Malicious PDF — malware analysis report

Static analysis result for SHA-256 220ac7754ef1c9da…

MALICIOUS

PDF

68.4 KB Created: 2021-02-28 01:51:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 79ba76b042d3265ee3f444c7f12eac3e SHA-1: deb24eefe31d6e4f985418ea459ea0a8578ed447 SHA-256: 220ac7754ef1c9da42e2c8e4ae8424b2b53486a6a0b68d6b191784f15af69d59
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain ('dugedepap.ru') that is likely used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content.

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://dugedepap.ru/strik?utm_term=iced+caramel+mocha+dunkin+donuts+calories PDF link annotation
    • http://redpandarecycling.com/doxodenegatuvofofiwubx2uqv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pizoxuwa.epizy.com/bach_piano_sheet_music.pdfIn PDF document text
    • http://tuzekesomumar.rf.gd/senevajazobidafetuwenitu.pdfIn PDF document text
    • http://fufagagebo.epizy.com/gusajiwofiwu.pdfIn PDF document text
    • http://gokifipoka.epizy.com/2mm_rubber_sheet_bunnings.pdfIn PDF document text
    • http://zufagubiles.epizy.com/lake_glenville_fishing_report.pdfIn PDF document text
    • http://sulojigemijat.rf.gd/38663681075.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/bon_appetit_katy_perry_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/sika_armatec_110_epocem_product_data_sheet.pdfIn PDF document text
    • http://butevagowug.epizy.com/tank_hydro_test_report.pdfIn PDF document text
    • http://wunozoviwo.epizy.com/battlefield_1_pc_highly_compressed.pdfIn PDF document text
    • http://vowaxuf.rf.gd/drawing_line_graphs_worksheets_year_5.pdfIn PDF document text
    • http://datidogebe.epizy.com/litamajikesegekatifonapa.pdfIn PDF document text
    • http://gikunipif.epizy.com/wizotoninidevufo.pdfIn PDF document text
    • http://nirobow.epizy.com/gmetrix_excel_practice_test_3_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/libeganot/adobe_air_apk_mirror.pdfIn PDF document text
    • http://vowipinarofesax.epizy.com/60940285513.pdfIn PDF document text
    • http://nufagogofuj.epizy.com/50238636987.pdfIn PDF document text
    • http://bajobakokela.epizy.com/earthbound_onett_guide.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_off0000cd7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD7F 5180 bytes
SHA-256: 3621c62691662218045e630716ecf1658f4e0a25e0bcc189bfd40b8955123f83
font_01_sfnt_off0000deeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEEB 10868 bytes
SHA-256: c70cd8b9f77ac29e0677c5e9048a0fe4eea9750d6b10bac9b9b783b8ac3f982b

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