Malicious PDF — malware analysis report

Static analysis result for SHA-256 18b04e3e960e535d…

MALICIOUS

PDF

67.3 KB Created: 2020-12-16 23:29:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: de4fe970b8a53add650867fb8497f040 SHA-1: b7491c5683fcc1eac458db12f4b6233d92976db2 SHA-256: 18b04e3e960e535dd8b634ea105c946e68c0e3e0e77f1ed2e8bcb6a13fe4f552
154 Risk Score

Malware Insights

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

The PDF contains a link to known malicious redirector infrastructure, disguised as a product deal. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the presence of a malicious URL and the document's deceptive content suggest it's designed to lead users to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gettraff.ru/123?utm_term=250gb+external+hard+drive In PDF document text
    • https://static.s123-cdn-static.com/uploads/4449422/normal_5fcd19464181b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453336/normal_5fbbcb28ef4ac.pdfIn PDF document text
    • https://fudegenajeno.weebly.com/uploads/1/3/4/5/134581691/1383465.pdfIn PDF document text
    • https://jorokepevi.weebly.com/uploads/1/3/4/6/134688072/9743083.pdfIn PDF document text
    • https://jixidaku.weebly.com/uploads/1/3/4/4/134495137/2886043.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390323/normal_5fb73bdeb8324.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492546/normal_5fae4e4aca76a.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://static1.squarespace.com/static/5fc109232cf09257bd6ccb44/t/5fc15a602dd96f591821fdf9/1606507107610/printer_printing_blank_pages.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc542159955c744b5580f48/t/5fd5f37fc4373837b9ffe541/1607857027598/jax_jungle_guide_s9.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd41ecc5cd8f70f4623e99/1606238701903/wiwuxegujovo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF4F 5160 bytes
SHA-256: 6b477ffc1ecb7e7f4d238acaecd9799b25f6a8fd7e4d3015b5595f990d98f174
font_01_sfnt_off0000d0bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0BF 9988 bytes
SHA-256: f17f19bd4b4f006cdb489053b9b232a940467f7f8567a36f7dcad8d6ef21164c
font_02_sfnt_off0000f2f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F7 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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