Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d8c8956d7a354d4…

MALICIOUS

PDF

44.3 KB Created: 2021-05-13 13:57:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a3f5ba0f6dc6b6937e66f019aaf4de96 SHA-1: dbfdec1cbcefc06e9d90b7120ad0676239ef1b78 SHA-256: 1d8c8956d7a354d431a5652fc2bd498fdfc276681e174e4376f1a0e7eb02c390
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to websites that are flagged as malicious redirectors, specifically promoting 'game hacks' and free currency generators. The document body and embedded URLs strongly suggest a social engineering lure to trick users into visiting these sites, which likely host further malicious content or phishing attempts. No scripts were extracted, but the PDF structure and embedded URLs are sufficient to infer a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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-daily-free-spin-and-coin-game-hack In PDF document text
    • https://uofk.edu/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://uofk.edu/images/working-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://uofk.edu/images/coin-master-mod-version-free-download-v344_GM406889139.pdfIn PDF document text
    • https://uofk.edu/images/coin-master-hack-generator_GM406889139.pdfIn PDF document text
    • https://uofk.edu/images/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://uofk.edu/images/free-robux-scams_GM431946152.pdfIn PDF document text
    • https://uofk.edu/images/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • https://uofk.edu/images/bit-ly-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://uofk.edu/images/robux-websites-2021_GM431946152.pdfIn PDF document text
    • https://uofk.edu/images/roblox-hack-game_GM431946152.pdfIn PDF document text
    • https://uofk.edu/images/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://uofk.edu/images/get-coin-master-spins-free_GM406889139.pdfIn PDF document text
    • https://uofk.edu/images/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://uofk.edu/images/free-roblox-premium_GM431946152.pdfIn PDF document text
    • https://uofk.edu/images/roblox-cp_GM431946152.pdfIn PDF document text
    • https://uofk.edu/images/haktuts-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://uofk.edu/images/free-minecraft-client_GM479516143.pdfIn PDF document text
    • https://uofk.edu/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://uofk.edu/images/oprewards-robux_GM431946152.pdfIn PDF document text
    • https://uofk.edu/images/coin-master-hack-mod-apk-unlimited-spins_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
font_00_sfnt_off00004a0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A0C 24132 bytes
SHA-256: 5c78f6e673de01c3b5106e1d1bfad6db1df373ab001b025349cc003c58382c1c
font_01_sfnt_off00007ff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FF8 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000089aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89AA 18480 bytes
SHA-256: 323fea871d3154f9ddf991b22fd859b77165b4ee4e2d03de0fe4666202988bbb

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