Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1efef02873efea4…

MALICIOUS

PDF

48.4 KB Created: 2021-06-09 09:47:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 34684efdab8cf8681638fa3323b1e8ac SHA-1: 0ab6098f80b335d6d041d146bb5a3d89518bfd70 SHA-256: c1efef02873efea44ed4c6fde908e13af89e512dce1c0cf04415b54d71dee92f
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, presented as a lure for hacking game-related content, which is a common tactic for distributing malware or phishing. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to attract users. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.tw/app/431946152/how-to-hack-roblox-jailbreak-xbox-one-game-hack PDF link annotation
    • http://possumholler.us/images/download-coin-master-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://possumholler.us/images/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://possumholler.us/images/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • http://possumholler.us/images/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://possumholler.us/images/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://possumholler.us/images/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://possumholler.us/images/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://possumholler.us/images/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://possumholler.us/images/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://possumholler.us/images/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://possumholler.us/images/pokemon-go-free-yanmega_GM1094591345.pdfIn PDF document text
    • http://possumholler.us/images/free-followers-for-tiktok_GM835599320.pdfIn PDF document text
    • http://possumholler.us/images/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://possumholler.us/images/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://possumholler.us/images/how-to-get-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://possumholler.us/images/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://possumholler.us/images/elemental-battle-grounds-hack-roblox_GM431946152.pdfIn PDF document text
    • http://possumholler.us/images/minecraft-java-edition-free-download_GM479516143.pdfIn PDF document text
    • http://possumholler.us/images/free-minecraft-server-hosting-with-plugins_GM479516143.pdfIn PDF document text
    • http://possumholler.us/images/tiktok-for-free_GM835599320.pdfIn 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_off00004e57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E57 27736 bytes
SHA-256: 972b031509e6094b12a0455732ac23073007db352b434ab3693954c8931c11c6
font_01_sfnt_off00008e03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E03 3400 bytes
SHA-256: 4b3e0f36ad1e0c7e3ea5c178fd2b4f097d1e01575fc6a4101a8b520db34dfe07
font_02_sfnt_off0000992c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x992C 18632 bytes
SHA-256: bc64e6f3f9d31d2e3cad599027147b971957e7575db3dcd2581fa1e3a45c23e8

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