Malicious PDF — malware analysis report

Static analysis result for SHA-256 c44c3b9a6a7c26ef…

MALICIOUS

PDF

38.2 KB Created: 2021-05-22 22:40:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 65cca943197c9a1069202545eeef7adc SHA-1: 1ca77105043ef951bf6345fc8643b0df8b495e26 SHA-256: c44c3b9a6a7c26ef780f10329b07a14270eb8f2b593a2d65a2abe028419458ab
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links and a call-to-action phrase designed to trick users into clicking on a URL that leads to a 'free generator' for Coin Master. This lure is associated with known malicious redirector infrastructure, indicating a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7010

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-free-spin-today-game-hack In PDF document text
    • http://www.manchieu.vn/upload/editor/files/free-coin-master-spins-blogger_GM406889139.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/free-spins-coin-master-no-verification_GM406889139.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/coin-master-game-free-spin-download_GM406889139.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/get-free-spins-coin-master_GM406889139.pdfIn 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
font_00_sfnt_off0000326a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x326A 25176 bytes
SHA-256: 4b60a23050eafbf8528d57550855c719e01f5ad7a81c0e5aff90b802d9cd84e4
font_01_sfnt_off00006a09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A09 2868 bytes
SHA-256: d2d857e2ddc1082c7667b23f2135a5c0ba26a2ff8b42c86c89c8e0b09aece855
font_02_sfnt_off000073f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73F3 18240 bytes
SHA-256: a96ac7afd25cadbabafd1b9dbf0a180d0c1833ed2d07acb4363f122556c39d20

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