Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7b2adab20d6134e…

MALICIOUS

PDF

43.2 KB Created: 2021-05-14 19:24:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d8c24dfec95fa018e12e9a895245da47 SHA-1: 7c9106e69f1075084d989ae38c0b58052774b26c SHA-256: a7b2adab20d6134e734b175b7fe904c4d025a9ff7a57b7f674d39f9f0cadff65
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains multiple heuristics indicating malicious redirector links, specifically targeting users with lures for game hacks and free currency. The primary malicious URL identified is https://netcdn.xyz/app/406889139/twitter-coin-master-free-spins-link-game-hack, which is likely used to deliver a second-stage payload. The document body, though heavily obfuscated, contains references to this URL and game-related terms, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/twitter-coin-master-free-spins-link-game-hack In PDF document text
    • https://www.gvandenakker.nl/images/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • https://www.gvandenakker.nl/images/coin-master-free-bonus_GM406889139.pdfIn PDF document text
    • https://www.gvandenakker.nl/images/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.gvandenakker.nl/images/coin-master-hack-to-get-free-spins_GM406889139.pdfIn PDF document text
    • https://www.gvandenakker.nl/images/irobux-com-redeem_GM431946152.pdfIn PDF document text
    • https://www.gvandenakker.nl/images/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • https://www.gvandenakker.nl/images/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • https://www.gvandenakker.nl/images/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://www.gvandenakker.nl/images/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.gvandenakker.nl/images/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • https://www.gvandenakker.nl/images/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • https://www.gvandenakker.nl/images/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • https://www.gvandenakker.nl/images/coin-master-free-spins-link-2021-iphone_GM406889139.pdfIn PDF document text
    • https://www.gvandenakker.nl/images/collect-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.gvandenakker.nl/images/coin-master-spin-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://www.gvandenakker.nl/images/how-to-gift-robux-on-mobile_GM431946152.pdfIn PDF document text
    • https://www.gvandenakker.nl/images/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://www.gvandenakker.nl/images/www-robux_GM431946152.pdfIn PDF document text
    • https://www.gvandenakker.nl/images/free-roebucks-com_GM431946152.pdfIn PDF document text
    • https://www.gvandenakker.nl/images/coin-master-gift-hack_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_off00004921.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4921 30004 bytes
SHA-256: 307d4f4d4d27a0e3eb08cd7b25892633409162a923bbe602b92a32bc56fa2a9d
font_01_sfnt_off000086d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86D4 18220 bytes
SHA-256: 52ffbd88cc2cac306fe82121e7a954d434fc7a4bd2ad0f2292b5f4c74619d21b

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