Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6863398551c3472…

MALICIOUS

PDF

42.2 KB Created: 2021-05-15 17:24:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7a3cde721d0a6227055c0ed2bf5a389a SHA-1: bd24f3e50d9e42bc3634fd05f6ff50414fe9fe58 SHA-256: d6863398551c3472167c208a1f8f717991549bbf46cc1da69ade7e56451fb2e4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links designed to lure users into clicking on them, ostensibly for free game items. One primary link, 'https://netcdn.xyz/app/406889139/free-spins-on-coin-master-game-hack', is identified as a malicious redirector. The document body and heuristics indicate a social engineering tactic to drive traffic to potentially malicious websites.

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/free-spins-on-coin-master-game-hack In PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/roblox-free-clothes-girl_GM431946152.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/robux-fun-hack_GM431946152.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/coin-master-free-spins-and-coins-app_GM406889139.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/www-free-robux-com_GM431946152.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/coin-master-unlimited-spin-hack-apk_GM406889139.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/how-can-i-get-free-coinsn-coin-master_GM406889139.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/master-coin-hack-app_GM406889139.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/how-do-you-get-roebucks-for-free_GM431946152.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/roblox-login-hack_GM431946152.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/coin-master-cheat-codes_GM406889139.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/minecraft-free-download-laptop_GM479516143.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/coin-master-34-4-hack-download_GM406889139.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/free-spins-for-coin-master-game_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_off00004aef.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AEF 24884 bytes
SHA-256: fd9fab20040d475ebc4332df1f08c5ea17acde6dd431213ae0f4c1d5d4ad0a8f
font_01_sfnt_off000083aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83AA 17884 bytes
SHA-256: addbd5428a422ca7211e94293fed3a4f98c85d5f6337328d4d3623e90d90c649