Malicious PDF — malware analysis report

Static analysis result for SHA-256 1581ca2bc7a2d71b…

MALICIOUS

PDF

47.5 KB Created: 2021-05-11 01:36:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a6afbcf55103be158d6e39a70684c761 SHA-1: 916f07a76e06b299d73e4764c8939ea53052adb4 SHA-256: 1581ca2bc7a2d71bbbd6deefdb197b8f276d0964f4b1e034ad8bd6f66ca26fb6
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, many of which point to sites offering game hacks and cheats. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs suggests an attempt to redirect the user to a malicious download. Although no scripts were explicitly extracted, the document's structure and embedded links indicate a phishing or social engineering attempt to trick users into downloading malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

Heuristics 5

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/406889139/coin-master-free-gold-cards-game-hack.
  • 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-gold-cards-game-hack In PDF document text
    • http://zagorjeadventureteam.hr/files/free-robux-com_GM431946152.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/archery-master-3d-apk-and-mod-free-download-unlimited-coins_GM406889139.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/coin-master-free-spin-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/cheats-coin-master-free_GM406889139.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/weird-roblox_GM431946152.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/spin-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/daily-free-spins_GM406889139.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/coin-master-free-spin-sites_GM406889139.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/coin-master-invite-friends-free-spins_GM406889139.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/free-modded-minecraft-server_GM479516143.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/coin-master-60-spins_GM406889139.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/hack-a-game_GM431946152.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_off00004bf4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BF4 30180 bytes
SHA-256: d126d0630e2eddebd73633c1844be8434399ca0e6df541c689d721516df8841c
font_01_sfnt_off00008e80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E80 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off0000986a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x986A 17960 bytes
SHA-256: aba9a61c61b61fea048b73d77d5e297f3d5a3a83c57e433c8854d820da1f91b9

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