Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd15b1ac75a54b8b…

MALICIOUS

PDF

42.5 KB Created: 2021-05-16 02:55:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1a7e4dda6ca01eaf246703434b02c007 SHA-1: 275aae7f01f47ca2ef6cdb9002f39afa4e3e5db4 SHA-256: dd15b1ac75a54b8b3f0b362251f5b85acd80405a152f39b3e70c7a71437a7fe6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector domains and known malicious infrastructure, masquerading as a "Coin Master Free Download For Pc" lure. The primary malicious link, https://netcdn.xyz/app/406889139/coin-master-free-download-for-pc-game-hack, is associated with a game hack generator, indicating a phishing or scam attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a malicious redirector workflow, likely intended to lead users to a phishing site or download unwanted software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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-download-for-pc-game-hack In PDF document text
    • http://algierimasonry.com/images/offers-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/free-magical-chest-coin-master_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/minecraft-coins-free_GM479516143.pdfIn PDF document text
    • http://algierimasonry.com/images/roblox-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://algierimasonry.com/images/coin-master-free-spins-and-chips_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/robux-in_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/coin-master-hack-app-ios-download_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/coin-master-free-coins-today_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/coin-master-link-daily-get-free-spins-amp_GM406889139.pdfIn 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_off00004b4d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B4D 24492 bytes
SHA-256: 7237be8354637c6bffc50c7023ef1993cf11e71e663a8210f4ddc5c861b330a7
font_01_sfnt_off00008358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8358 18444 bytes
SHA-256: b0499442804c302970887a2d9cba6ef3f31768e477807758de6572ac3a0df5c2

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