Malicious PDF — malware analysis report

Static analysis result for SHA-256 39302a8b995e97e0…

MALICIOUS

PDF

45.7 KB Created: 2021-06-07 15:02:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e0a995253272633b361f3e6ed15d173b SHA-1: c6e1e9a7f28ae29f38b885888f7121514bc67e71 SHA-256: 39302a8b995e97e0bf25047501b8b14349100a284b75f12055c7edc75473726b
82 Risk Score

Malware Insights

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

The PDF document contains a lure for free in-game items, impersonating Microsoft to trick users into clicking a malicious link. The link leads to a URL that is likely a phishing page or a download site for further malware. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple suspicious URLs reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 4

  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.tw/app/431946152/free-roblox-items-codes-2021-game-hack.
  • 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.tw/app/431946152/free-roblox-items-codes-2021-game-hack PDF link annotation
    • http://uo-nn.ru/images/coin-master-free-daily-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://uo-nn.ru/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://uo-nn.ru/images/free-roblox-premium_GM431946152.pdfIn PDF document text
    • http://uo-nn.ru/images/fake-robux-codes_GM431946152.pdfIn PDF document text
    • http://uo-nn.ru/images/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://uo-nn.ru/images/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://uo-nn.ru/images/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://uo-nn.ru/images/free-minecraft-hosting_GM479516143.pdfIn PDF document text
    • http://uo-nn.ru/images/minecraft-multiplayer-free_GM479516143.pdfIn PDF document text
    • http://uo-nn.ru/images/free-spins-coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://uo-nn.ru/images/pastebin-free-roblox-usernames_GM431946152.pdfIn PDF document text
    • http://uo-nn.ru/images/www-coin-master_GM406889139.pdfIn PDF document text
    • http://uo-nn.ru/images/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://uo-nn.ru/images/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://uo-nn.ru/images/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://uo-nn.ru/images/minecraft-18-9-hacked-client_GM479516143.pdfIn PDF document text
    • http://uo-nn.ru/images/minecraft-pe-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://uo-nn.ru/images/2021-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://uo-nn.ru/images/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://uo-nn.ru/images/i-want-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 4

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
stream_004_off00004f78.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F78 27184 bytes
SHA-256: a4fc5ccf2ea7a5d48e6f377f340ca01e5807a9596a0af47367ccb1baf902d1cf
font_01_sfnt_off00008e1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E1F 18888 bytes
SHA-256: f710e961ad9e4137b1db393c6f944e61deaeae5e3b03bf5b2d9ae173f0ac79d8

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