Malicious PDF — malware analysis report

Static analysis result for SHA-256 59c187553c8dfea4…

MALICIOUS

PDF

41.0 KB Created: 2021-05-13 11:01:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 34ac50fc51ceb6f8cca9b86c2149c293 SHA-1: 0f8f4755c7237240562a3c5ca713bd9eea4c00fa SHA-256: 59c187553c8dfea465d328a53ba307f944344b90a9a93d9e859c84a5f07cb4b9
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and generators. The heuristic firings indicate that these links are part of a known malicious redirector chain. While no scripts were explicitly extracted, the nature of the lures suggests a potential for further malicious activity, such as downloading additional payloads or phishing for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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-pe-game-hack In PDF document text
    • http://enosiderma.gr/images/coin-master-free-spins-a2z-help_GM406889139.pdfIn PDF document text
    • http://enosiderma.gr/images/but-link-says-free-robux_GM431946152.pdfIn PDF document text
    • http://enosiderma.gr/images/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://enosiderma.gr/images/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://enosiderma.gr/images/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://enosiderma.gr/images/free-links-to-coin-master_GM406889139.pdfIn PDF document text
    • http://enosiderma.gr/images/watch-videos-for-robux_GM431946152.pdfIn PDF document text
    • http://enosiderma.gr/images/coin-master-card-hack-apk_GM406889139.pdfIn PDF document text
    • http://enosiderma.gr/images/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • http://enosiderma.gr/images/roblox-re_GM431946152.pdfIn PDF document text
    • http://enosiderma.gr/images/roblox-hacks-for-mac_GM431946152.pdfIn PDF document text
    • http://enosiderma.gr/images/coin-master-hack-game_GM406889139.pdfIn PDF document text
    • http://enosiderma.gr/images/rbx-roblox-robux_GM431946152.pdfIn PDF document text
    • http://enosiderma.gr/images/coin-master-hack-spins-free_GM406889139.pdfIn PDF document text
    • http://enosiderma.gr/images/optifine-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://enosiderma.gr/images/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://enosiderma.gr/images/how-to-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://enosiderma.gr/images/info-roblox-com-robux_GM431946152.pdfIn PDF document text
    • http://enosiderma.gr/images/coin-master-spins-free-2021_GM406889139.pdfIn PDF document text
    • http://enosiderma.gr/images/roblox-free-robux-com_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_off000046ec.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46EC 25224 bytes
SHA-256: bcbc14ce72f3ab8f0ab83ef8e38c56b58c0034405b262dbb55239c4fec785efd
font_01_sfnt_off00007f80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F80 17724 bytes
SHA-256: f2c518e24e430f5639c0522049ec6170810629e79e139cf24a514a2af733470f

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