Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c6a29c191b8de8b…

MALICIOUS

PDF

33.8 KB Created: 2021-07-05 01:09:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ae01c47f9856b726f2568a4784668ffb SHA-1: 12b1b05c7585097007ad4b70584cca022be7827d SHA-256: 2c6a29c191b8de8b8bc1220b0a1ed98b79069e41cf956b7bd141558dc7f7fe2b
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links and a direct URL to external resources, likely intended to trick users into downloading malware under the guise of free game currency or hacks. The ML classifier strongly indicated maliciousness, and the PDF structure suggests a link farm designed for SEO poisoning to attract victims. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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/431946152/www-free-robux-game-hack PDF link annotation
    • https://opac.heritagejkt.org/repository/free-vetement-roblox_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/roblox-owo-whats-this-t-shirt-free_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/free-robux-for-free_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/coin-master-free-mighty-lion-card_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/coin-master-free-spin-group_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/roblox-hack-explorer-2021-6-1-2021_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/free-robux-generater-no-survey-human-verefercation_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/roblox-rewards-robux_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/how-to-create-gui-roblox-hack_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/roblox-earn_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/get-robux-free-no-hack_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/150-dollar-roblox-redeem-codes-free-no-survey_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/how-to-change-name-in-roblox-free_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/coin-master-free-spin-link-daily_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/coin-master-cheats-free-spins_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/how-to-get-robux-back-if-i-was-hacked-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_off00002c5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C5A 22496 bytes
SHA-256: fe4ce2e6b7f1bc1a800238688d24cdbeccae53fd1d0020efdcc3f330b95e4e04
font_01_sfnt_off00005eba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EBA 19080 bytes
SHA-256: acf5ca21e1b57f7804790e88d3c8e797014eccbd964a564fa6b8ab1e1ef3ee82

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