Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cd9f561c4f216bf…

MALICIOUS

PDF

34.8 KB Created: 2021-06-20 01:40:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: c1e54004e2c2953a976a97a34ab341f7 SHA-1: 80a3dcb05ce8bbec7f12c40761563e9fca3d27c8 SHA-256: 4cd9f561c4f216bfaf86f114051f2c71fc043d746ad94918a9be016aa80e2215
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs that point to a known malicious redirector infrastructure, disguised as 'free generator' or 'game hack' content. The document body explicitly mentions 'Free Robux Promo Codes 2021' and links to the malicious URL, indicating a social engineering lure to trick users into visiting potentially harmful sites. No scripts were extracted, but the PDF structure and embedded links strongly suggest a malicious redirector chain.

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/free-robux-promo-codes-2021-game-hack In PDF document text
    • https://anlathich.com/public/upload/files/coin-master-free-items_GM406889139.pdfIn PDF document text
    • https://anlathich.com/public/upload/files/fake-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • https://anlathich.com/public/upload/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://anlathich.com/public/upload/files/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • https://anlathich.com/public/upload/files/roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://anlathich.com/public/upload/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://anlathich.com/public/upload/files/free-2021-robux_GM431946152.pdfIn PDF document text
    • https://anlathich.com/public/upload/files/all-minecraft-handbooks_GM479516143.pdfIn PDF document text
    • https://anlathich.com/public/upload/files/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://anlathich.com/public/upload/files/1-000-subscriber-roblox-hack-tool_GM431946152.pdfIn PDF document text
    • https://anlathich.com/public/upload/files/hacks-for-bitcoin-miner-roblox_GM431946152.pdfIn PDF document text
    • https://anlathich.com/public/upload/files/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://anlathich.com/public/upload/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://anlathich.com/public/upload/files/free-generator-code-roblox_GM431946152.pdfIn PDF document text
    • https://anlathich.com/public/upload/files/the-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://anlathich.com/public/upload/files/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://anlathich.com/public/upload/files/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://anlathich.com/public/upload/files/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • https://anlathich.com/public/upload/files/free-robux-site_GM431946152.pdfIn PDF document text
    • https://anlathich.com/public/upload/files/free-robux-games_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_off00002f06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F06 22376 bytes
SHA-256: 3e45623c39ce038d7a70152ac8919f1101354a92b648b45d796553b0c80510aa
font_01_sfnt_off000060d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60D3 19708 bytes
SHA-256: 4ffa5120539f8d9e821cc62be6a3cc920cc67344a1ea2f390d2f58e18d351055

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