Malicious PDF — malware analysis report

Static analysis result for SHA-256 50877c3d30cc3e98…

MALICIOUS

PDF

41.7 KB Created: 2021-05-16 06:42:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 04155e942cd9b5f04ef66a5faaf14887 SHA-1: 4de4050a1613aa52f6033fc820c7c25eff4eea3b SHA-256: 50877c3d30cc3e9895677e94d7db592cc7e35a75e5c34577e7fbf0d6e6793c70
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that are identified as malicious redirectors, specifically leading to game hack generators. The document body, though partially corrupted, contains references to 'Spin Coin' and a URL that aligns with the heuristic findings. The presence of numerous embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

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/spin-coin-game-hack In PDF document text
    • https://itv-grabungen.de/images/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-free-spins-cheat-deutsch_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/free-spins-promo-code-for-coin-master_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-spins_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/roblox-robux-generator-http-freerobuxgenerator-xyz_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/rbx-robux_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/hack-crack-for-coin-master-currency_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-hacks-for-spins_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/play-games-for-robux_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/abd-roblox_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/free-robux-download_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/get-robux-now_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-hack-game_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/toolbox-for-minecraft-pe-ios_GM479516143.pdfIn PDF document text
    • https://itv-grabungen.de/images/minecraft-world-free-download_GM479516143.pdfIn PDF document text
    • https://itv-grabungen.de/images/how-to-robux_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_off00004a5c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A5C 25344 bytes
SHA-256: f2d6b99ec0c8e1c2a63e5cae6a5a5842095f5f13f683d378523af8477070a465
font_01_sfnt_off0000836e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x836E 17392 bytes
SHA-256: b56bff47aa771abc34fd6f7ab31864e8be47b484c749d0c581bff3c59f183b7a

Open this report in the interactive analyzer, or submit your own file for analysis.