Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa584908b509f425…

MALICIOUS

PDF

40.4 KB Created: 2021-05-16 18:31:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 1e579aa2dec10ee0c70303c3ea39c751 SHA-1: 52a7a385829448b2a10f713b319879196ad0830b SHA-256: fa584908b509f4255ba8416615a8ffcfe1bc188f900fb3d530abde64b42be24f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically promoting 'game hacks' and 'free spins'. The document body and heuristics indicate a lure to a generator or hack site, which is a common social engineering tactic. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a malicious redirector chain designed to lead users to potentially harmful content or further exploits.

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-online-link-game-hack In PDF document text
    • https://www.metal.hr/files/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • https://www.metal.hr/files/today-free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.metal.hr/files/stock-speed-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.metal.hr/files/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • https://www.metal.hr/files/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.metal.hr/files/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdfIn PDF document text
    • https://www.metal.hr/files/roblox-robux_GM431946152.pdfIn PDF document text
    • https://www.metal.hr/files/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://www.metal.hr/files/how-do-you-get-roebucks-for-free_GM431946152.pdfIn PDF document text
    • https://www.metal.hr/files/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://www.metal.hr/files/coin-master-spin-link-today_GM406889139.pdfIn PDF document text
    • https://www.metal.hr/files/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.metal.hr/files/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • https://www.metal.hr/files/how-to-hack-coin-master-game-2021_GM406889139.pdfIn PDF document text
    • https://www.metal.hr/files/free-coins-coin-master-today_GM406889139.pdfIn PDF document text
    • https://www.metal.hr/files/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • https://www.metal.hr/files/free-roblox-wings_GM431946152.pdfIn PDF document text
    • https://www.metal.hr/files/coin-master-free-link-daily_GM406889139.pdfIn PDF document text
    • https://www.metal.hr/files/roblox-hacked-version_GM431946152.pdfIn PDF document text
    • https://www.metal.hr/files/minecraft-dungeons-free-download-pc_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000473a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x473A 23780 bytes
SHA-256: a6203ff81bf23445b317074d7ed19899c94daf3ea39c6940648816ecc850563c
font_01_sfnt_off00007cf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CF1 17788 bytes
SHA-256: fe6378a35aaddd1df9c91bfaa88201bdad89d62d9f4d299995ec0f595f057003

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