Malicious PDF — malware analysis report

Static analysis result for SHA-256 2931ac4d81e5ac7a…

MALICIOUS

PDF

49.3 KB Created: 2021-06-11 05:31:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 291133745746e021c5a44e5449721bd4 SHA-1: a9b241ab3039992ba99fca58f66e810b2521019b SHA-256: 2931ac4d81e5ac7ab3e7643deaebb0f2648cb75a3219e703c9ee8a6078759090
100 Risk Score

Malware Insights

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

The PDF contains embedded links that point to known malicious redirector infrastructure, specifically leading to a page about hacking Roblox. The ML classifier also flagged this PDF as malicious with high confidence. The presence of a download button lure further supports the malicious intent of directing users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/how-to-hack-roblox-using-cheat-engine-6.6-game-hack In PDF document text
    • http://library.imz.or.id/repository/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/hacks-para-mad-city-roblox-rock-split_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/the-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/freecoins_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/coin-master-fan-page_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/how-to-get-free-skins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/comment-hacker-sur-roblox-admin_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/my-minecraft-account-was-hacked_GM479516143.pdfIn PDF document text
    • http://library.imz.or.id/repository/ww-roblox-come_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/coin-master-hack-2021-no-survey_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/how-to-get-minecraft-dungeons-for-free_GM479516143.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/coin-master-pc-hack-download_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-robux-com_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000520b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x520B 27484 bytes
SHA-256: 7298cb98d18561b832f8cf1d9e0f7c025b67201165d7d03ab99c294965663f8e
font_01_sfnt_off0000909b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x909B 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00009a86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A86 19444 bytes
SHA-256: f5944c3c091e1c85906e1e5d3678517b14d18d384594b1d7ccf8d62c0865ee07

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