Malicious PDF — malware analysis report

Static analysis result for SHA-256 491d6e4c205930a5…

MALICIOUS

PDF

36.7 KB Created: 2021-05-23 01:24:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 56f7d691166f238deb37375967bc048f SHA-1: 073256255600cd5a990905f3d1a165d17c01ccd0 SHA-256: 491d6e4c205930a56d1c631cd43c6371d7fa511eb579e37164f0a1837d7b0537
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 0.9616

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 https://netcdn.xyz/app/479516143/how-to-start-a-minecraft-server-for-free-game-hack PDF link annotation
    • https://uimedan.ac.id/assets/ckfinder/userfiles/files/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • https://uimedan.ac.id/assets/ckfinder/userfiles/files/spin-link-coin-master_GM406889139.pdfIn PDF document text
    • https://uimedan.ac.id/assets/ckfinder/userfiles/files/coin-master-free-link_GM406889139.pdfIn PDF document text
    • https://uimedan.ac.id/assets/ckfinder/userfiles/files/free-minecraft-mods-for-pc_GM479516143.pdfIn PDF document text
    • https://uimedan.ac.id/assets/ckfinder/userfiles/files/hack-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000359d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x359D 25200 bytes
SHA-256: 2c253854532834c48e17fcbeaaf5641fd572780c59dd349170389d8bf326f6ae
font_01_sfnt_off00006f1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F1A 17988 bytes
SHA-256: 4f50b9796c9c5e6e2841d90a47ce680cd3d0047611852497406c2f0c8cfa935a

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