Malicious PDF — malware analysis report

Static analysis result for SHA-256 865bd27f426fac4e…

MALICIOUS

PDF

37.4 KB Created: 2021-05-21 17:37:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0989488750a8c16bd466b8b689ebebcf SHA-1: 74bffe53503501b97ba4405973636d34d4ae7882 SHA-256: 865bd27f426fac4eae64cd7b1d0b5b5fbbe778984bffc63b374af52799a7d4fb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to free game items, specifically mentioning 'Roblox Toy Codes' and 'game hack'. It contains multiple embedded URLs that point to known malicious redirector infrastructure, designed to lead users to further malicious content or scams. The document body and heuristics indicate a clear intent to trick users into clicking links that are part of a malicious redirection chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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/431946152/free-roblox-toy-codes-2021-game-hack In PDF document text
    • http://balkanin.com/images/daily-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://balkanin.com/images/instagram-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://balkanin.com/images/free-online-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://balkanin.com/images/free-robux-today_GM431946152.pdfIn PDF document text
    • http://balkanin.com/images/collect-free-spins-for-coin-master_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_off00003221.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3221 26472 bytes
SHA-256: 29fe6d7309f71cf2502deff3ff07e732dc2117d27a2a358fd20e36ba7a212fe6
font_01_sfnt_off00006f88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F88 18704 bytes
SHA-256: 310b0eb167ed5acb3e0393954d8d7f46b13cc3d4732db83d1204f458420b6348

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