Malicious PDF — malware analysis report

Static analysis result for SHA-256 e03e6899b8a02b78…

MALICIOUS

PDF

75.1 KB Created: 2021-01-10 23:22:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 9dde278110033ee15578b5bb839aab8c SHA-1: 949b798cb63bbf55ff3625368b358b33acbaa9f2 SHA-256: e03e6899b8a02b784d817353d4aefa10d671aebfb4a3ea767a780d06b455a261
214 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure. The presence of a large number of embedded links, many pointing to external PDFs, suggests a link farm or phishing attempt. While no scripts were explicitly extracted, the PDF structure and the malicious URL indicate an attempt to redirect the user to a harmful site.

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://ggtraff.ru/wb?keyword=alpha%20squadron%202%20edge%20of%20oblivion In PDF document text
    • https://nogigeto.weebly.com/uploads/1/3/4/6/134665346/litododif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481155/normal_5fdc3ff17027c.pdfIn PDF document text
    • https://zomerasojukoluw.weebly.com/uploads/1/3/4/7/134769652/bokirelakomubin.pdfIn PDF document text
    • https://cdn.sqhk.co/paxepilekot/ezdwPgi/voremalimegog.pdfIn PDF document text
    • https://site-1172565.mozfiles.com/files/1172565/tor_browser_download_linux_terminal.pdfIn PDF document text
    • https://cdn.sqhk.co/lituxopevuk/fOejdKo/usa_truck_driver_18_wheeler.pdfIn PDF document text
    • https://site-1178139.mozfiles.com/files/1178139/just_color_picker_download_for_windows_10.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/76693176991.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/oracle_sql_queries_interview_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/najipavez/fatuzanorajipufoboxa.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/goodman_capf1824b6_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/clark_rubber_foam_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/african_lovebirds_care_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/fjllrven_polar_guide_parka_herr.pdfIn PDF document text
    • https://s3.amazonaws.com/befafuni/connectwise_university_answers.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE861 5748 bytes
SHA-256: ad3b9cb58d7e176fc28dbe69d16f40f9995cb2a59019e2d373990fbbb3b70cb0
font_01_sfnt_off0000fbea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBEA 10380 bytes
SHA-256: 088e53fbb66339869409ee1ebdd20bb605823b6e8bc021a13b1eb6bd42d5f213

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