Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c1077a0ce39b278…

MALICIOUS

PDF

36.4 KB Created: 2021-05-16 04:02:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: bd742526a67ca6a12a0560cd11e7023d SHA-1: bbaefab14b5620ee968a8888b8718b95712546b4 SHA-256: 3c1077a0ce39b278f6bd2b1d8b909fa0a46e7acb082394902a4b9e4cdfc4c447
130 Risk Score

Malware Insights

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

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically promoting a "Coin Master Hack 2021". The document body text and heuristic firings indicate a lure to download or access a generator, which is a common tactic for distributing malware. The presence of embedded URLs and the nature of the lure suggest an attempt to trick users into executing a malicious payload.

Machine Learning

  • Nyx PDF Classifier clean score 0.0312

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-2021-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000034bc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34BC 25296 bytes
SHA-256: e7bc8159099adbd8b4ca254b25095750ba3f7d90dbe6f5f997e2e89a10b315a5
font_01_sfnt_off00006d5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D5D 18116 bytes
SHA-256: 17974cef81917e5ef69542194afa433aff210173cc902887fbc2b56a9328dd03

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