Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d264a7b36dda43b…

MALICIOUS

PDF

41.1 KB Created: 2021-05-10 14:02:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 5a003fa38846a9f50aa88ecbc7752627 SHA-1: 837b745bad8b27a5e4bb5ec60209f1d1804ed71d SHA-256: 3d264a7b36dda43b21c49c773e4362033d7f2426c5baa510e19f3c1ae2adf517
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirector lure, pointing to a URL associated with malicious infrastructure. The document body explicitly contains the lure text 'Coin Master Hack Version 2021 Free Download' and a call to action 'CLICK HERE TO ACCESS COIN MASTER GENERATOR', further reinforcing the social engineering attempt. While no scripts were explicitly extracted, the PDF structure and the nature of the lure suggest an attempt to trick users into navigating to a malicious site, likely to download further malware.

Machine Learning

  • Nyx PDF Classifier clean score 0.0125

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-version-2021-free-download-game-hack In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000383e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x383E 25180 bytes
SHA-256: 661541d26ed497d472f254640eb66f2215b5e65ef011e679b2a9145e7ec18d31
font_01_sfnt_off000071f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71F6 3204 bytes
SHA-256: 8c2546387700f45186c395d475006178ee984eabbc175bcf1ee6eb58ba8b57aa
font_02_sfnt_off00007cf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CF9 18996 bytes
SHA-256: 92d9309ab276bc9aab9745226f7a970795db6d0c86763d97e38cf379742c13e0

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