Malicious PDF — malware analysis report

Static analysis result for SHA-256 540660cf3ca4752f…

MALICIOUS

PDF

44.3 KB Created: 2021-06-03 08:28:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 993246a553902b1c1106be8e2654e691 SHA-1: aaf6a45ba22b995aeba36dc9be4d8bfa3ef005b9 SHA-256: 540660cf3ca4752f96744c296418b633927b8a9cce7c01d1f3008fa8a5f17698
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to a 'game hack' lure. The embedded URL, https://netcdn.online/app/431946152/give-me-robux-now-game-hack, is identified as malicious infrastructure. The document body, though heavily obfuscated, contains references to this URL and appears to be a lure for free Robux or game hacks, aligning with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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.online/app/431946152/give-me-robux-now-game-hack In PDF document text
    • https://www.legclub.org/uploads/files/files/minecraft-free-demo_GM479516143.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/minecraft-launcher-download-free_GM479516143.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/free-spin-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/coin-master-free-spin-links-december-30-2021_GM406889139.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/coin-master-hack-apk-ios_GM406889139.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/coin-master-hack-iosgods_GM406889139.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/roblox-adopt-me-free-pets_GM431946152.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/vip-roblox-free_GM431946152.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/free-robux-discord_GM431946152.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/how-to-get-free-skins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/hack-version-coin-master-apk_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_004_off00005194.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5194 24596 bytes
SHA-256: e73c8e445fbb787c7f54e12eff8082c55b97c2834a4e0350743445417da31ab6
font_01_sfnt_off000089fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89FD 18444 bytes
SHA-256: da387504e4ee90144f6399ec13e2f6eb5be90933d390e8f78ca10c807e4b036a

Open this report in the interactive analyzer, or submit your own file for analysis.