Malicious PDF — malware analysis report

Static analysis result for SHA-256 0376727950f32b25…

MALICIOUS

PDF

47.3 KB Created: 2021-05-13 12:12:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ceccdb1db6615347694b232dbacf404f SHA-1: 71099386bf73b6380abf56a884b9b1e11011fb74 SHA-256: 0376727950f32b257747f9c1f8355f0e8dda76b574212b2c8d602496f7ceb3fc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, masquerading as free game hacks or generators. The primary malicious URL identified is https://netcdn.xyz/app/479516143/minecraft-java-code-free-game-hack. The document body, though heavily obfuscated, contains references to this URL and other suspicious PDF links, suggesting a phishing or malware distribution attempt. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence indicate a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8619

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/479516143/minecraft-java-code-free-game-hack In PDF document text
    • http://michalmatys.pl/images/coin-master-free-coins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://michalmatys.pl/images/free-free-robux_GM431946152.pdfIn PDF document text
    • http://michalmatys.pl/images/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://michalmatys.pl/images/coin-master-spin-link-2021_GM406889139.pdfIn PDF document text
    • http://michalmatys.pl/images/free-coins-and-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://michalmatys.pl/images/picture-roblox_GM431946152.pdfIn PDF document text
    • http://michalmatys.pl/images/roblox-shirt-template-free_GM431946152.pdfIn PDF document text
    • http://michalmatys.pl/images/can-you-still-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://michalmatys.pl/images/coin-master-free-coins-spins_GM406889139.pdfIn PDF document text
    • http://michalmatys.pl/images/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • http://michalmatys.pl/images/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://michalmatys.pl/images/real-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://michalmatys.pl/images/coin-master-free-coins-link-2021-deutsch_GM406889139.pdfIn PDF document text
    • http://michalmatys.pl/images/minecraft-free-games-no-download_GM479516143.pdfIn PDF document text
    • http://michalmatys.pl/images/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • http://michalmatys.pl/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://michalmatys.pl/images/how-to-get-minecraft-for-free-on-ipad_GM479516143.pdfIn PDF document text
    • http://michalmatys.pl/images/coin-master-free-spins-hack-link_GM406889139.pdfIn PDF document text
    • http://michalmatys.pl/images/coin-master-free-spins-11-01-2021_GM406889139.pdfIn PDF document text
    • http://michalmatys.pl/images/robux-free-co_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048bd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48BD 25088 bytes
SHA-256: 96aa7f8d5bb2d5029b4003b769c743bf300cd8471e3dbc8317f6c60c1450f6d6
font_01_sfnt_off000081f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81F1 3020 bytes
SHA-256: f1a29adcea636583330be8db4f6466410de551ac48576b9e1aa5c34e2d665a1f
font_02_sfnt_off00008c46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C46 2816 bytes
SHA-256: 4555740682277f0055d57b15bd0ba953e5b51415ea3d21c93db391eace072d4f
font_03_sfnt_off00009657.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9657 18164 bytes
SHA-256: 9f11f6ffdaa6f71614cd3df9f38f5d5af32d3843530a13967cf59faad31feba0

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