Malicious PDF — malware analysis report

Static analysis result for SHA-256 c736fa0b359f2c72…

MALICIOUS

PDF

35.0 KB Created: 2021-06-30 07:11:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a9d4c5f38863c9f77b2b8e4a33390614 SHA-1: 1d6917e5d3575853ad2a6ac8d7d5e62b347b1b8c SHA-256: c736fa0b359f2c726a95408958e9b8bef8bf2991775fde73f90060a52e38e7ec
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are hosted on 'pakoles.com' and appear to be part of a link farm designed to attract users searching for game hacks and cheats. The presence of a 'download button' heuristic and the ML classifier's high confidence score indicate a malicious intent to direct users to potentially harmful content.

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.co/app/431946152/hack-jailbreak-roblox-2021-menu-game-hack PDF link annotation
    • http://pakoles.com/assets/CKImages/files/minecraft-apk-free-download-016-0_GM479516143.pdfIn PDF document text
    • http://pakoles.com/assets/CKImages/files/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • http://pakoles.com/assets/CKImages/files/robux-giving-free-robux_GM431946152.pdfIn PDF document text
    • http://pakoles.com/assets/CKImages/files/roblox-hxh-immortal-dream-level-xp-hack_GM431946152.pdfIn PDF document text
    • http://pakoles.com/assets/CKImages/files/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://pakoles.com/assets/CKImages/files/roblox-g_GM431946152.pdfIn PDF document text
    • http://pakoles.com/assets/CKImages/files/how-to-cheat-in-roblox_GM431946152.pdfIn PDF document text
    • http://pakoles.com/assets/CKImages/files/how-to-make-a-private-server-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://pakoles.com/assets/CKImages/files/free-texture-packs-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://pakoles.com/assets/CKImages/files/roblox-hack-wh_GM431946152.pdfIn PDF document text
    • http://pakoles.com/assets/CKImages/files/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://pakoles.com/assets/CKImages/files/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://pakoles.com/assets/CKImages/files/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://pakoles.com/assets/CKImages/files/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • http://pakoles.com/assets/CKImages/files/what-is-robux_GM431946152.pdfIn PDF document text
    • http://pakoles.com/assets/CKImages/files/coin-master-free-spin-link-twitter_GM406889139.pdfIn PDF document text
    • http://pakoles.com/assets/CKImages/files/enter-code-for-free-robux_GM431946152.pdfIn PDF document text
    • http://pakoles.com/assets/CKImages/files/coin-master-apk-free-download_GM406889139.pdfIn PDF document text
    • http://pakoles.com/assets/CKImages/files/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://pakoles.com/assets/CKImages/files/how-to-get-free-robux-indieun_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_off000030b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30B2 22196 bytes
SHA-256: f03f27a28a8087b77bde78cee9ed521af47d86e98b8da5a9fcc1acdd710a502b
font_01_sfnt_off000061f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61F8 19680 bytes
SHA-256: a637333aea65053aef6a88176f06184344bb675395aa7b1a9a5a5e0b1e844179

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