Malicious PDF — malware analysis report

Static analysis result for SHA-256 efefdb8b566e0aae…

MALICIOUS

PDF

36.6 KB Created: 2021-05-12 21:33:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7af09a35c4a22918040aab22ab074af4 SHA-1: 68a04e06c8e3998a7ffd74d697dbd6ad83545bdb SHA-256: efefdb8b566e0aaea4d2363e40e9328aa95e466d9131ad1599a92c175ca7f658
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to a malicious URL, masquerading as a game hack generator. The document body explicitly mentions 'Coin Master Hack Online Generator' and includes a 'CLICK HERE TO ACCESS COIN MASTER GENERATOR' call to action, indicating a phishing or scam attempt. The presence of embedded URLs and the lure suggest a malicious document designed to trick users into visiting a compromised site, likely to download further malware or engage in credential harvesting.

Machine Learning

  • Nyx PDF Classifier clean score 0.0292

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-generator-without-human-verification-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_off0000351e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x351E 25100 bytes
SHA-256: a0237bbebec2f572a6249509ff5b952a9104c45416c782e601df12fec2754ccf
font_01_sfnt_off00006c83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C83 18688 bytes
SHA-256: cd935613fc622552088d026563d3601a20192ff4529e6ad67866ad1470b7d2d3

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