Malicious PDF — malware analysis report

Static analysis result for SHA-256 426c8678107ce804…

MALICIOUS

PDF

34.7 KB Created: 2021-07-06 22:13:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 34942fd79dfd11e1a8181700917c0924 SHA-1: 7fb1db326f1a3555fa3fe9c4bb634f5f89a5997b SHA-256: 426c8678107ce8044640d26de67e6af050036b8e8bc013ce8e6abfac7cf39be3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirector infrastructure, specifically promoting 'game hacks' and 'free Robux'. The ML classifier strongly flagged this PDF as malicious. The embedded URLs likely lead to further malicious content or phishing pages, aiming to trick users into downloading malware or divulging sensitive information. No scripts were extracted, but the document's structure and embedded URLs indicate a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/robux-game-hack In PDF document text
    • http://www.readandenjoy.ae/userfiles/files/free-roblox-dominus_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/roblox-dungeon-quest-hack-script_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/coin-master-hack-uk_GM406889139.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/hack-coin-master-spin-android_GM406889139.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/gamecraft-org-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/roblox-xbox-free-items_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/free-minecraft-coins_GM479516143.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/minecraft-cracked-client_GM479516143.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/is-minecraft-bedrock-free_GM479516143.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
font_00_sfnt_off00003065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3065 22880 bytes
SHA-256: 9c7e5c72f68d39f9209af022e31dc63445084e3c73f976053f7a0c99b5f2358c
font_01_sfnt_off000063ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63EA 18552 bytes
SHA-256: da1723751bedafcb1f5ccdcef895f5533c90f7cf63bf49ed0807a84e3f782e55

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