Malicious PDF — malware analysis report

Static analysis result for SHA-256 4edd66b420baf3ec…

MALICIOUS

PDF

32.5 KB Created: 2021-07-04 20:44:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 56a5b200fdedf31c91244d3ca79286fd SHA-1: d0a7db0f72c351f8a93cc788292b3ca2d7d63be8 SHA-256: 4edd66b420baf3ec8aa38f660af64d94a6709079da3b2dae4a6951ff05fe3d18
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically targeting users interested in game hacks and free in-game currency like Robux. The ML classifier also flagged this PDF as malicious. While no scripts were extracted, the embedded URLs and the nature of the lures strongly suggest a phishing or scam campaign designed to lead users to potentially harmful content or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/real-free-robux-codes-game-hack In PDF document text
    • http://sttlets.education/senayan//repository/coin-master-raid-hack_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/free-roblox-gift-card-codes-2021-june_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/free-bc-for-roblox-codes_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/roblox-toys-codes-hack_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/roblox-hack-pour-passer-a-travers-les-murs-2021_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/is-hacking-on-roblox-illegal_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/roblox-builders-club-free_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/how-to-get-free-clothes-on-roblox-without-bc-2021_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/websites-which-gives-you-free-robux-no-human-verication_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/no-catch-free-robux_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/rare-roblox-hacked-face_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/coin-master-hack-apk-35-8_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/roblox-pet-simulator-free-vip-servers_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/minecraft-apk-download-free-11-055_GM479516143.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/free-stuff-for-roblox-create_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/coin-master-free-spin-link-twitter_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_off00002b14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B14 21572 bytes
SHA-256: e45b66d6c4bae82ecd68bb246e0f7756276e303da439df329235cee365c033df
font_01_sfnt_off00005a45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A45 18964 bytes
SHA-256: 9bf96aa8fc5477a53da022985f8b40c56c69568a39855eae0c096d595955e7d3

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