Malicious PDF — malware analysis report

Static analysis result for SHA-256 cae80dab1b9260f6…

MALICIOUS

PDF

37.0 KB Created: 2021-06-28 16:38:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d3eb8db21bc05df362478a4ecf8f76c3 SHA-1: 2a88470167d42c3b78f68ad7a90be990be954b15 SHA-256: cae80dab1b9260f67b3acd7c134dfa248ae61fce1928bd0a7fc82bd9a6660b08
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as "game hacks" or "free currency" generators. The primary lure directs users to http://netcdn.co/app/431946152/how-to-change-your-password-on-roblox-for-free-2021-game-hack, which is flagged as malicious. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful sites.

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/how-to-change-your-password-on-roblox-for-free-2021-game-hack In PDF document text
    • https://www.modestuae.com/uploaded_files/userfiles/files/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • https://www.modestuae.com/uploaded_files/userfiles/files/robux-offer-wall_GM431946152.pdfIn PDF document text
    • https://www.modestuae.com/uploaded_files/userfiles/files/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • https://www.modestuae.com/uploaded_files/userfiles/files/roblox-sex-hack-script_GM431946152.pdfIn PDF document text
    • https://www.modestuae.com/uploaded_files/userfiles/files/coin-master-spin-hack-link_GM406889139.pdfIn PDF document text
    • https://www.modestuae.com/uploaded_files/userfiles/files/coin-master-free-spins-16-04-19_GM406889139.pdfIn PDF document text
    • https://www.modestuae.com/uploaded_files/userfiles/files/free-tiktok-followers-no-human-verification-or-survey_GM835599320.pdfIn PDF document text
    • https://www.modestuae.com/uploaded_files/userfiles/files/instant-robux_GM431946152.pdfIn PDF document text
    • https://www.modestuae.com/uploaded_files/userfiles/files/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • https://www.modestuae.com/uploaded_files/userfiles/files/coin-master-spins_GM406889139.pdfIn PDF document text
    • https://www.modestuae.com/uploaded_files/userfiles/files/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://www.modestuae.com/uploaded_files/userfiles/files/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.modestuae.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • https://www.modestuae.com/uploaded_files/userfiles/files/price-of-pubg-uc_GM1330123889.pdfIn PDF document text
    • https://www.modestuae.com/uploaded_files/userfiles/files/coin-master-free-coins-and-spins-hack_GM406889139.pdfIn PDF document text
    • https://www.modestuae.com/uploaded_files/userfiles/files/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdfIn PDF document text
    • https://www.modestuae.com/uploaded_files/userfiles/files/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • https://www.modestuae.com/uploaded_files/userfiles/files/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • https://www.modestuae.com/uploaded_files/userfiles/files/how-to-hack-roblox-trackid-sp006_GM431946152.pdfIn PDF document text
    • https://www.modestuae.com/uploaded_files/userfiles/files/pubg-uc-earning-app-2021_GM1330123889.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off000034db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34DB 23040 bytes
SHA-256: ffbf3bb7c00fca69cb61940a382f888f327abca2172f070f0d444d7170898540
font_01_sfnt_off000068e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68E5 20012 bytes
SHA-256: 2f6a7fab06ff3534558b4ad25717acd3ca02ed462e974f9c18bee68bd1569c96

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