Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2bd8dda958b63bf…

MALICIOUS

PDF

34.3 KB Created: 2021-06-27 03:37:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a6844d67f8af30eaaa8cbe905e559b00 SHA-1: dce99cb6ccac9f5a77158af72c5b8dab085010c4 SHA-256: c2bd8dda958b63bfba8e6dbfec0971cb2a23271f41da16e959fd45a71d336163
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a critical heuristic firing for a game hack redirect lure, pointing to a specific URL. This URL is also present in the document body, reinforcing the lure. The ML classifier also flagged this PDF as malicious. The primary attack pattern involves tricking users into visiting a malicious link under the guise of obtaining free in-game currency or hacks.

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.co/app/431946152/get-free-robux-on-android-game-hack In PDF document text
    • https://www.nara.org.uk/uploads/files/files/how-to-get-free-bc-on-roblox-ios_GM431946152.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/group-free-robux_GM431946152.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/coin-master-game-free_GM406889139.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/how-to-hack-roblox-catalog-2021_GM431946152.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/free-robux-exploit-2021-no-virus_GM431946152.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/roblox-free-followers-generator_GM431946152.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/minecraft-apk-free-download_GM479516143.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/roblox-hacks-vermillion_GM431946152.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/rbx-tools-free-robux_GM431946152.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/coin-master-hack-mod-apk_GM406889139.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/download-coin-master-apk-hacked_GM406889139.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/glitch-that-gets-u-free-robux_GM431946152.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/free-robux-html-code-2021_GM431946152.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/rbx-hut_GM431946152.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_off00002ff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FF1 22080 bytes
SHA-256: 11de8eaf4ea3d5260f26d8e289bb33151285ad673987ca2105da34103080aa47
font_01_sfnt_off000060b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60B4 19112 bytes
SHA-256: bd117207a993086d2a710422386126b4a22b6f86706f95e61aa6db7c5420f94e

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