Malicious PDF — malware analysis report

Static analysis result for SHA-256 1177d616d18151f6…

MALICIOUS

PDF

61.4 KB Created: 2021-01-27 02:09:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: c35f8cc4efee1abb1d1c3b1d96645846 SHA-1: c310efeeb1fda3a52f4568750980319476028b01 SHA-256: 1177d616d18151f6836de81da94892277a17a0bdd7cd81189364cb5c8ff58db3
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs, with one specifically flagged as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and malicious URL suggest it's designed to lure users to a compromised site, likely for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • 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://yafferge.ru/123?utm_term=7+years+song+and+lyrics In PDF document text
    • http://pumba.fun/heat_vector_quantity_or_scalar_quantityt5tsw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452217/normal_5fed8e4a2f567.pdfIn PDF document text
    • http://senteber.site/435269875327jl5j.pdfIn PDF document text
    • http://instgrmmverifiedbadge.com/strike_force_arcade_fps_dominator_ps4y7240.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/levovod/xezenudabuzopozobeb.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/sarine_diamond_journey_report.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/swan_lake_op._20_violin_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/excel_assignments_for_college_students.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/94156228361.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/wifugetitadumot.pdfIn PDF document text
    • https://s3.amazonaws.com/mipizaju/72388636458.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/88011191046.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/butterball_electric_deep_fryer_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/potamotaz/16965023941.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/57715602627.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/newibisasafavizajuzal.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_off0000b4e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4E9 5196 bytes
SHA-256: 2655d85b5a18f46613e5b600c9ee66cf204332d3b2fa9488617906a5c1fc79db
font_01_sfnt_off0000c6a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6A8 10028 bytes
SHA-256: e82d2d3d9d21d58fb55f11d5c0084ab60fe10752915685eaadde0223be78f0d4

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