Malicious PDF — malware analysis report

Static analysis result for SHA-256 002a433d18722c63…

MALICIOUS

PDF

40.4 KB Created: 2020-11-03 09:15:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4cc04869e24215e2312efa3337bd1d3 SHA-1: d6f43b28d2925f8dcc64c149d5d7044572cf66f8 SHA-256: 002a433d18722c631d5bafd97db788f4189831d783f825a501def8cea4a5b4c4
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, disguised as a Samsung repair manual download. This link likely leads to the download of a second-stage payload. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://ggtraff.ru/123?keyword=samsung+repair+manual+download
    • https://cdn-cms.f-static.net/uploads/4387825/normal_5f9e3c80d7e07.pdf
    • https://cdn-cms.f-static.net/uploads/4366665/normal_5f8fd2a1333a0.pdf
    • https://vusuvorolom.weebly.com/uploads/1/3/4/5/134501440/4996686.pdf
    • https://jurarolo.weebly.com/uploads/1/3/4/3/134351512/9573659.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0506/5667/3979/files/bujalagizififenasuzipuz.pdf
    • https://s3.amazonaws.com/kakekojezutok/linux_network_administration_commands.pdf
    • https://s3.amazonaws.com/roxawo/bentuk_negara_amerika_serikat.pdf
    • https://s3.amazonaws.com/foneniz/48965429808.pdf
    • https://s3.amazonaws.com/nitatotol/73610980660.pdf
    • https://s3.amazonaws.com/xidulumexi/zevubakidu.pdf
    • https://s3.amazonaws.com/lakadutof/arthur_conan_doyle_biography.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ed9.bin
a759b04d5fef78139222a5f914efd12d6535c5e6b8b4b9423590efa644561a48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED9 5472 bytes
font_01_sfnt_off0000716b.bin
f4c515acdc05e7f520fe1be711ae5a97be5d09511b67a2c79c6293077f055723		 pdf-font-stream PDF embedded font (sfnt) at offset 0x716B 10528 bytes

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