Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3b88d28bccc90ec…

MALICIOUS

PDF

43.5 KB Created: 2021-06-03 07:59:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: a706390a1b5caff345653b8a3ee92e10 SHA-1: 9d1c75bffd980f7fc2a18ea936037852d0a39bf4 SHA-256: c3b88d28bccc90ecf955e89cbb4d81bc608f5be386f01718ddf71e4a859d334f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded URLs and a high-confidence ML classifier firing, indicating malicious intent. The document body and heuristics suggest a lure for downloading game cheats or in-game currency, which is a common tactic for distributing malware. The presence of multiple URLs pointing to similar content reinforces the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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 https://netcdn.online/app/431946152/roblox-earn-free-robux-games-game-hack PDF link annotation
    • https://fridaytravelnepal.com/userfiles/files/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-can-i-get-free-coinsn-coin-master_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-tiktok-likes-no-human-verification-or-downloading-apps_GM835599320.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-spins-coin-master-ios-links_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/minecraft-free-play-now_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-password-hacker_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/pubg-uc-account_GM1330123889.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-robux-obby_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/minecraft-pe-hacks-ios_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-hack-quora_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/cm-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/what-is-wurst_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-get-minecraft-realms-for-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004e41.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E41 24540 bytes
SHA-256: fe272ff6eece99257125731d13080567000bf793f086f4eb48fcc9ee6f40dee5
font_01_sfnt_off00008655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8655 18576 bytes
SHA-256: 1001b9d35277e7a53c115fbd1a3f257590375b27f4624ec4ed8875e564b8987c

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