Malicious PDF — malware analysis report

Static analysis result for SHA-256 45586d5086d92156…

MALICIOUS

PDF

45.5 KB Created: 2021-05-16 01:59:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 92d454e26022b2d30c39ff14d5853ba4 SHA-1: 8e700bef66dbc0cb0f58f83b9e383d0e2ca3b189 SHA-256: 45586d5086d92156b2b6211d4d7a85b3960a4e2808267dd0b2d579e86c2f2d96
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a "Coin Master Hack 2021" and includes a link to a known malicious redirector infrastructure. The document body and embedded links suggest the primary goal is to redirect users to potentially malicious websites, likely for further exploitation or credential harvesting. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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-hack-2021-without-verification-game-hack In PDF document text
    • http://brinicombe.co.uk/images/coin-master-free-spins-moonactive_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/coinmaster_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/coin-master-el-tiger-card-free_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/coin-master-free-spins-link-whatsapp-group_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/i-need-robux_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/roblox-password-hacker_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/add-robux_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/coin-master-firebird-card-free_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/oginject-co_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/roblox-inappropriate_GM431946152.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_003_off00004a9c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A9C 24620 bytes
SHA-256: 5e8add1ad5e9077d5ec22818fbf227f36d9999fe59185df359b84d844f6976c8
font_01_sfnt_off000082ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82AD 3124 bytes
SHA-256: 9967c6221325a4ff3f7c4336922605f990450164c2eee2df708cc81823c6ec98
font_02_sfnt_off00008d8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D8C 18756 bytes
SHA-256: 8aa4e312459bb9d5d616f22e45372e364c039c39adebed3f09684cd63dbfffd3

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