Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eedd46f52db3299…

MALICIOUS

PDF

42.5 KB Created: 2021-05-17 17:07:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: aec920051dfeef1ef7a4f16c7f143a57 SHA-1: 08c8077ccee1dcd41382603e11368b0ed75b0669 SHA-256: 1eedd46f52db3299731f6163d679c3505fec838cf4987b611d290b4973db87cd
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous embedded links and a call-to-action phrase, strongly suggesting a phishing or social engineering attack. The primary URL and many others point to sites offering 'free Robux' or game hacks, a common lure for malware distribution or credential harvesting. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, further supporting the malicious intent of directing users to external, potentially harmful, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/431946152/get-free-robux-without-human-verification-game-hack PDF link annotation
    • http://zercalo.org/images/free-coins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/how-to-hack-coin-master-using-es-file_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/como-hackear-el-juego-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-free-spins-save_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/free-robux-just-click_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-free-spins-link-2021-march_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-support_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-gift-link_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/best-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-heaven-links_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/roblox-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/hack-robux_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-hack-ios-cydia_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/free-coin-master-account_GM406889139.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_003_off00004889.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4889 24540 bytes
SHA-256: bc0d4b376301c2b04c294a976849672a793f78de55ef084497a6da9502a129ca
font_01_sfnt_off000080ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80EA 19224 bytes
SHA-256: d26e558c8d9f3aa3a60cf99b5f2b698b808b007009279a89da7a3b2992804aa3

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