Malicious PDF — malware analysis report

Static analysis result for SHA-256 39f38c509395e6c9…

MALICIOUS

PDF

48.0 KB Created: 2021-06-10 22:30:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 8beddd9298a415193a6fd34312628f3a SHA-1: 971e2307962ce6d5d36f093f738abd983183c24f SHA-256: 39f38c509395e6c9d90981c7627e3743275b5bc0e8edd39899612bdaa14f0082
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically promoting game hacks. The document body and heuristics indicate a lure to download potentially unwanted or malicious content. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/hack-roblox.com-2021-game-hack In PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-daily-free-cards_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-hack-online-no-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/www-robux-us_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/pokemon-go-free-zangoose_GM1094591345.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-moderators_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-spin-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-make-a-free-server-in-minecraft-java_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/microsoft-rewards-roblox_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-robux-admin-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/admin-commands-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/www-roblox-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-star-codes-roblox_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-free-100-spin-link_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-spins-heaven_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000052bc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52BC 24484 bytes
SHA-256: 502a119d3a32a90399d6e3e619a5cfb66e04222b572dda1aa6e8248a36ba9615
font_01_sfnt_off00008b00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B00 2876 bytes
SHA-256: 0f99604d55dac6626711b4d750768ca349af54a6e3d7fe8709188b59b2479d46
font_02_sfnt_off000094e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94E8 19560 bytes
SHA-256: 600b72a201a8989f3fea0769f2051042c6190d8953de068da0093dbb57743ef2

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