Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad848eed00d88341…

MALICIOUS

PDF

76.5 KB Created: 2020-12-03 00:21:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 36c6b9f179e7e5a94f50b86d6b012b1c SHA-1: 9aa26964a5d8b12dfce10cb07295712b5486e59b SHA-256: ad848eed00d8834127c8c34f1c0646b4458c58092550bb6e96d45b990a8b0867
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://traffking.ru/wb?keyword=formation%20administrateur%20systeme%20cours%20du%20soir In PDF document text
    • https://cdn-cms.f-static.net/uploads/4447276/normal_5fb87f31bc971.pdfIn PDF document text
    • https://revasogivez.weebly.com/uploads/1/3/4/5/134589678/95cfe8883ca66ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473916/normal_5faf8b1f94269.pdfIn PDF document text
    • https://rubajamepufukav.weebly.com/uploads/1/3/4/4/134432722/993151.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366306/normal_5f88a8bd50fdf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468827/normal_5fb5b55386a15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411218/normal_5fb8845900315.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378845/normal_5f997592f3aea.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/5fbce344be7cfc36344e8aaf/t/5fbdf22a9d7936484053bc0a/1606283818263/acid_bases_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6de6a0ba-cfa2-40cf-b451-24b33603d882/zobexijefoxugomarudubage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10f677bc-fab9-4ec2-a831-88c317d189eb/budugawo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4843d81f-fd08-4bde-a44e-43e5b9e77697/colors_and_numbers_are_adjectives.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd0d26c7afe470b5589277/1606225195029/gabidaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/298b796d-07c5-4021-b1b9-734841ed8309/country_code_011503.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe0f609d7936484056124f/1606291297501/marotebuwenuzebidir.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_off0000dd24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD24 4992 bytes
SHA-256: 4a040fc160002fd1eb88e4feb97acdb9473b86a572b41c67d7946774d8861489
font_01_sfnt_off0000ee03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE03 12476 bytes
SHA-256: aba4c2bf1309bf3ce7ca4b640af62bf4e8b13e945bc3af9f467e28923e8139c6
font_02_sfnt_off00011515.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11515 4324 bytes
SHA-256: 8405bb6ca9a6fb718a2e910e1cdde4d74ac2122cab0061dc5f772322db9c7ccd

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