Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bd35cc7d2ef6324…

MALICIOUS

PDF

47.3 KB Created: 2021-06-08 12:36:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: afbdf81a2d24d1e5c01ab6d032d6f4ce SHA-1: 088dc88c03be722c8db8ce82b83a5fbcbe0db02a SHA-256: 4bd35cc7d2ef63243267ceeb80327e0020b191851d6febee460771a70c98b916
82 Risk Score

Malware Insights

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

The document contains lures related to hacking accounts and obtaining free in-game items, which is a common tactic for credential harvesting or malware distribution. The presence of multiple links to external domains, some of which are related to game exploits and cheats, further supports this. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.tw/app/431946152/how-do-you-hack-someones-account-on-roblox-game-hack PDF link annotation
    • http://foo.com.tw/files/free-spins-promo-code-for-coin-master_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://foo.com.tw/files/cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/coin-master-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/roblox-assassin_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/how-to-get-more-followers-on-tiktok-free_GM835599320.pdfIn PDF document text
    • http://foo.com.tw/files/free-24-7-minecraft-server_GM479516143.pdfIn PDF document text
    • http://foo.com.tw/files/coin-master-hack-game-download-mod-apk_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/claim-free-robux_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/when-was-minecraft-free_GM479516143.pdfIn PDF document text
    • http://foo.com.tw/files/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdfIn PDF document text
    • http://foo.com.tw/files/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/free-tiktok-likes-and-followers_GM835599320.pdfIn PDF document text
    • http://foo.com.tw/files/free-minecraft-skins_GM479516143.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
stream_004_off00004c4f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C4F 26048 bytes
SHA-256: 658efba8b2e3acf876c9b741589425fb39fe63cb78bdce94e3c3c57178d8f75f
font_01_sfnt_off00008946.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8946 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00009330.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9330 19180 bytes
SHA-256: 45291e413044e78f53e420f0d2c9cb1bd247684afa135409496941bb3e7734b3

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