Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c54867d63e42fbc…

MALICIOUS

PDF

36.3 KB Created: 2021-07-04 12:49:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 645bfa0acc699640c3d5ea83b11b1c77 SHA-1: b0556236745ba543c21002228971a1fa9084a912 SHA-256: 5c54867d63e42fbc4fce79a19b54f0666639e440f8fa92d02f32ce2a2f05dded
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically promoting a 'free generator / game hack'. The document body and embedded URLs reinforce this lure, aiming to trick users into visiting the malicious site. While no scripts were directly extracted, the PDF structure and heuristic firings strongly indicate a phishing or redirection attack.

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.tw/app/431946152/roblox-executor-free-game-hack In PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-get-money-in-roblox-for-free-ipad_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/blogspot-coin-master_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-key-free-spin_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-studio-free-download_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/was-minecraft-ever-free_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-hacks-that-work_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/get-free-robux-info_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-account-hack-pastebin_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-hack-a-roblox-game-2021_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-gain-more-spins-on-coin-master-for-free_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-win-robux_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/daily-coin-master-free-spin-link-facebook_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-hilton-hotels-interview-hack_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/minecraft-wurst-hacked-client_GM479516143.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_off000035bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35BD 23236 bytes
SHA-256: a5f2c894d65ffb73cc79c2fdfa1f518ee64241a533bd577075fc56f68f828fc8
font_01_sfnt_off00006a1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A1C 18708 bytes
SHA-256: 706ff9cbe401a1ce0b6808c025c5b2bdd5cc5410652f323461541fa33c78a8d7

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