Malicious PDF — malware analysis report

Static analysis result for SHA-256 c37a351d66f63936…

MALICIOUS

PDF

34.3 KB Created: 2021-07-09 19:45:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 2ad5fd2987f6088f3629b3c84194f510 SHA-1: 0393a2311a8f402232005a3804c8e45d5de41682 SHA-256: c37a351d66f639366cc9b10e0f063915e46ff3749738aabaaa8fa7340f8caf88
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are hosted on domains associated with link farms and SEO spam. The document body and extracted URLs promote 'hacks' and 'cheats' for games, suggesting a lure to download malicious payloads or engage in phishing. The ML classifier strongly indicated maliciousness, and the presence of a link farm further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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-chat-commands-hack-game-hack PDF link annotation
    • https://fridaytravelnepal.com/userfiles/files/how-to-get-free-robux-in-1-step_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-change-your-name-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-hack-anyone-in-roblox_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/tiktok-free-song_GM835599320.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-hilton-hotels-interview-hack_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-inappropriate_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-free-rare-accounts_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-heaven_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-robux-easy_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-robux-site_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-attack-hack-apk_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-get-pubg-uc-free_GM1330123889.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-robux-gen_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_off00002fb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FB1 22112 bytes
SHA-256: f3de2ec7bd69236b1a82cc35eb5de6f53de192226546742935c4ab3855b30142
font_01_sfnt_off000060b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60B6 19172 bytes
SHA-256: dc9114d89fa4fdd61cbdd24149a811c6cd821c98dae108c1f5e151c011f18c4d

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