Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc9b64940b28aff9…

MALICIOUS

PDF

44.0 KB Created: 2021-06-03 10:04:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: d03e98c57d8e8b3e0ca123ce6cb0070b SHA-1: 6c5ce14ef24662f16686556baac2af11b70721ef SHA-256: dc9b64940b28aff91a9b0ca9e8617034f558a98c1c82fd842d9481d974cce04a
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a fake CAPTCHA lure to deceive users into interacting with malicious links. The primary link, https://netcdn.online/app/431946152/robloxfun-com-generator-game-hack, redirects to a site offering game hacks, indicating a social engineering attempt to drive traffic to potentially malicious content. While no scripts were directly extracted, the PDF structure and embedded links suggest an exploitation vector for client execution, likely leading to further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.online/app/431946152/robloxfun-com-generator-game-hack In PDF document text
    • https://www.takathmanduhotel.com/userfiles/files/roblox-survey-for-robux_GM431946152.pdfIn PDF document text
    • https://www.takathmanduhotel.com/userfiles/files/how-to-get-free-hair-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.takathmanduhotel.com/userfiles/files/coin-master-hack-tool-generator_GM406889139.pdfIn PDF document text
    • https://www.takathmanduhotel.com/userfiles/files/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.takathmanduhotel.com/userfiles/files/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • https://www.takathmanduhotel.com/userfiles/files/how-to-hack-golden-card-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.takathmanduhotel.com/userfiles/files/free-robux_GM431946152.pdfIn PDF document text
    • https://www.takathmanduhotel.com/userfiles/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • https://www.takathmanduhotel.com/userfiles/files/coin-master-hack-tool-pc-download_GM406889139.pdfIn PDF document text
    • https://www.takathmanduhotel.com/userfiles/files/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • https://www.takathmanduhotel.com/userfiles/files/https-oprewards-com-roblox_GM431946152.pdfIn PDF document text
    • https://www.takathmanduhotel.com/userfiles/files/coin-master-hack-spin-generator-tool_GM406889139.pdfIn PDF document text
    • https://www.takathmanduhotel.com/userfiles/files/update-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.takathmanduhotel.com/userfiles/files/coin-master-free-spins-fb-champion_GM406889139.pdfIn PDF document text
    • https://www.takathmanduhotel.com/userfiles/files/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.takathmanduhotel.com/userfiles/files/free-400-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.takathmanduhotel.com/userfiles/files/free-roblox-accessories_GM431946152.pdfIn PDF document text
    • https://www.takathmanduhotel.com/userfiles/files/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • https://www.takathmanduhotel.com/userfiles/files/how-to-free-robux_GM431946152.pdfIn PDF document text
    • https://www.takathmanduhotel.com/userfiles/files/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f4c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F4C 25256 bytes
SHA-256: a8e25acbc44acb4d334d89f508eaf79b430e34b8607c8dc3ea8c0260cd196d3a
font_01_sfnt_off00008896.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8896 18516 bytes
SHA-256: c214cdc5875b8c54705917548ad95da7f9ccbf3c1d69b6e52c4f4c9c63cb00fa

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