Malicious PDF — malware analysis report

Static analysis result for SHA-256 910f74015d65d33e…

MALICIOUS

PDF

42.2 KB Created: 2021-05-16 12:38:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f0947453ea526e87419f916fb15ca27e SHA-1: 18d6e3390d61b9010f1e888691974df8a6650b68 SHA-256: 910f74015d65d33e5a282f4b3d3cd6d63d17a73c12acaa0f252bd16957c7e3e3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple links to known malicious redirectors, specifically promoting "game hacks" and "free coins" for popular games. The primary malicious URL identified is https://netcdn.xyz/app/406889139/coin-master-hack-xyz-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering tactic to drive users to potentially malicious websites, likely for credential harvesting or further malware delivery.

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-hack-xyz-game-hack In PDF document text
    • http://tc-kulmbach.de/images/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://tc-kulmbach.de/images/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • http://tc-kulmbach.de/images/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • http://tc-kulmbach.de/images/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://tc-kulmbach.de/images/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://tc-kulmbach.de/images/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://tc-kulmbach.de/images/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://tc-kulmbach.de/images/coin-master-hack-progamers_GM406889139.pdfIn PDF document text
    • http://tc-kulmbach.de/images/minecraft-windows-10-hack-client-2021_GM479516143.pdfIn PDF document text
    • http://tc-kulmbach.de/images/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • http://tc-kulmbach.de/images/coin-master-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • http://tc-kulmbach.de/images/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • http://tc-kulmbach.de/images/coin-master-free-spins-and-coins-for-today_GM406889139.pdfIn PDF document text
    • http://tc-kulmbach.de/images/free-gold-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://tc-kulmbach.de/images/coin-master-free-spins-instagram_GM406889139.pdfIn PDF document text
    • http://tc-kulmbach.de/images/coin-master-daily-free-spins-25_GM406889139.pdfIn PDF document text
    • http://tc-kulmbach.de/images/free-robux-just-click_GM431946152.pdfIn PDF document text
    • http://tc-kulmbach.de/images/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://tc-kulmbach.de/images/haktutsin-2021-09-coinmaster50freespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • http://tc-kulmbach.de/images/free-roblox-accounts-2021-with-robux_GM431946152.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_off000048ef.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48EF 25812 bytes
SHA-256: 136452a8fe0a431a1797ed4bf3496ac58c25a33aaa78ea9187ab50ebf75458d4
font_01_sfnt_off0000826f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x826F 18204 bytes
SHA-256: eb378c11d4c3edf43fd4a317fe896922564aeaa66921672c4d59ab66e1a3bbf9

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