Malicious PDF — malware analysis report

Static analysis result for SHA-256 889e81207fb2ca56…

MALICIOUS

PDF

71.1 KB Created: 2021-01-10 05:56:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 0299f02df1e57208b1954b0589010d17 SHA-1: 23856aa4df2c6ae07911284b9f525a5de2131631 SHA-256: 889e81207fb2ca5670898373cb277e122647257ca3b8d34b642f70848f8dcaa2
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, traffking.ru, which is likely part of a phishing attempt. The document body, though heavily obfuscated, suggests a lure related to educational materials. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to a malicious site for further exploitation.

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://traffking.ru/123?utm_term=reteach+and+skills+practice+workbook+grade+5+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4487381/normal_5ff88b88bbbd5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372737/normal_5fad906b2cc5b.pdfIn PDF document text
    • https://site-1218469.mozfiles.com/files/1218469/balancing_chemical_equations_homework_sheet_answer_key.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366020/normal_5fc3b4e598ef5.pdfIn PDF document text
    • https://site-1168299.mozfiles.com/files/1168299/buxijexixapoba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379370/normal_5f8f9bae62916.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452148/normal_5fd9492015c3c.pdfIn PDF document text
    • https://site-1168192.mozfiles.com/files/1168192/retro_game_collector_review.pdfIn PDF document text
    • https://site-1173675.mozfiles.com/files/1173675/bezilizowuzedizimuzenux.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/kopisigapub/create_empty_bitmap_android.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/oxford_picture_dictionary_english_persian.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/introduction_to_demography_and_population_studies.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/kaniliwazusoza.pdfIn PDF document text
    • https://s3.amazonaws.com/xonaxevetaf/jilaxixezopupaj.pdfIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/99588016146.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_off0000d6e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E4 5760 bytes
SHA-256: 2d44e7672dc546e383af6f381f0ecc3bd32f5f31dfebf672b0e187f32715f45d
font_01_sfnt_off0000ea8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8D 10632 bytes
SHA-256: e7c40c76bde48fa42865c65e81d04ff4af61d875dff7064e62b3e298c0961897

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