Malicious PDF — malware analysis report

Static analysis result for SHA-256 b586b61914dd6cde…

MALICIOUS

PDF

38.7 KB Created: 2021-05-25 08:31:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5fd3e42182e806f5678e25a0296a15ec SHA-1: 8ba026cda7fcd26bdbc9e6e192b3dea7da8281d3 SHA-256: b586b61914dd6cdeb93071d660e0145ba3fc3768240bc5637e808401988794bd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically promoting a 'game hack' or 'free generator' lure. The document body and heuristics indicate a clear intent to trick the user into clicking these links, likely leading to further malicious content or downloads. No scripts were extracted, but the embedded URLs are the primary indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9476

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/coin-master-free-spin-codes-game-hack In PDF document text
    • http://linens.kiev.ua/images/will-minecraft-dungeons-be-free_GM479516143.pdfIn PDF document text
    • http://linens.kiev.ua/images/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://linens.kiev.ua/images/hacks-master-coin_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_002_off000038ab.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x38AB 27276 bytes
SHA-256: 6ba94b954411bc75bf40c9f61cfcf9a25687491de28e810fb103bf7ac66024bd
font_01_sfnt_off000076f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76F7 18060 bytes
SHA-256: 6c6954b9f81c735a5c4580de4c42457a99792272849cec4d30b191d18cdb5601

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