Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8b3f2b18a610d40…

MALICIOUS

PDF

52.8 KB Created: 2021-05-16 18:11:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b565c6fe5145257d9aea0e4cc1c5dfda SHA-1: 061c38448c510d608f308244ab509b437b441b22 SHA-256: b8b3f2b18a610d40eabf23bbfa148f9488aaf024153e67e3bf22532d0af5d298
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a visual download button lure, suggesting a phishing or scam attempt. The ML classifier also flagged this PDF as malicious. The presence of JavaScript in the PDF stream indicates potential for malicious scripting, likely to redirect users to the listed URLs for fraudulent purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8788

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-free-spin-today-2021-game-hack In PDF document text
    • http://apostolosandreaslemesou.com/images/actual-free-robux_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/offers-to-complete-and-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/how-to-use-wurst_GM479516143.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/coin-master-daily-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/wurst-minecraft_GM479516143.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/free-roblox-adopt-me-accounts_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/earn-robux-com_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/do-coin-master-hacks-work_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/how-to-get-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/free-roblox-dominus_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/free-spins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c46.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C46 29788 bytes
SHA-256: 1e033ba82c7118058144487cfc778266e7c0d902cae39bf0967d7b560343ef5b
font_01_sfnt_off00008f2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F2E 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000098db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98DB 7332 bytes
SHA-256: d811e0aca85f3b94c42cd1240eec68b8eb378f3d8be5e408d3f6abd0f11f834d
font_03_sfnt_off0000aaf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAAF4 18644 bytes
SHA-256: 5d92db92da7874bc6d3fe3c9cb4f688e04248e846dc14a79e6405cdf6baca0cc

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