Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a593a4eabd86ea3…

MALICIOUS

PDF

45.8 KB Created: 2021-06-03 09:27:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fc3703d0ab192b0aadcf313f924b0dbf SHA-1: 33e5b63d55aa200a83139eb4921fb58d695bc169 SHA-256: 6a593a4eabd86ea3c7f77d1be17e77535094435a57ae25e731e4457ce4810bc9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as game hack generators. The primary malicious link identified is https://netcdn.online/app/406889139/regal-world-coin-master-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering attack aimed at driving users to malicious websites, likely for further malware delivery or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9797

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.online/app/406889139/regal-world-coin-master-game-hack In PDF document text
    • http://library.smpn2-byl.sch.id//repository/coin-master-facebook-free-spins_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/how-to-get-free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/watch-ads-for-robux_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/minecraft-hack-ios_GM479516143.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-draw-roblox_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/coinmaster-blogspot_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/coin-master-hack-org_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-roblox-codes_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/coin-master-website_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/easiest-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/wwwcoin-master-free-spincom_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_004_off00004e6e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E6E 24596 bytes
SHA-256: c31aee0ae198ed93a33efbbefd1af0b0dea9883c1f0b32a46c0a0c6e3a4c66aa
font_01_sfnt_off00008614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8614 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off00008fc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FC7 18280 bytes
SHA-256: 870151cc34d251c26f9607d3912ad3b2adf44136eb12da199d6464cd7fc312d3

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