Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f52f9fe073e6cab…

MALICIOUS

PDF

47.1 KB Created: 2021-05-15 04:39:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 9e9bab07f55c309ec0f055a61a20b9fd SHA-1: 4970b687dd83e43cc35b47c088aca1c4976aaf55 SHA-256: 9f52f9fe073e6cabd808a12e49205f25979c370ad1957fedd4602bffe8aff262
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a document body that promotes 'hack tools' for games like Roblox and Coin Master, suggesting a lure for users to download malicious content. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, further supporting the malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the content strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/roblox-hack-tool-game-hack PDF link annotation
    • http://huananhai.net/images/coin-master-hack-2021-without-verification_GM406889139.pdfIn PDF document text
    • http://huananhai.net/images/minecraft-hack-2021_GM479516143.pdfIn PDF document text
    • http://huananhai.net/images/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • http://huananhai.net/images/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://huananhai.net/images/how-to-get-free-roblox-hair_GM431946152.pdfIn PDF document text
    • http://huananhai.net/images/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://huananhai.net/images/get-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://huananhai.net/images/how-to-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://huananhai.net/images/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://huananhai.net/images/free-spin-coin-master-hacktoman_GM406889139.pdfIn PDF document text
    • http://huananhai.net/images/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://huananhai.net/images/is-it-possible-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://huananhai.net/images/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://huananhai.net/images/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://huananhai.net/images/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://huananhai.net/images/minecraft-ps3-free-download_GM479516143.pdfIn PDF document text
    • http://huananhai.net/images/how-to-hack-coin-master-with-root_GM406889139.pdfIn PDF document text
    • http://huananhai.net/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://huananhai.net/images/how-to-get-free-gamepasses-on-roblox_GM431946152.pdfIn PDF document text
    • http://huananhai.net/images/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://rblx.landIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B74 26340 bytes
SHA-256: 9abf996b1cb54e36c74675c4d7958da7333adf344158ae4948c89ed9059d0a82
font_01_sfnt_off000088a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88A5 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off000095b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95B6 18184 bytes
SHA-256: 31a2c7908075477008558d8ad35fc874cd0c1469ac409190117581929eec3da7

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