Malicious PDF — malware analysis report

Static analysis result for SHA-256 91613888839c0162…

MALICIOUS

PDF

44.1 KB Created: 2021-05-15 15:53:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 4bec1abd8bfb5130c0b14678fe10dc38 SHA-1: 6a2ed832e0bbe22525bad9ca737b63c4945c85b0 SHA-256: 91613888839c016221af25f80b9cf22b468733c83bd91851f8c7587afb88aa3b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as offers for game hacks and currency. The primary malicious URL identified is https://netcdn.xyz/app/431946152/roblox-skin-free-game-hack. The document body and embedded URLs suggest a lure for popular online games, aiming to trick users into visiting malicious sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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/roblox-skin-free-game-hack In PDF document text
    • http://jdleducation.com/images/free-mods-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://jdleducation.com/images/coin-master-free-spin-link-list_GM406889139.pdfIn PDF document text
    • http://jdleducation.com/images/robux-only_GM431946152.pdfIn PDF document text
    • http://jdleducation.com/images/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://jdleducation.com/images/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://jdleducation.com/images/minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://jdleducation.com/images/robux-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://jdleducation.com/images/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://jdleducation.com/images/free-minecraft-bedrock-server_GM479516143.pdfIn PDF document text
    • http://jdleducation.com/images/free-spins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://jdleducation.com/images/free-coins-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://jdleducation.com/images/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
    • http://jdleducation.com/images/coin-master-fan_GM406889139.pdfIn PDF document text
    • http://jdleducation.com/images/minecraft-svg-free_GM479516143.pdfIn PDF document text
    • http://jdleducation.com/images/minecraft-116-apk-download_GM479516143.pdfIn PDF document text
    • http://jdleducation.com/images/robux-download_GM431946152.pdfIn PDF document text
    • http://jdleducation.com/images/coin-master-hack-spins-ios_GM406889139.pdfIn PDF document text
    • http://jdleducation.com/images/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://jdleducation.com/images/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://jdleducation.com/images/how-to-hack-coin-master-2021_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_003_off00004afb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AFB 26976 bytes
SHA-256: 59b0aed0831f68bf01446f16f127f0b2af62f3e2ba0276e9fc03fc49d90ba157
font_01_sfnt_off00008a68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A68 18236 bytes
SHA-256: 6f613c146b2caf8aa71dfdba399286dfcc190b8555f8633d10d72eb14be7938a

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