Malicious PDF — malware analysis report

Static analysis result for SHA-256 516351f26ae8ca45…

MALICIOUS

PDF

43.2 KB Created: 2021-05-16 17:00:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 40d1d6b2b855d157655be83670be8f6c SHA-1: 5400e0c1984070ee1b28efde1ba51299d33451cd SHA-256: 516351f26ae8ca45c44331d12b94466e6b56395cfc5bfc5a61fb411463e11006
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising "free generator / game hack" lures. The primary redirector URL is https://netcdn.xyz/app/406889139/coin-master-claim-free-spins-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it's designed to exploit user interest in free in-game items to lead them to malicious sites, likely for further exploitation or credential harvesting.

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/406889139/coin-master-claim-free-spins-game-hack In PDF document text
    • http://dennemaat.nl/images/minecraft-pe-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • http://dennemaat.nl/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://dennemaat.nl/images/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://dennemaat.nl/images/woman-roblox_GM431946152.pdfIn PDF document text
    • http://dennemaat.nl/images/coin-master-heaven-links_GM406889139.pdfIn PDF document text
    • http://dennemaat.nl/images/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://dennemaat.nl/images/free-spins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://dennemaat.nl/images/202100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://dennemaat.nl/images/how-to-make-a-server-in-minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://dennemaat.nl/images/free-spins_GM406889139.pdfIn PDF document text
    • http://dennemaat.nl/images/robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://dennemaat.nl/images/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://dennemaat.nl/images/coin-master-hack-version-download-2021_GM406889139.pdfIn PDF document text
    • http://dennemaat.nl/images/roblox-robux-generator_GM431946152.pdfIn PDF document text
    • http://dennemaat.nl/images/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://dennemaat.nl/images/hack-coin-master-free_GM406889139.pdfIn PDF document text
    • http://dennemaat.nl/images/free-robux-group_GM431946152.pdfIn PDF document text
    • http://dennemaat.nl/images/coin-master-hack-mod_GM406889139.pdfIn PDF document text
    • http://dennemaat.nl/images/minecraft-hacks-18-9_GM479516143.pdfIn PDF document text
    • http://dennemaat.nl/images/what-do-roblox-points-do_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
stream_003_off0000496f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x496F 26560 bytes
SHA-256: f9924881eac1f78dda0847ce2264e039c3836de8c7e216bf96a7cef02df91d8f
font_01_sfnt_off000086cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86CD 18220 bytes
SHA-256: 4508a7247666ecd7f475af3e2510e2d7297b60fda6d209b486c2dc6be28a63e8

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