Malicious PDF — malware analysis report

Static analysis result for SHA-256 1834657ca4fc521a…

MALICIOUS

PDF

45.9 KB Created: 2021-05-19 18:03:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5a05f9a3fb2f3c281c8057e34f81294a SHA-1: 8eab57bcf62b0aeedd600d7eb30eb0033f67b49d SHA-256: 1834657ca4fc521a2605a45c4f26cf4cd0c27e33da8974227256191be382d8f2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites that are flagged as malicious redirectors, specifically promoting 'game hacks' and 'free generators' for popular games. The presence of these links and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content. No scripts were extracted, but the document's structure and embedded URLs strongly suggest a phishing or 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 https://netcdn.xyz/app/431946152/hacked-roblox-accounts-list-game-hack In PDF document text
    • http://bob-reid.co.uk/uploads/files/files/roblox-hacked-version_GM431946152.pdfIn PDF document text
    • http://bob-reid.co.uk/uploads/files/files/roblox-rape_GM431946152.pdfIn PDF document text
    • http://bob-reid.co.uk/uploads/files/files/free-game-packs-for-coin-master_GM406889139.pdfIn PDF document text
    • http://bob-reid.co.uk/uploads/files/files/coin-master-tool-hack_GM406889139.pdfIn PDF document text
    • http://bob-reid.co.uk/uploads/files/files/coin-master-hack-online-no-human-verification_GM406889139.pdfIn PDF document text
    • http://bob-reid.co.uk/uploads/files/files/how-to-get-a-free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://bob-reid.co.uk/uploads/files/files/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://bob-reid.co.uk/uploads/files/files/minecraft-114-4-download-free_GM479516143.pdfIn PDF document text
    • http://bob-reid.co.uk/uploads/files/files/robux-online_GM431946152.pdfIn PDF document text
    • http://bob-reid.co.uk/uploads/files/files/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://bob-reid.co.uk/uploads/files/files/games-in-roblox-that-give-you-robux_GM431946152.pdfIn PDF document text
    • http://bob-reid.co.uk/uploads/files/files/minecraft-free-download-mac-full-version_GM479516143.pdfIn PDF document text
    • http://bob-reid.co.uk/uploads/files/files/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • http://bob-reid.co.uk/uploads/files/files/free-robux-android_GM431946152.pdfIn PDF document text
    • http://bob-reid.co.uk/uploads/files/files/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://bob-reid.co.uk/uploads/files/files/coin-master-hack-tool-ios_GM406889139.pdfIn PDF document text
    • http://bob-reid.co.uk/uploads/files/files/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
    • http://bob-reid.co.uk/uploads/files/files/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://bob-reid.co.uk/uploads/files/files/is-pokemon-go-free-on-nintendo-switch_GM1094591345.pdfIn PDF document text
    • http://bob-reid.co.uk/uploads/files/files/coin-master-free-spins-link-download-for-iphone_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_off00004e07.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E07 29636 bytes
SHA-256: 4977693f08af0be8d62e62a63867dc7e2c9443ea45b7383dd65eb03988287fea
font_01_sfnt_off00008fb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FB1 18720 bytes
SHA-256: 4364cdcc1b4e431b6a7cfc51a44ccbde59c7a972961f4ddbd0871ac7a20bc545

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