Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff43bf585cce864d…

MALICIOUS

PDF

44.4 KB Created: 2021-06-11 06:02:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f36e167eab4780d283d91d10008ae429 SHA-1: ace716dc773ef22d47be33b389b2242c20ab3427 SHA-256: ff43bf585cce864d71faafab2661234e15b9749f4404c86c2327632ec2abd2b0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, masquerading as "game hacks" or "free generators". The primary lure URL is https://netcdn.tw/app/431946152/hack-para-tener-robux-rapido-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it's designed to redirect users to potentially harmful content, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/hack-para-tener-robux-rapido-game-hack In PDF document text
    • http://arpinoturismo.it/images/roblox-free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • http://arpinoturismo.it/images/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://arpinoturismo.it/images/hacks-for-roblox-script-reader_GM431946152.pdfIn PDF document text
    • http://arpinoturismo.it/images/minecraft-bedrock-edition-hacks_GM479516143.pdfIn PDF document text
    • http://arpinoturismo.it/images/how-to-get-on-bloxburg-for-free-on-roblox-tablet_GM431946152.pdfIn PDF document text
    • http://arpinoturismo.it/images/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://arpinoturismo.it/images/roblox-how-to-get-any-gamepass-free_GM431946152.pdfIn PDF document text
    • http://arpinoturismo.it/images/roblox-executor-free-download_GM431946152.pdfIn PDF document text
    • http://arpinoturismo.it/images/coin-master-official-website_GM406889139.pdfIn PDF document text
    • http://arpinoturismo.it/images/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://arpinoturismo.it/images/20-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://arpinoturismo.it/images/coin-master-link_GM406889139.pdfIn PDF document text
    • http://arpinoturismo.it/images/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • http://arpinoturismo.it/images/alert-before-hack-roblox_GM431946152.pdfIn PDF document text
    • http://arpinoturismo.it/images/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://arpinoturismo.it/images/roblox-login-hack_GM431946152.pdfIn PDF document text
    • http://arpinoturismo.it/images/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://arpinoturismo.it/images/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
    • http://arpinoturismo.it/images/free-robux-obby_GM431946152.pdfIn PDF document text
    • http://arpinoturismo.it/images/free-bedrock-minecraft_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
stream_004_off00004fb7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FB7 24936 bytes
SHA-256: 240d85c4a7ca21d513669e2b4d8cecb6caf222416928981c3d3292cca27f2fc8
font_01_sfnt_off00008930.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8930 18872 bytes
SHA-256: 19bbc61a02530eab4c7946351872eab0d44f2baf3079eabead6e2913b033717e

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