Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ebc734cb4b4996c…

MALICIOUS

PDF

70.2 KB Created: 2020-12-09 14:59:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4478926e8396ccfb05e54e22c5285359 SHA-1: df138bf20a7c375d61415cb33b90f5770ec1adaf SHA-256: 0ebc734cb4b4996c5d6666b5f9d3ca9741071886a1e54813d9d4c12c662a81cb
214 Risk Score

Malware Insights

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

This PDF file contains embedded links that redirect to known malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The ML classifier and ClamAV also flagged this file as malicious, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. The document body, though heavily obfuscated, contains text related to 'Iphigenie auf Tauris', likely a lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://gettraff.ru/strik?utm_term=iphigenie+auf+tauris+thema
    • https://cdn-cms.f-static.net/uploads/4406170/normal_5fb80c995687f.pdf
    • https://cdn-cms.f-static.net/uploads/4500432/normal_5fad40df89256.pdf
    • https://sovuzozasofebod.weebly.com/uploads/1/3/4/3/134343281/cf89ba5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/97f75478-fab7-4e37-bb72-e514f7c1f0a0/minot_dmv_permit_test.pdf
    • https://uploads.strikinglycdn.com/files/411f6daa-cfd5-4a5f-b4d9-558b1ce36d1f/panasonic_nn-sd681s_review.pdf
    • https://uploads.strikinglycdn.com/files/182fc452-440d-4898-b594-c0f7cfb68959/harry_potter_world_guide.pdf
    • https://uploads.strikinglycdn.com/files/c2a4b77b-5669-4b30-ae25-a86322c7441b/45363175876.pdf
    • https://s3.amazonaws.com/vuraradaso/borifatizazatozifa.pdf
    • https://uploads.strikinglycdn.com/files/d1abbf4e-1222-4735-aa03-f4e671fdbc7d/themes_in_oedipus_rex.pdf
    • https://uploads.strikinglycdn.com/files/dbe20ab6-acd3-4763-b5f0-2fa746c0e461/fejaxiloleretawuviraje.pdf
    • https://uploads.strikinglycdn.com/files/19741382-e34e-486d-b1be-06a68d1149a2/koxukojuli.pdf
    • https://uploads.strikinglycdn.com/files/f10ee9a2-c8ac-4de0-9795-a0fde9ca4414/lee_seung_hoon_manga.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_off0000d2e1.bin
235150742925b9c2216e657421917e450e3a44c31c915e11964f3bca25a6859b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E1 5220 bytes
font_01_sfnt_off0000e486.bin
8c43f125aa0f951b8f3cad2f69b81b1c8bbdeec3fbbf7c4492e8ffd4bba8062b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE486 11652 bytes

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