Malicious PDF — malware analysis report

Static analysis result for SHA-256 79664b0be28f4e07…

MALICIOUS

PDF

36.4 KB Created: 2021-07-01 11:05:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b6f02815c52d98a55de9746923bd08fb SHA-1: 8a77c0547f4e4f3990651fcbb9dcc94d54af3425 SHA-256: 79664b0be28f4e07a2e37a8a4e8f77d0c8a0f670e1bc2f8f1d1cc9c9ff9ea8d1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector, masquerading as a 'free generator / game hack'. The document body explicitly mentions 'How To Get 2021 Robux For Free' and includes numerous URLs pointing to similar scam-like PDF files hosted on the same domain. This indicates a phishing or scam campaign designed to trick users into visiting malicious sites, likely for credential harvesting or further malware delivery.

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-get-2021-robux-for-free-proff-game-hack In PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/robux-today_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/coin-master-hack-with-facebook-login_GM406889139.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/coin-master-hacker-club_GM406889139.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/minecraft-java-free_GM479516143.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/daily-free-spins_GM406889139.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/minecraft-bedrock-edition-pc-download-free_GM479516143.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/free-free-robux_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/redeem-roblox-virtual-item-free_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/toolbox-for-minecraft-ios_GM479516143.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/what-roblox-game-gives-you-free-robux_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/roblox-free-clothes-template_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/free-robux-for-real-no-human-verification_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/lazyblocks-com-robux_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/roblox-hack-top-no-verification_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/roblox-verification_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/how-to-no-clip-in-roblox-no-hack_GM431946152.pdfIn PDF document text
    • https://zd407.com/ocean_shop1/admin/upload/files/how-to-get-free-premium-roblox_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
font_00_sfnt_off0000344b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x344B 22944 bytes
SHA-256: e2aa3510a173afc42a57c09ee84535fc58c268157211a9864ec030acc755d4ac
font_01_sfnt_off000067ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67CE 19540 bytes
SHA-256: c1fb57a39e3f5fbc62bbe6f7a550374fbb1d345e13283941c4385277da206057

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