Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa2928cdcbe04abc…

MALICIOUS

PDF

42.0 KB Created: 2021-05-17 09:46:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 50835ac3bc948fae276d19453e6662da SHA-1: 789fa4910e2b63b6f037f62f7cf85a83d3ed8c2c SHA-256: aa2928cdcbe04abc1e8a0b4079ec7dccc3fb3ca918a2b93225cb4f767bcb4257
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'blox.pink-free-robux-game-hack'. The document body, though heavily obfuscated, contains references to 'free Robux' and a call-to-action phrase, aligning with a common lure for phishing or malware distribution. The embedded URLs further support the malicious intent by linking to pages offering game hacks and cheats, likely serving as a distribution point for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 3

  • 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/blox.pink-free-robux-game-hack In PDF document text
    • http://umksn.pl/images/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://umksn.pl/images/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • http://umksn.pl/images/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://umksn.pl/images/robux-free-com_GM431946152.pdfIn PDF document text
    • http://umksn.pl/images/coin-master-hack-apk-free-download_GM406889139.pdfIn PDF document text
    • http://umksn.pl/images/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • http://umksn.pl/images/free-coins-for-planet-master-game_GM406889139.pdfIn PDF document text
    • http://umksn.pl/images/easy-robux-today_GM431946152.pdfIn PDF document text
    • http://umksn.pl/images/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://umksn.pl/images/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://umksn.pl/images/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://umksn.pl/images/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • http://umksn.pl/images/coin-master-hack-2021-ios-download_GM406889139.pdfIn PDF document text
    • http://umksn.pl/images/roblox-com-free_GM431946152.pdfIn PDF document text
    • http://umksn.pl/images/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • http://umksn.pl/images/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • http://umksn.pl/images/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://umksn.pl/images/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://umksn.pl/images/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://umksn.pl/images/coin-master-spins-hack-2021_GM406889139.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_off000046fc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46FC 25192 bytes
SHA-256: 5aed6b7e070d5908a20605077c0a29f44ee4cc482f53a5a66d2261b2c87652a8
font_01_sfnt_off000080f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80F5 18620 bytes
SHA-256: 20ad8a2126bb9f489cd4862944fdd8c1c01869fd803457c3ce1390bedb89f69f

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