Malicious PDF — malware analysis report

Static analysis result for SHA-256 50e402c91fc7049a…

MALICIOUS

PDF

37.5 KB Created: 2021-07-06 22:40:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: d4120ddb7b7091ecce30317f420aef3e SHA-1: a6c692cc86ef636188e1cb3e2989a518810c1c14 SHA-256: 50e402c91fc7049a9f8e384d35e7cd475b21516919f6f13e01173ceba51da9fc
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically advertising 'free Robux' and game hacks. The document body, though partially corrupted, contains references to these lures and embedded URLs. The presence of a visual download button and instructions for password-protected archives suggests a multi-stage lure designed to bypass security controls and deliver a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 http://netcdn.tw/app/431946152/free-robux-images-game-hack In PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/rbx-place-free-robux_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/get-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/free-minecraft-account-and-password-generator_GM479516143.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/can-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/coin-master-download-hack_GM406889139.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/roblox-hack-download-ios_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/free-robux-group_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/urbx-club-free-robux_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/coin-master-daily-free-spins-link-download_GM406889139.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/coin-master-hack-blog_GM406889139.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/free-magical-chest-coin-master_GM406889139.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/how-to-become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/roblox-robux-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/free-robux-com_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/roblox-xbox-1-cheats_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/roblox-speed-hack-feb-4_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off00003b0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3B0E 22816 bytes
SHA-256: b97afd55d1cbc6fd432246319eaebbe73a404812474b2d2347fff9f9d45703f3
font_01_sfnt_off00006dfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DFD 18976 bytes
SHA-256: f6715e88b90fcea68fd90ecb14bc0b4d412decc30ec826ef46449e8ff66567a5

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