Malicious PDF — malware analysis report

Static analysis result for SHA-256 33e15263ce7b9738…

MALICIOUS

PDF

62.1 KB Created: 2020-12-19 15:46:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb507d1775a82f054f0ae178723f893e SHA-1: 69d01f39907bafea55415f2b7492b5155d783f5c SHA-256: 33e15263ce7b973817b53a5ff029661b3c50975985d071464c643af605420764
156 Risk Score

Malware Insights

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

The PDF document contains a heuristic firing for PDF_SEO_LINK_FARM, indicating it is part of a link farm. It also includes an embedded URI pointing to 'trafficel.ru', which is likely a malicious or spam-related domain. The document body, though heavily obfuscated, suggests a lure related to an area code search, aiming to direct users to a network of external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafficel.ru/strik?utm_term=where+is+area+code+91208
    • https://xusawoji.weebly.com/uploads/1/3/0/7/130739635/7385048.pdf
    • https://static.s123-cdn-static.com/uploads/4393893/normal_5fc4743fdefa7.pdf
    • https://mogezisatizate.weebly.com/uploads/1/3/0/7/130775403/2027730.pdf
    • https://lagonola.weebly.com/uploads/1/3/4/8/134851586/973266ba162a.pdf
    • https://cdn-cms.f-static.net/uploads/4499285/normal_5fbc823712413.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdee3c61e25426e1fdbfef/1606282815327/madden_mobile_database.pdf
    • https://static1.squarespace.com/static/5fc5d7ae88c99b6d37c9377e/t/5fd17eea7c12252903eb4d28/1607565037829/91575846251.pdf
    • https://s3.amazonaws.com/zinudipir/friction_on_inclined_plane.pdf
    • https://static1.squarespace.com/static/5fc504ca17e7202640047e96/t/5fcbf7c5f94b6402b2041ac3/1607202764366/hashtags_for_instagram_artists.pdf
    • https://s3.amazonaws.com/minegikukovel/sugozifunef.pdf
    • https://s3.amazonaws.com/bevekizadoxuj/59545839605.pdf
    • https://static1.squarespace.com/static/5fc55a6c8139af037662c795/t/5fc94b92eff5963d37ca8cc7/1607027602549/76133989333.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_off0000b692.bin
2a1de0e438fdb70ee9448609b782f5dfdf0df5974137d775901bd18bbab3a6ae
pdf-font-stream PDF embedded font (sfnt) at offset 0xB692 5684 bytes
font_01_sfnt_off0000c9e9.bin
7e3ca9dff89a8d4032432ea24bd8701957f741c936e54facb9005fa3c64a7137
pdf-font-stream PDF embedded font (sfnt) at offset 0xC9E9 9948 bytes