Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f9d64426b40aaaa…

MALICIOUS

PDF

41.9 KB Created: 2021-05-13 08:02:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 9f60652226f0084fbe70783240a18c66 SHA-1: 40ab656c7643f6ac3a9f5753f06445675b828d22 SHA-256: 3f9d64426b40aaaa52d2b3f70caac2d7abe2dec7d87480f09b2778269fe8c8d9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains multiple links to known malicious redirector infrastructure, specifically disguised as "free generator / game hack" lures. The document body and extracted URLs strongly suggest a social engineering tactic to trick users into visiting potentially harmful sites. No scripts were extracted from this sample, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/daily-free-spins-coin-master-2021-game-hack In PDF document text
    • http://diatecgroup.com/images/coin-master-hack-apk-35-18_GM406889139.pdfIn PDF document text
    • http://diatecgroup.com/images/free-coin-master-account_GM406889139.pdfIn PDF document text
    • http://diatecgroup.com/images/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://diatecgroup.com/images/free-robux-link_GM431946152.pdfIn PDF document text
    • http://diatecgroup.com/images/free-spins-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://diatecgroup.com/images/free-spins-coin-master-twitter_GM406889139.pdfIn PDF document text
    • http://diatecgroup.com/images/free-games-like-minecraft_GM479516143.pdfIn PDF document text
    • http://diatecgroup.com/images/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://diatecgroup.com/images/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • http://diatecgroup.com/images/coin-master-free-spins--coins-2021_GM406889139.pdfIn PDF document text
    • http://diatecgroup.com/images/master-coin-hack-mod_GM406889139.pdfIn PDF document text
    • http://diatecgroup.com/images/how-to-exploit-roblox_GM431946152.pdfIn PDF document text
    • http://diatecgroup.com/images/coin-master-hack-mod-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://diatecgroup.com/images/minecraft-free-download_GM479516143.pdfIn PDF document text
    • http://diatecgroup.com/images/roblox-free-download_GM431946152.pdfIn PDF document text
    • http://diatecgroup.com/images/roblox-hacked-version-download_GM431946152.pdfIn PDF document text
    • http://diatecgroup.com/images/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://diatecgroup.com/images/free-coins-coin-master-link-today_GM406889139.pdfIn PDF document text
    • http://diatecgroup.com/images/coin-master-level-4_GM406889139.pdfIn PDF document text
    • http://diatecgroup.com/images/free-roblox-premium_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004747.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4747 24768 bytes
SHA-256: 4a33b14ecab1e619ddd560ceb1d209c9c46b75d030404cccae1b91201d7ed404
font_01_sfnt_off00008037.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8037 18708 bytes
SHA-256: 76af36f54327e394f6a0995f5c1804c6d580e71cb7eebf938ec25838add40309

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