Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5a1d8f3802bc1ac…

MALICIOUS

PDF

41.8 KB Created: 2021-04-23 12:36:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ed8820845105037701b38f9066821736 SHA-1: 370ca86ca11632b7a43a97c900b6677d4c04c395 SHA-256: f5a1d8f3802bc1aca7be915f861c91fef5a1a3648824c3525a596181aa0df3bb
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 0.9941

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://netsecure.top/app/431946152/how-to-cheat-in-roblox-jailbreak-2021-game-hack PDF link annotation
    • https://www.legclub.org/uploads/files/files/roblox-free-vip-server-jailbreak.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/roblox-weight-lifting-simulator-2-strength-hack.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/dansploit-roblox-free.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/free-app-rewards-roblox.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/how-to-hack-roblox-to-get-robux-without-human-verification.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/fishing-simulator-roblox-hack-vehicle-mods.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/how-to-ban-people-from-servers-roblox-hack.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/cheats-glitches-for-roblox-2021.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/cheat-code-mining-simulator-roblox.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/new-hacker-on-roblox.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 1

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_003_off000043cc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x43CC 25624 bytes
SHA-256: 4203bee59a61e7f56c2559524cb60b3c45fbb131b9617a8520191d6313726f56
font_01_sfnt_off00007e6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E6B 19304 bytes
SHA-256: 90d0a7db81408a54341433efa4f411681412f9ffcae8df8dc662cb3af021fd07

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