Malicious PDF — malware analysis report

Static analysis result for SHA-256 d740c1e187c1da55…

MALICIOUS

PDF

39.6 KB Created: 2021-05-22 08:46:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c66db9332a379738006ff5afffe5f831 SHA-1: 7bf9e08c9d3f9fc5db9a0042845cc85e8be59fd6 SHA-256: d740c1e187c1da55c8c643a8bfc08e358aee3a3f43d2a38738bb4de400615d5d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generators' for games like Coin Master. The document body and heuristics indicate a lure to download a payload or access a scam website. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or scamming attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

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/free-spin-link-for-coin-master-game-hack In PDF document text
    • http://seniornetwanganui.org.nz/images/coin-master-free-spins-iphone_GM406889139.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/how-to-get-real-robux_GM431946152.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/free-spin-online-tool-coin-master_GM406889139.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/hack-my-game-xyz-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003429.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3429 25712 bytes
SHA-256: 113d0a1715f7050e18f3ce4f12685104e74b45d973fb7425b9066dfc58d43aea
font_01_sfnt_off00006e45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E45 3380 bytes
SHA-256: 1dd933c112880b232546f3aab6a17784a8f412d39fd551cc6eb31c5a04c3ce57
font_02_sfnt_off00007a2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A2D 18056 bytes
SHA-256: b406b504177f6b640bc1dbcd325e02770f8a0621b64b682f119f0b5c1d0e735d

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