfIn PDF document text
    • http://laboraltoledo.com/images/minecraft-font-free_GM479516143.pdfIn PDF document text
    • http://laboraltoledo.com/images/tiktok-free-views_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
stream_002_off00002a24.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A24 22128 bytes
SHA-256: 9b217cab45b10404dd3c76074df8817543924fe25b4ce1945e552598cc54dc87
font_01_sfnt_off00005b7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B7F 19360 bytes
SHA-256: f0ce80f5b9d5efe1c1018aaa801c8eca9f68d74c87ad0987669da43b4bcf3d99

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