Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcb41c2ac527deba…

MALICIOUS

PDF

42.3 KB Created: 2021-05-14 06:31:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ac3a660e9b87586f1cd399814e3039a1 SHA-1: f588c92e11135288b64e9109132a966c84436ca2 SHA-256: bcb41c2ac527debae1d6de2d1ad70f0a381f401ede12116cb900869154dc23aa
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The ML classifier strongly indicates maliciousness, supported by numerous embedded URLs pointing to game cheat sites. The document body contains a call-to-action phrase and links, suggesting a social engineering lure to download a payload. No scripts were extracted from this sample.

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/free-coins-coin-master-no-human-verification-game-hack In PDF document text
    • https://liceucastrodelapenya.com/images/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • https://liceucastrodelapenya.com/images/robux-for-kids_GM431946152.pdfIn PDF document text
    • https://liceucastrodelapenya.com/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://liceucastrodelapenya.com/images/minecraft-pe_GM479516143.pdfIn PDF document text
    • https://liceucastrodelapenya.com/images/free-coin-master-spins-link-facebook_GM406889139.pdfIn PDF document text
    • https://liceucastrodelapenya.com/images/coin-master-free-spins-2021-blogspot_GM406889139.pdfIn PDF document text
    • https://liceucastrodelapenya.com/images/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://liceucastrodelapenya.com/images/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • https://liceucastrodelapenya.com/images/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://liceucastrodelapenya.com/images/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://liceucastrodelapenya.com/images/dailyrobux_GM431946152.pdfIn PDF document text
    • https://liceucastrodelapenya.com/images/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
    • https://liceucastrodelapenya.com/images/free-robux-app_GM431946152.pdfIn PDF document text
    • https://liceucastrodelapenya.com/images/coin-master-heaven-links_GM406889139.pdfIn PDF document text
    • https://liceucastrodelapenya.com/images/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • https://liceucastrodelapenya.com/images/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://liceucastrodelapenya.com/images/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://liceucastrodelapenya.com/images/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • https://liceucastrodelapenya.com/images/mcpe-master-unlimited-coins-free-download_GM406889139.pdfIn PDF document text
    • https://liceucastrodelapenya.com/images/free-links-coin-master_GM406889139.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_off00004bc7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BC7 24848 bytes
SHA-256: 82ca6772ec34a56e656de54abceea898b0de21cf8976e4bc9b40b640424cfc16
font_01_sfnt_off00008311.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8311 18244 bytes
SHA-256: 01d63b1d73aa8bf8d24c0c61ee418a5c78711e36496b8284aaee89190376465e

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