Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c1b9be460d706b6…

MALICIOUS

PDF

44.8 KB Created: 2021-06-08 13:29:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d130765e284cd6442777125b52b74b2f SHA-1: 703ff726ce9c4b72dcaca344921f34471b41b579 SHA-256: 1c1b9be460d706b6a6a0bb611ff207be265a3104f15e498c12c0d8c77db7e9c6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically promoting 'free generators' and 'game hacks'. The primary malicious URL identified is https://netcdn.tw/app/431946152/appbounty-robux-hack-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a social engineering lure designed to redirect users to potentially harmful content.

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/appbounty-robux-hack-game-hack In PDF document text
    • http://d-cision.nl/images/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • http://d-cision.nl/images/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://d-cision.nl/images/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://d-cision.nl/images/roblox-studio-how-to-add-music-for-free_GM431946152.pdfIn PDF document text
    • http://d-cision.nl/images/free-robux-app_GM431946152.pdfIn PDF document text
    • http://d-cision.nl/images/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://d-cision.nl/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://d-cision.nl/images/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://d-cision.nl/images/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • http://d-cision.nl/images/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://d-cision.nl/images/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • http://d-cision.nl/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://d-cision.nl/images/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • http://d-cision.nl/images/pubg-uc-hack-season-9_GM1330123889.pdfIn PDF document text
    • http://d-cision.nl/images/how-to-get-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://d-cision.nl/images/roblox-hack-app_GM431946152.pdfIn PDF document text
    • http://d-cision.nl/images/minecraft-hacker-mask_GM479516143.pdfIn PDF document text
    • http://d-cision.nl/images/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://d-cision.nl/images/free-roebucks-no-human-verification_GM431946152.pdfIn PDF document text
    • http://d-cision.nl/images/minecraft-survival-hacks_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_off00004ec5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EC5 26232 bytes
SHA-256: 568449c70be6d8d05638634b8045ab93f1f21f308bb8fccdaacd675c572393aa
font_01_sfnt_off00008b19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B19 18708 bytes
SHA-256: 38b5f7bf515bd5228bf2f2ab662dc8e8ac725422fde1c099fe916b14b8681fa7

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