Malicious PDF — malware analysis report

Static analysis result for SHA-256 61320e5887e45aae…

MALICIOUS

PDF

34.9 KB Created: 2021-07-03 13:06:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 2ca4b031b274f1292864b17c01e74acd SHA-1: 3a8361699b1eae4a9ccc42d953048ec870c853e2 SHA-256: 61320e5887e45aae979060a90f16ab232c76d82244ac2a4ede3d77713aa5d3ff
102 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are SEO-optimized and point to game-related cheat or generator files. The ML classifier strongly indicated maliciousness, and the presence of a download button lure reinforces the deceptive nature of the document. The primary goal appears to be directing users to download potentially unwanted or malicious files disguised as game cheats.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/hack-coin-master-online-without-human-verification-game-hack PDF link annotation
    • http://www.my-travel.com.hk/upload/files/play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/free-online-generator-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/free-robux-no-download-on-ipad_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/coin-master-hack-no-verify_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/coin-master-level-4_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/moon-active_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/give-free-robux_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/coin-master-free-spins-link-download-free_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/free-robux-exe_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/how-to-get-roblox-hack-for-apocoleps-rizing_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/coin-master-free-redeem-code_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/free-boy-roblox-blue-hair-com_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/roblox-without-downloading-for-free_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/how-to-get-free-robux-2021-promo-codes_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/boku-no-roblox-remastered-hack-script_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/robux-hack-2021_GM431946152.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
font_00_sfnt_off00003068.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3068 22980 bytes
SHA-256: 36f5136d78a4ce951b7ebe7a215d1ca2ce0983abddcbb8ae0a4daac0421e2539
font_01_sfnt_off000063e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63E1 18976 bytes
SHA-256: 13ed96450f1ca0c8558518b51be81bb345bc5521d3e84d13ab13446cc1eb0e77

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