Malicious PDF — malware analysis report

Static analysis result for SHA-256 419eb901520c02ed…

MALICIOUS

PDF

78.5 KB Created: 2020-12-14 23:35:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 7839c22145237d16c6edb3864f8861cf SHA-1: a972e09164d5d7b1664fef32be35bbaadda627ae SHA-256: 419eb901520c02ed219df3b00cee75b2055b409cdb46bfdaca9366bb63e23e18
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a known malicious redirector. The ML classifier also flagged this PDF as malicious. The document body is heavily obfuscated, but the presence of numerous external links suggests an attempt to direct users to potentially harmful websites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffmen.ru/123?utm_term=the+myth+jackie+chan+song In PDF document text
    • https://static.s123-cdn-static.com/uploads/4475588/normal_5fcaf3afe61ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377674/normal_5fc32f30cf451.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372377/normal_5f901e3701d74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401971/normal_5f9ee9c98f8cf.pdfIn PDF document text
    • https://xosavufubat.weebly.com/uploads/1/3/4/3/134346154/gogego.pdfIn PDF document text
    • https://kutisujazuj.weebly.com/uploads/1/3/4/6/134625744/junos_waleremiwavot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/vovopafubipu/66726651844.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/97528136951.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/40659625205.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1630612facd59ceb05ffc/t/5fcd00f60ab5d62febf57ef3/1607270647210/burger_king_near_me_now.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0fe012e537a05ef0995e2/t/5fc94e2a86d9856143dbc839/1607028266646/cookie_crush_game_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/tazopaju/bifatavelevezomika.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc52c6ef7cf8c7540469f10/t/5fd6858e267c8d0ace4c9dfe/1607894415303/m_b_shah_commission_report.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1CA 5904 bytes
SHA-256: b8341a65cfe6fc2028ba86a17e5264a453e50a51821431022f92118a01c893c0
font_01_sfnt_off0000e5a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A5 5064 bytes
SHA-256: 4b53e89b1c044c8a0b7e95e14b7c3a3ec499487bf178fa71aca32099cc239019
font_02_sfnt_off0000f6c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C9 11472 bytes
SHA-256: 723891c2390d13355bf3a53820e9e3231eaa0e8b770e5d55d80e9a5418b6984b
font_03_sfnt_off00011d2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D2C 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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