Malicious PDF — malware analysis report

Static analysis result for SHA-256 037088b886c08337…

MALICIOUS

PDF

45.1 KB Created: 2021-05-11 04:00:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7dc85025a6791036d3982b177d89029a SHA-1: 7939c08d1f874e9ef3551810aeb182cda53b9ba0 SHA-256: 037088b886c08337c1c9e824dab8e3efe8c39b340584618c0a8f6bf7e0c5eda2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links that point to known malicious redirector infrastructure, specifically advertising 'free generators' for games like Coin Master and Roblox. The ML classifier also flagged this PDF as malicious. The primary attack vector appears to be luring users to click these links, which likely leads to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9621

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/coinmaster-links-game-hack In PDF document text
    • https://www.cayosalinas.com/images/free-robux-co_GM431946152.pdfIn PDF document text
    • https://www.cayosalinas.com/images/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://www.cayosalinas.com/images/roblox-robux-generator_GM431946152.pdfIn PDF document text
    • https://www.cayosalinas.com/images/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • https://www.cayosalinas.com/images/robux-generator-no-verification-needed_GM431946152.pdfIn PDF document text
    • https://www.cayosalinas.com/images/robux-generator_GM431946152.pdfIn PDF document text
    • https://www.cayosalinas.com/images/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • https://www.cayosalinas.com/images/robux-free-com_GM431946152.pdfIn PDF document text
    • https://www.cayosalinas.com/images/free-spin-coin-master-apk_GM406889139.pdfIn PDF document text
    • https://www.cayosalinas.com/images/can-you-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.cayosalinas.com/images/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://www.cayosalinas.com/images/roblox-free-login_GM431946152.pdfIn PDF document text
    • https://www.cayosalinas.com/images/coin-master-hack-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.cayosalinas.com/images/coin-master-free-coins-and-spins-hack_GM406889139.pdfIn PDF document text
    • https://www.cayosalinas.com/images/coin-master-free-spins-android_GM406889139.pdfIn PDF document text
    • https://www.cayosalinas.com/images/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.cayosalinas.com/images/free-redeem-code-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.cayosalinas.com/images/no-verification-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.cayosalinas.com/images/coin-master-free-spins-link-cheat_GM406889139.pdfIn PDF document text
    • https://www.cayosalinas.com/images/how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004823.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4823 25652 bytes
SHA-256: 365eb635a346b39e8ea8080ffffda961a4b88752df936a07e183b077ead27937
font_01_sfnt_off00008210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8210 3560 bytes
SHA-256: c953d730e49f69c7d62e02a926729ae4a31de13d9a976dc4a95b39cf47066c93
font_02_sfnt_off00008e96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E96 17976 bytes
SHA-256: a321bb876bfba90ca025b4c3027fd158f72fae1f747322c9d5199a500aa286eb

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