Malicious PDF — malware analysis report

Static analysis result for SHA-256 8056c9fa0cf33a68…

MALICIOUS

PDF

40.3 KB Created: 2021-05-24 04:40:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b500e4c9af40ac80019c1f44ffb3f265 SHA-1: b0b4d1de3ea4eaf7352cb76ca428e9fe830e11ff SHA-256: 8056c9fa0cf33a681e6203c5ec7aff3b6f460ecca2d366ff22268d4ae3caf59c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector infrastructure, specifically advertising 'Coin Master Free Spins and Coins Daily' and 'game hacks'. The primary URL, https://netcdn.xyz/app/406889139/coin-master-free-spins-and-coins-daily-game-hack, is flagged as a malicious redirector. The document body also contains similar lures and links, reinforcing the social engineering aspect of this attack. Although no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7776

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-spins-and-coins-daily-game-hack In PDF document text
    • http://radoszyna.pl/images/free-robux-come_GM431946152.pdfIn PDF document text
    • http://radoszyna.pl/images/coin-master-hack-that-actually-works_GM406889139.pdfIn PDF document text
    • http://radoszyna.pl/images/free-robux-images_GM431946152.pdfIn PDF document text
    • http://radoszyna.pl/images/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://radoszyna.pl/images/coin-master-free-daily-spins-and-coins_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
stream_002_off00003526.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3526 26320 bytes
SHA-256: 07a4af40deddc184512bbc04c5b9c47028420a76881d7f11cdb5c82a25ca0afd
font_01_sfnt_off00007034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7034 3400 bytes
SHA-256: 4b3e0f36ad1e0c7e3ea5c178fd2b4f097d1e01575fc6a4101a8b520db34dfe07
font_02_sfnt_off00007b5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B5E 18480 bytes
SHA-256: e9052e0f9c593188345ba389179451ef12c6c6a401d56a628cce0964dfd3917c

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