Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4f33c28aad18f3d…

MALICIOUS

PDF

34.0 KB Created: 2021-07-09 05:47:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 1ddded6c8a79729c131f4e8b1f386bc8 SHA-1: 07c84a642dfc78e1fdc38fe0c263b7e3a5d968b1 SHA-256: a4f33c28aad18f3de464a1487d5a24e049132577eb8ed827783dad0139751c69
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/835599320/get-viral-on-tiktok-free-game-hack PDF link annotation
    • http://nationshield.ae/userfiles/files/roblox-jailbreak-free-lamborghini_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/code-roblox-tokyo-ghoul-2021-free-rc_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/how-to-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/free-minecraft-maps_GM479516143.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/hack-on-roblox-free-money-vircle-simulator_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/best-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/free-roblox-followers-generator-2021_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/hack-coin-master-game-download_GM406889139.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/free-robux-group_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/all-free-stuff-in-roblox-catalog_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/rbx-robux_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/inappropriate-roblox-games-2021_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/tiktok-free-fans-and-likes_GM835599320.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/how-to-get-free-tiktok-fans_GM835599320.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/how-to-hack-anyones-account-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 5

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
font_00_sfnt_off0000329e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x329E 21792 bytes
SHA-256: c31c04e096398901672b90097f207eb26f3179fa128dc727e0c968bbc4161251
font_01_sfnt_off00006275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6275 18180 bytes
SHA-256: 7db76bfe9e60a028fa179c18097b23c02b50aad710d6ae2643872d5a8cd5aa26

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