Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3790b9d279d4893…

MALICIOUS

PDF

36.5 KB Created: 2021-07-09 04:14:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 364674eace33e56f7499f0303120b579 SHA-1: 7a5d4835a1ab9ab55a0e360c2a6b608423f7dadf SHA-256: a3790b9d279d48934f1f7d37807124a46516925fc5169efefd4d69d3d8e538d3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to malicious infrastructure, specifically advertising 'free generators' and 'game hacks' for popular games like Roblox. The heuristic firings confirm these links point to known malicious redirectors and a lure for free game items. While no scripts were explicitly extracted, the nature of the embedded links and the lure suggests a phishing or malware distribution attempt.

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.tw/app/431946152/roblox-hack-generator-game-hack In PDF document text
    • https://sensorcamera-tw.com/upload/files/free-stolen-roblox-games-download_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/minecraft-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/roblox-cheat-farbe_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/roblox-free-items-2021_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/free-robux-on-ipad-only_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/how-to-get-free-food-on-coin-master_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/coin-master-free-link_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/candy-ice-cream-simulator-roblox-script-hack_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/roblox-hack-ios_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/coin-master-fan-hack_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/roblox-pokemon-brick-bronze-cheats_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/how-to-get-roblox-premium-for-free-2021_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_off00003a82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3A82 21804 bytes
SHA-256: 73d2d6da33485e4cebdf64b969178c7a06551e3812446ec85658bb3b883c900f
font_01_sfnt_off00006a66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A66 18760 bytes
SHA-256: b79899937f6f59d67c0cc016ae9e295c0b2eeda93cfd6b0750b290eebb9c7341

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