Malicious PDF — malware analysis report

Static analysis result for SHA-256 36853aebddf6bed1…

MALICIOUS

PDF

39.1 KB Created: 2021-05-11 08:01:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6b138806d87c1b774ef40ffc3e8e7c22 SHA-1: 4e10a00c913330c31729350cb764da63a4856070 SHA-256: 36853aebddf6bed1cb99360df75195f4400fcb113c92c11bcac92a04720898f5
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, specifically promoting a 'Coin Master Hack Online Android'. The heuristic firings indicate the document is designed as a lure for game hacks, leveraging known malicious redirectors. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or scam attempt to drive traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier clean score 0.0127

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-hack-online-android-game-hack In PDF document text
    • https://coinmasterspinandcoin.comIn 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_003_off0000329a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x329A 25080 bytes
SHA-256: 6074c6b40cd1707f4d3e60b44be46af2f2a92dec0d9c1ddedf18f6a1d75e7bb5
font_01_sfnt_off00006aa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA7 4020 bytes
SHA-256: dbaa9c12d07f3632734605f1d5d6dee3ad5af1f57488e46d95dab68b383f08c5
font_02_sfnt_off0000782f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x782F 17964 bytes
SHA-256: e085c742a6298e55fcde9a217167edad0f2b0c01ff8e5715ed5b8bb288dc9136

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