Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bf3c764580f20db…

MALICIOUS

PDF

46.6 KB Created: 2021-05-24 23:02:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7f2aea39a60784a84538e86d3c855e86 SHA-1: 4d444d633e2259b93dec3b97df63dbec2ebb7944 SHA-256: 2bf3c764580f20dbc9073d221f5c34b609ea43af1721ed042dc53470e74f2837
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically a lure for 'free Robux' or 'game hacks'. The document body and heuristics indicate a clear intent to trick the user into clicking these links, likely to download a second-stage payload. No scripts were extracted, but the embedded links are the primary indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7714

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/get-free-robux-no-human-verification-game-hack In PDF document text
    • http://deyuan-pc.com.tw/images/is-minecraft-free-on-pc_GM479516143.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/free-minecraft-capes_GM479516143.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/how-to-get-tiktok-famous-free_GM835599320.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/freespinandcoin-blogspot-coin-master_GM406889139.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/how-to-get-minecraft-for-free-on-mobile_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003430.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3430 28784 bytes
SHA-256: cfb737d7a34e8f49395fbb8a24c717f5b97fa9b36542f95e50800e65844df4ff
font_01_sfnt_off00007669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7669 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off0000830c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x830C 6636 bytes
SHA-256: 62075f0fe13502d46afb6e55e83d440c29ef4988399537df1f86e7653ce3b744
font_03_sfnt_off00009318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9318 18860 bytes
SHA-256: 77094cb8e4b41d81131149df95963a95cd1356d500cc75fcdf894a2f9afc6be7

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