Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3dcb459d15b62a6…

MALICIOUS

PDF

37.6 KB Created: 2021-05-20 21:52:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 6953980ab8c70ca4b25f043581c1ad52 SHA-1: e1515e3856ce62a084e290fce0d3d54a1bd9bb6f SHA-256: e3dcb459d15b62a6da9f6084399c667876b1568deb7a036ee85777d145925bba
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links, including a prominent one to 'netcdn.xyz' disguised as a game hack. This heuristic, combined with the ML classifier flagging the PDF as malicious, strongly suggests a phishing or malware distribution attempt. The document body also contains a call to action, 'CLICK HERE TO ACCESS ROBLOX GENERATOR', further reinforcing the lure. The embedded URLs likely lead to malicious content or further stages of infection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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/431946152/hacking-apps-for-roblox-game-hack PDF link annotation
    • http://www.repion.com/uploaded_files/userfiles/files/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/free-whatsapp-tik-tok-status-download_GM835599320.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/free-back-accessories-roblox_GM431946152.pdfIn PDF document text
    • http://www.repion.com/uploaded_files/userfiles/files/will-minecraft-dungeons-be-free_GM479516143.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_off00003457.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3457 25572 bytes
SHA-256: 58a7fc3cded1f8642adf6daec2363cae0cc471b1b7ccf11349dbe0ce455fd880
font_01_sfnt_off00006fb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB0 18932 bytes
SHA-256: a12a900017875743d46ad83be25c63e25fa00e3014bd6d438c4b8f248ab77b0b

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