Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f12a799c5db239a…

MALICIOUS

PDF

45.6 KB Created: 2021-05-10 17:20:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 79c0d3c440270568c663374836ec5e55 SHA-1: c14e3c28ba7b1645ac9185ceda4b1968438234dc SHA-256: 0f12a799c5db239a3cd0fef03a98b4551c16b59516da45ab028085f648406509
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a critical heuristic firing for a malicious redirector link, specifically targeting users with a 'free generator / game hack' lure. The embedded URL, https://netcdn.xyz/app/406889139/hack-coin-master-game-apk-game-hack, is associated with this malicious infrastructure. The document body and PDF facts confirm the presence of this lure, suggesting an attempt to trick users into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0135

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/hack-coin-master-game-apk-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00003561.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3561 25500 bytes
SHA-256: 026b0b671fe7f7e4bfab438b98805f768038b74b9bbe428166e2ecb9cb838d29
font_01_sfnt_off00006e94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E94 4028 bytes
SHA-256: a17c2a746d49ac23b23e38a371e32fddecfcd91b10cf42ff6155bff6b8a07e91
font_02_sfnt_off00007c35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C35 2788 bytes
SHA-256: 6fd7c7f447d66842f81aa8cf197935b17f22157d0c7e9f95622df1b5b4ddf530
font_03_sfnt_off00008625.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8625 18152 bytes
SHA-256: 31b27374ffcb065f7237e3afe8d60b30aadfbb844f2d6e99af30877ce40d7303
font_04_sfnt_off0000a7b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7B8 3264 bytes
SHA-256: e32c06502c11b52acb5e814091c5fdbffd1e2a904ac7a9cfb8b5b180bd139088

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