Malicious PDF — malware analysis report

Static analysis result for SHA-256 26e7c808f09bb26b…

MALICIOUS

PDF

42.6 KB Created: 2021-05-12 12:05:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fae75f78a00732868aa27bc54442d5e3 SHA-1: 2797f9a26067c3515848bf64e8084102ce65d71e SHA-256: 26e7c808f09bb26b459fb5673805eaa0b6a549470d0d8130f4a0db31eded2cc0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirector infrastructure, specifically promoting 'free generator / game hack' lures. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links indicate a phishing or scam attempt designed to redirect users to potentially harmful websites.

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-coin-master-spin-app-game-hack In PDF document text
    • http://martincoste.com/images/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://martincoste.com/images/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://martincoste.com/images/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://martincoste.com/images/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://martincoste.com/images/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://martincoste.com/images/roblox-imagine_GM431946152.pdfIn PDF document text
    • http://martincoste.com/images/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://martincoste.com/images/grabpoints-robux_GM431946152.pdfIn PDF document text
    • http://martincoste.com/images/coin-master-free-spins-link-whatsapp-group_GM406889139.pdfIn PDF document text
    • http://martincoste.com/images/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://martincoste.com/images/coin-master-free-attack-link_GM406889139.pdfIn PDF document text
    • http://martincoste.com/images/minecraft-free-download-android_GM479516143.pdfIn PDF document text
    • http://martincoste.com/images/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • http://martincoste.com/images/coin-master-spin-and-coins-free_GM406889139.pdfIn PDF document text
    • http://martincoste.com/images/coin-master-free-spins-link-app-download_GM406889139.pdfIn PDF document text
    • http://martincoste.com/images/how-to-get-2021-robux-for-free_GM431946152.pdfIn PDF document text
    • http://martincoste.com/images/coin-master-bonus_GM406889139.pdfIn PDF document text
    • http://martincoste.com/images/minecraft-free-apk_GM479516143.pdfIn PDF document text
    • http://martincoste.com/images/coin-master-game-hack-app_GM406889139.pdfIn PDF document text
    • http://martincoste.com/images/coin-master-hack-no-survey_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_off00004982.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4982 26056 bytes
SHA-256: 3faaef98d75f10dd9fac249773965200337587e2918e16381bd94b2a0849bb2a
font_01_sfnt_off00008551.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8551 17884 bytes
SHA-256: 6a5fc0e5ee3990f98fff047e5d02c1443490e61ce795861dff478bab25fb071a

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