Malicious PDF — malware analysis report

Static analysis result for SHA-256 b702f8ae960bd9c6…

MALICIOUS

PDF

34.5 KB Created: 2021-06-18 14:02:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4881e019f47e35c8a87cf0c73fb86c8a SHA-1: 6b05feae44fa787ff6198ebd47e93c3c0e2a538b SHA-256: b702f8ae960bd9c6cbea2db3d43d2e5a0841f2dd061497ac6c0f240e0c8d2c2f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.co/app/431946152/free-robux-download-tool-game-hack. The document body and embedded URLs suggest a lure for free game currency or hacks, a common social engineering tactic. The ML classifier also strongly indicated maliciousness.

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/free-robux-download-tool-game-hack In PDF document text
    • https://diendientuvn.com/public/upload/files/free-robux-leggit_GM431946152.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/coin-master-hack-online-without-human-verification_GM406889139.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/roblox-hack-robber-simulator_GM431946152.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/free-robux-no-email_GM431946152.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/free-roblox-accounts-generator_GM431946152.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/aplicacion-rusa-para-free-robux_GM431946152.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/free-minecraft-windows-10-with-java_GM479516143.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/free-clothing-on-roblox-names-for-girls_GM431946152.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/free-robux-just-click_GM431946152.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/roblox-three-robux-hack_GM431946152.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/ear-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/free-robux-scams_GM431946152.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/coin-master-unlimited-spin-and-coin-hack_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
font_00_sfnt_off00002f85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F85 22232 bytes
SHA-256: 38b1fcb4fd93ca27cbb54d2b6c29790e21ff77e1594d7ab084fac246a9b8cbcc
font_01_sfnt_off000060d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60D7 19296 bytes
SHA-256: 0834fe11483575e36f20396563ca9d6a1ff6c4dcf8d0f75c48de311400fd781c