Malicious PDF — malware analysis report

Static analysis result for SHA-256 d70a19ec51eca82c…

MALICIOUS

PDF

44.1 KB Created: 2021-05-16 06:05:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b5716f5066e0b510424969e2b606e5e7 SHA-1: 32514da3ac439bdd318b79521dd29c9967f2a95b SHA-256: d70a19ec51eca82cd85ead43e7652ea5da79e2f680611892d6ecf16288b9cc44
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure, presenting itself as a 'Coin Master Hack' to trick users into clicking a malicious link. The link redirects to infrastructure known for distributing malware. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to lead the user to a malicious download or exploit. The ML classifier also flagged this document with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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-co-game-hack In PDF document text
    • http://legs11.co.za/images/coin-master-gift-link-hack_GM406889139.pdfIn PDF document text
    • http://legs11.co.za/images/is-minecraft-vr-free_GM479516143.pdfIn PDF document text
    • http://legs11.co.za/images/coin-master-hack-ios-cydia_GM406889139.pdfIn PDF document text
    • http://legs11.co.za/images/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://legs11.co.za/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://legs11.co.za/images/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://legs11.co.za/images/robux-redeem_GM431946152.pdfIn PDF document text
    • http://legs11.co.za/images/coin-master-hack-tool-no-survey_GM406889139.pdfIn PDF document text
    • http://legs11.co.za/images/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://legs11.co.za/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://legs11.co.za/images/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • http://legs11.co.za/images/coin-master-hack-2021-ios-download_GM406889139.pdfIn PDF document text
    • http://legs11.co.za/images/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://legs11.co.za/images/roblox-bloxburg-hack_GM431946152.pdfIn PDF document text
    • http://legs11.co.za/images/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://legs11.co.za/images/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://legs11.co.za/images/coin-master-hack-ios-without-verification_GM406889139.pdfIn PDF document text
    • http://legs11.co.za/images/free-spins-coin-master-october-17-2021_GM406889139.pdfIn PDF document text
    • http://legs11.co.za/images/coin-master-hack-unlimited-spins-apk-download_GM406889139.pdfIn PDF document text
    • http://legs11.co.za/images/coin-master-email-rewards_GM406889139.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_off00004951.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4951 25340 bytes
SHA-256: 5495d37daeb63064a218d831ea5716dc69898c9f7c894caa63e2f472663e2c18
font_01_sfnt_off000081cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81CF 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008b81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B81 17716 bytes
SHA-256: c15a8689411d8cca9ab0759ab4c496fe9b4353d676dd738e300719e9588112ed

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