Malicious PDF — malware analysis report

Static analysis result for SHA-256 9804513681ea8769…

MALICIOUS

PDF

68.0 KB Created: 2020-11-26 09:01:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d09df3acfec7688a37506ae7c501d7dc SHA-1: 527909ba4738d5e320cecbe1ccdb1627c16e9b13 SHA-256: 9804513681ea87693021158c23caadf5d0e49d4f10191795b2c621e17fd0bcf3
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also flagged this PDF with high confidence. The embedded URL is likely intended to lure the user to a phishing site or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=justin+tv+soccer
    • https://cdn-cms.f-static.net/uploads/4401559/normal_5faffd73327a9.pdf
    • https://cdn-cms.f-static.net/uploads/4424630/normal_5fa269136c086.pdf
    • https://cdn-cms.f-static.net/uploads/4424328/normal_5fb4a1b67e50e.pdf
    • https://cdn-cms.f-static.net/uploads/4471969/normal_5fb29938d07c2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/rorives/liwaju.pdf
    • https://s3.amazonaws.com/gidibesuxi/double_bed_sheet_sets_kmart.pdf
    • https://s3.amazonaws.com/bulolimepol/vigerejeva.pdf
    • https://s3.amazonaws.com/mipizaju/print_june_2018_calendar.pdf
    • https://s3.amazonaws.com/tadovu/xowejono.pdf
    • https://s3.amazonaws.com/jufowokedunod/pdf_file_online_editor.pdf
    • https://s3.amazonaws.com/dotivaf/windows_10_enterprise_ltsb_microsoft.pdf
    • https://s3.amazonaws.com/suxiweke/borderlands_the_pre_sequel_gibbed_paste_codes.pdf
    • https://s3.amazonaws.com/sivanira/dazak.pdf
    • https://s3.amazonaws.com/winumigutam/jimabitifugorodipe.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_off0000cda2.bin
3c9bb491aba70c009744e64250425f4d953cd82b8510d3d457c9de86178ba582		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCDA2 4600 bytes
font_01_sfnt_off0000dd5f.bin
1430dc9947c4873c88753166833348b272cf9fa79362c79c4fce44ceb9bf5916		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD5F 11340 bytes

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