Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2f3a6030c32968c…

MALICIOUS

PDF

42.1 KB Created: 2021-05-20 01:43:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 589135b20808d4421db2f54b3da3f913 SHA-1: 6eec819926247c99049d1cb3051f5e6e6be129eb SHA-256: a2f3a6030c32968c0cb5c4cc00b8b22a30f25aa149668f82c6d29f18b52cdd82
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, with one prominent URL leading to a known malicious redirector. This redirector is associated with 'game hack' lures, suggesting a social engineering tactic to trick users into visiting potentially harmful sites. The presence of numerous other URLs related to game cheats and virtual currency further supports this phishing-like lure. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/real-coin-master-hack-game-hack In PDF document text
    • http://www.gravel.ru/images/how-to-make-your-own-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • http://www.gravel.ru/images/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • http://www.gravel.ru/images/lots-of-robux_GM431946152.pdfIn PDF document text
    • http://www.gravel.ru/images/free-robux-site_GM431946152.pdfIn PDF document text
    • http://www.gravel.ru/images/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • http://www.gravel.ru/images/coin-master-daily-bonus_GM406889139.pdfIn PDF document text
    • http://www.gravel.ru/images/bux-gg-robux-free_GM431946152.pdfIn PDF document text
    • http://www.gravel.ru/images/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://www.gravel.ru/images/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.gravel.ru/images/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://www.gravel.ru/images/coin-master-coin-link_GM406889139.pdfIn PDF document text
    • http://www.gravel.ru/images/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.gravel.ru/images/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.gravel.ru/images/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://www.gravel.ru/images/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.gravel.ru/images/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • http://www.gravel.ru/images/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://www.gravel.ru/images/roblox-demon_GM431946152.pdfIn PDF document text
    • http://www.gravel.ru/images/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.gravel.ru/images/how-to-get-free-robux-without-verification-2021_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_off00004985.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4985 25940 bytes
SHA-256: 00e4a1250d0a0c123a5d355b951302e454f18bfb229fea52e8a10bf2a8f0b3fe
font_01_sfnt_off000083a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83A6 17788 bytes
SHA-256: c971b34c329d205054a16b1b5f827a74783bca0f841d374511d085dfea161b8f

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