Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca2b980e46f74a91…

MALICIOUS

PDF

33.1 KB Created: 2021-07-19 08:48:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6a1ab977744c079be72559b5be5adb25 SHA-1: 7478e85fbfc3d38be504a1b01d4eb0eb527d9c1c SHA-256: ca2b980e46f74a91a58b803530e7253b421a1d535b172ae1dba56f6aabdad81a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including a known malicious redirector at http://netcdn.tw/app/431946152/robux-hack-2021-game-hack, which is presented as a 'Robux Hack'. The document body also contains a call-to-action phrase 'CLICK HERE TO ACCESS ROBUX GENERATOR', indicating a social engineering lure to trick the user into downloading a potentially malicious payload. The presence of embedded URLs and the nature of the lures strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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-hack-2021-game-hack In PDF document text
    • http://bildhauerei-roerig.de/images/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/is-minecraft-free_GM479516143.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/claim-free-robux_GM431946152.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/roblox-hack-me_GM431946152.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/free-fans-on-tiktok_GM835599320.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/apps-to-get-free-robux_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_off000029c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29C2 23036 bytes
SHA-256: cb5afbe6c761edb61b1abedd86da86b6005390ddd1bb3729ab310d7a21f19cd6
font_01_sfnt_off00005d93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D93 18836 bytes
SHA-256: ad94fc69aa6b6efce6b7f50eee8b6d005acbd1b011ebbc598c5501659abc7a0f

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