Malicious PDF — malware analysis report

Static analysis result for SHA-256 d42b858e2e8614ce…

MALICIOUS

PDF

42.3 KB Created: 2021-05-14 03:40:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: bf73a3a0fe4a0206f03c8296c2484ff2 SHA-1: d7052a46204cbf60b46872cc0fd58f7f35f9aecb SHA-256: d42b858e2e8614cec9dd1c286ef1343af369642c4b1e8a58a07e5e836d7bd78a
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links pointing to a known malicious redirector infrastructure, specifically advertising a 'Coin Master Event Hack'. The document body text and heuristic firings confirm the intent is to lure users to click these links, likely to download further malware or engage in phishing. No scripts were extracted, but the embedded URLs are the primary indicators of malicious activity.

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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00003658.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3658 29424 bytes
SHA-256: 0bb0eaa9651a435a6c0cbf09fd9be121b228141df5a1b32a0c92e9bb388c0833
font_01_sfnt_off000078ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78AE 3560 bytes
SHA-256: c953d730e49f69c7d62e02a926729ae4a31de13d9a976dc4a95b39cf47066c93
font_02_sfnt_off00008533.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8533 17828 bytes
SHA-256: 3aa3979f7db9db60f85c12743f17b039c262b8ea7d603c2f9581d8dcabd3843c

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