Malicious PDF — malware analysis report

Static analysis result for SHA-256 20481c26c8f69510…

MALICIOUS

PDF

62.6 KB Created: 2020-12-23 04:29:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 2f7b733bc925d67d72fef771c3db4a50 SHA-1: 49d0f2ba2bbd456681f7aa68c46574ae5e436e57 SHA-256: 20481c26c8f69510e672446380fac3211c83cd39e6b12a01f8911617a222cbe3
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that points to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, appears to contain product-related text, suggesting a lure for phishing or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://trafffe.ru/strik?utm_term=tanglefree+goose+decoy+bag PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370057/normal_5fc161f227f41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380692/normal_5f9dae8bc6fbd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469365/normal_5fe189a3b89e2.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/dalava/bsc_nursing_1st_year_syllabus_ruhs.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/commercial_building_design_guidelines.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc54e01085bf90c0e1a4b0c/t/5fd6e95089566e781f630754/1607919952448/affidavit_of_witness_format_philippines.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/82254484439.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/mole_conversion_practice_problems_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/sumerian_cuneiform_numbers.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/87005144209.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/create_jasper_report_in_java.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/brunch_word_formation.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_off0000baa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAA7 5380 bytes
SHA-256: 38bb858a5eeccf8d5452be6df1d228acaeedfa1363c58c41e3b2567a5b32bce7
font_01_sfnt_off0000cd0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD0A 9708 bytes
SHA-256: fac36bd14e47c9cf73823bd78d8fbf66d286bd24aeb467411f6579d3942c0f27

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