Malicious PDF — malware analysis report

Static analysis result for SHA-256 0035bf5736c328a9…

MALICIOUS

PDF

54.5 KB Created: 2020-11-03 13:23:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 636f5910a99471b4650a1966606b1f13 SHA-1: d18c86969fa57b71762d0b3002f8cc45702df087 SHA-256: 0035bf5736c328a9887bd0d0eee97058ce0648f86c0bcf2fafbf193e2c09d037
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, specifically a redirector designed to serve malicious content. The document body, though heavily obfuscated, contains a URL that appears to be a lure for free movie streaming, which is a common tactic for phishing or malware distribution. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://ggtraff.ru/aws?keyword=free+online+the+purge+anarchy+full+movie
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/7d7b6617ab8.pdf
    • https://tufelovewojamex.weebly.com/uploads/1/3/4/3/134331554/nakomora.pdf
    • https://feliwisinawo.weebly.com/uploads/1/3/1/8/131856919/a5d6f81080c86.pdf
    • https://kizozejibudi.weebly.com/uploads/1/3/4/4/134460324/7aff6ede43.pdf
    • https://zufesuvagudinaf.weebly.com/uploads/1/3/4/3/134321689/sikowojef_givov.pdf
    • https://cdn-cms.f-static.net/uploads/4373509/normal_5f9d46aa4399b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/ganubatebedoxez/94205412966.pdf
    • https://uploads.strikinglycdn.com/files/435a225f-d755-4583-9c4d-9b7012ea7fa6/sisanuje.pdf
    • https://s3.amazonaws.com/vezosoluvezoj/fx_audio_dac-x6_setup.pdf
    • https://uploads.strikinglycdn.com/files/143c1472-eb71-4a01-af65-ea27a1b18ee8/743719803.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_off000096db.bin
8823ac0481e22291a3db95d8ed21ceb648feff75ba969e6e63eb0c856e3940a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96DB 5368 bytes
font_01_sfnt_off0000a90e.bin
6c676c5e841d8b6c42428ceb7cad6fae8aac5538a224aaa513d1b8c5f25efaea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA90E 10552 bytes

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