Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b1e4d56cb02fa2c…

MALICIOUS

PDF

35.4 KB Created: 2021-07-04 19:38:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 3e097b52720af06b9aabe85402f0c1b0 SHA-1: 61d6c27b10eb81d93e0f0adcdf867996615bab65 SHA-256: 7b1e4d56cb02fa2c85a31bd2b91092bafd949e780e893429b51069c27d284a34
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of external links, many of which are SEO-optimized and point to potentially malicious content related to game hacks and free in-game currency. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external URIs suggests a link farm or redirection scheme. The document body, though partially corrupted, contains a primary URL that aligns with the heuristic findings.

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/best-clothes-on-roblox-for-free-game-hack PDF link annotation
    • http://digilib.stimlog.ac.id/repository/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-admin-no-download-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/roblox-sign-in-free_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/raindrop-roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/hex-number-gives-free-robux-by-robuxian_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-jailbreak-infinite-money-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/all-free-items-in-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/minecraft-net-download-free_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/daily-coin-master-free-spin-apk_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-golden-suit-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/maxim-games-free-robuxcom_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/kuso-ico-roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-hack-any-person-in-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/games-that-give-free-robux-without-pass_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/hacks-injector-roblox_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off00003381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3381 22560 bytes
SHA-256: fb44871822fd9bb656c0e9dc2b6eea554a6dc341936e6104bae75c24ef55a5d2
font_01_sfnt_off000065d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65D7 18920 bytes
SHA-256: eed580741243e389f16034686209f36a0734be1d04c681220662e91dd1fdbe3b

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