Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd8362acb0b66aca…

MALICIOUS

PDF

33.6 KB Created: 2021-07-20 16:00:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: f9483cc409d6835e88026226c4613a50 SHA-1: b013d3e2823f21cdf4653db2632c111e0371b85f SHA-256: dd8362acb0b66aca162bd97356aa53d86937fa7d5e46c24588fd4071fd6ffbda
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links and a call-to-action button, luring users to a malicious redirector URL that promises free Robux. The ML classifier and the critical heuristic for malicious redirector links strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure itself facilitates the redirection, likely to a site that hosts further malicious content or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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 http://netcdn.tw/app/431946152/blox.pink-free-robux-game-hack In PDF document text
    • http://opac.stieimalang.ac.id/repository/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/minecraft-for-ipad-free_GM479516143.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/minecraft-free-download-iphone_GM479516143.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/how-to-get-free-tiktok-fans-without-human-verification_GM835599320.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 5

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002cd1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2CD1 22844 bytes
SHA-256: d3f91a12904cbe55b869247886b74ca8c46f6a6e70c5e53325680c4e4161ce07
font_01_sfnt_off00006025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6025 18804 bytes
SHA-256: 72e57b16c606111617af2f15f11cc1f5f936a03279de35537c1ac55cfa660f76

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