Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8551660810780c6…

MALICIOUS

PDF

43.0 KB Created: 2021-05-14 22:32:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5da56b6eec5464063ef6d6465acadf16 SHA-1: 6b32dac71c4fe2ba0b8da42443286ce3dec188aa SHA-256: f8551660810780c6d4544de5739fa5a799e80006093d1c873e265ce01ac8ba92
82 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and a lure related to 'free Robux' for Roblox, indicating a phishing or scam attempt. The presence of ML_NYX_PDF_MALICIOUS and SE_MFA_LURE heuristics further supports a malicious classification, suggesting the document is designed to trick users into downloading a potentially harmful application or providing sensitive information. The document's content and embedded URLs point towards a malicious download lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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.xyz/app/431946152/blox.pink-free-robux-game-hack
    • http://dobrovodie.ru/images/free-coins-for-coin-master-blogger_GM406889139.pdf
    • http://dobrovodie.ru/images/free-coin-master-spins-daily_GM406889139.pdf
    • http://dobrovodie.ru/images/coin-master-mod-apk_GM406889139.pdf
    • http://dobrovodie.ru/images/free-robux-app_GM431946152.pdf
    • http://dobrovodie.ru/images/minecraft-classic-free_GM479516143.pdf
    • http://dobrovodie.ru/images/how-to-hack-coin-master_GM406889139.pdf
    • http://dobrovodie.ru/images/minecraft-bedrock-hacks_GM479516143.pdf
    • http://dobrovodie.ru/images/roblox-robux-hack-generator_GM431946152.pdf
    • http://dobrovodie.ru/images/coin-master-free-spins-daily_GM406889139.pdf
    • http://dobrovodie.ru/images/free-robux-without-any-verification_GM431946152.pdf
    • http://dobrovodie.ru/images/get-me-robux-for-free_GM431946152.pdf
    • http://dobrovodie.ru/images/coin-master-app-hacks_GM406889139.pdf
    • http://dobrovodie.ru/images/coin-master-daily-free-spins-link-today-blog_GM406889139.pdf
    • http://dobrovodie.ru/images/coin-master-free-gold-cards-link_GM406889139.pdf
    • http://dobrovodie.ru/images/coin-master-hack-unlimited-spins-apk_GM406889139.pdf
    • http://dobrovodie.ru/images/coin-master-hack-apk-ios-download_GM406889139.pdf
    • http://dobrovodie.ru/images/how-to-get-minecraft-windows-10-edition-for-free_GM479516143.pdf
    • http://dobrovodie.ru/images/coin-master-daily-free-spin-app_GM406889139.pdf
    • http://dobrovodie.ru/images/free-robux-websites-2021_GM431946152.pdf
    • http://dobrovodie.ru/images/free-robux-no-scam_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048f3.bin
89748d42893f7f1b3be1aced06131be8391b8bbe6c4c36b5ebea20f88f6ba1ee
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48F3 25548 bytes
font_01_sfnt_off000084da.bin
20ad8a2126bb9f489cd4862944fdd8c1c01869fd803457c3ce1390bedb89f69f
pdf-font-stream PDF embedded font (sfnt) at offset 0x84DA 18620 bytes