Malicious PDF — malware analysis report

Static analysis result for SHA-256 e31b135c9aee3cfc…

MALICIOUS

PDF

43.4 KB Created: 2021-05-16 04:22:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 2e39e63bc84cbbf14e285ce8eea7f26b SHA-1: 4cdedd066056abe5c2b38ca296ba11d72325cb3b SHA-256: e31b135c9aee3cfc5ad490a33dfa2eea31290a1d2a53b04aa2b1a6f4a1f56994
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free Robux'. The heuristic firings indicate that these links are part of a known malicious redirector chain. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to trick the user into visiting a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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.xyz/app/431946152/earn-robux-today-game-hack In PDF document text
    • http://jandimotors.co.uk/images/free-coin-master-gold-cards_GM406889139.pdfIn PDF document text
    • http://jandimotors.co.uk/images/free-robux-wheel_GM431946152.pdfIn PDF document text
    • http://jandimotors.co.uk/images/roblox-svg-free_GM431946152.pdfIn PDF document text
    • http://jandimotors.co.uk/images/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://jandimotors.co.uk/images/coin-master-free-spins-8-14-2021_GM406889139.pdfIn PDF document text
    • http://jandimotors.co.uk/images/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://jandimotors.co.uk/images/minecraft-wurst-hacked-client_GM479516143.pdfIn PDF document text
    • http://jandimotors.co.uk/images/coinmaster-hack_GM406889139.pdfIn PDF document text
    • http://jandimotors.co.uk/images/how-to-create-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://jandimotors.co.uk/images/coin-master-game-hacking_GM406889139.pdfIn PDF document text
    • http://jandimotors.co.uk/images/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://jandimotors.co.uk/images/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://jandimotors.co.uk/images/free-coins-coin-master-today_GM406889139.pdfIn PDF document text
    • http://jandimotors.co.uk/images/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • http://jandimotors.co.uk/images/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://jandimotors.co.uk/images/coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • http://jandimotors.co.uk/images/hackear-juego-coin-master_GM406889139.pdfIn PDF document text
    • http://jandimotors.co.uk/images/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://jandimotors.co.uk/images/cheats-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://jandimotors.co.uk/images/how-to-get-free-pets-in-adopt-me-roblox_GM431946152.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
font_00_sfnt_off00004771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4771 27912 bytes
SHA-256: 17f42ea8b1c6d233c2b28dec1bd448010d1a7a74d6326e8ee374991718f393dc
font_01_sfnt_off000086dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86DD 18432 bytes
SHA-256: 50fc1adeb895ae30588f73a493889120d8bf728fc3821c38df9289c33b75de2a

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