Malicious PDF — malware analysis report

Static analysis result for SHA-256 c916726e4413468c…

MALICIOUS

PDF

44.5 KB Created: 2021-06-09 14:56:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e415ae52a198a07f704613f92a6dbf36 SHA-1: 82a77bd03954fdf08d266b5aea6db161e9b78beb SHA-256: c916726e4413468c8747fe42f188cf39ae561157a8d853d1c2cf76f6b66f9a2e
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link that redirects to known malicious infrastructure, disguised as a download for a game hack. The ML classifier also flagged this PDF as malicious. The presence of a visual download button further supports the lure to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/five-nights-at-freddy In PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-free-spin-and-coin-link-2021-today_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-coin-master-glitches_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-coin-master-account_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/what-is-robux-in-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/robux-free-c_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/https-web-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/mcpe-master-hack-unlimited-coins-apk_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-hack-tool-india_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-get-free-coins-in-coin-master_GM406889139.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
stream_004_off0000506b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x506B 24460 bytes
SHA-256: de7a73dbe12ebcaa4fb560feb7db08651cb0df760e43744e89869a1c410a719a
font_01_sfnt_off000088a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88A0 19156 bytes
SHA-256: 018b108db3d23eb0cd74cc0d138333fe95920bca5cd08558bbb319f94ce2f983

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