Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e1289c4876bf8fa…

MALICIOUS

PDF

44.1 KB Created: 2021-06-09 03:52:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 73f3490d9a80394579835c1a780b91a7 SHA-1: 60be3b566ce6ec1e3f64350f325f247c17902e8b SHA-256: 1e1289c4876bf8fa9473685a1fd867cb4b070cf3580deb5ea174120cbae02241
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous embedded URLs, forming a link farm designed to redirect users to external sites, likely for malicious downloads or further phishing. The document body and embedded links suggest a lure related to game hacks and free in-game currency, a common tactic for distributing malware or conducting scams. The ML classifier strongly indicates malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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/robux-hack-no-download-or-survey-2021-game-hack
    • https://ciudadata.ec/images/ckfinder/files/coin-master-fun-free-spins_GM406889139.pdf
    • https://ciudadata.ec/images/ckfinder/files/minecraft-mods-download-free_GM479516143.pdf
    • https://ciudadata.ec/images/ckfinder/files/how-to-get-robux-for-free-2021_GM431946152.pdf
    • https://ciudadata.ec/images/ckfinder/files/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdf
    • https://ciudadata.ec/images/ckfinder/files/how-to-hack-coin-master-ios-no-jailbreak_GM406889139.pdf
    • https://ciudadata.ec/images/ckfinder/files/near-tiktok-free-fire_GM835599320.pdf
    • https://ciudadata.ec/images/ckfinder/files/free-robux-generator-for-roblox-2021_GM431946152.pdf
    • https://ciudadata.ec/images/ckfinder/files/coin-master-hack-pro-gamers_GM406889139.pdf
    • https://ciudadata.ec/images/ckfinder/files/daily-free-spins-on-coin-master_GM406889139.pdf
    • https://ciudadata.ec/images/ckfinder/files/coin-master-free-spin-and-coins-links_GM406889139.pdf
    • https://ciudadata.ec/images/ckfinder/files/daily-free-spins-coin-master_GM406889139.pdf
    • https://ciudadata.ec/images/ckfinder/files/how-to-hack-coin-master-with-game-guardian_GM406889139.pdf
    • https://ciudadata.ec/images/ckfinder/files/free-spins-on-coin-master-cheat_GM406889139.pdf
    • https://ciudadata.ec/images/ckfinder/files/minecraft-pe-hacks-2021_GM479516143.pdf
    • https://ciudadata.ec/images/ckfinder/files/coin-master-hack-2021-apk-download_GM406889139.pdf
    • https://ciudadata.ec/images/ckfinder/files/robux-game-com_GM431946152.pdf
    • https://ciudadata.ec/images/ckfinder/files/coin-master-rewards_GM406889139.pdf
    • https://ciudadata.ec/images/ckfinder/files/free-coins-coin-master-link-today_GM406889139.pdf
    • https://ciudadata.ec/images/ckfinder/files/how-to-hack-for-free-gamepasses-on-roblox_GM431946152.pdf
    • https://ciudadata.ec/images/ckfinder/files/free-spin-link_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d89.bin
aa97dcee1c7028610ec35f0ff28a8a1d6facb8fb33cd8beff9f9044e2af4ee45
pdf-font-stream PDF embedded font (sfnt) at offset 0x4D89 25136 bytes
font_01_sfnt_off000086a0.bin
bcd4c407da502ffa172612ed25994cdb02460e7f5f5dc703688ac7ff56324ab7
pdf-font-stream PDF embedded font (sfnt) at offset 0x86A0 19524 bytes