Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd06117e2cbd6dfb…

MALICIOUS

PDF

65.5 KB Created: 2021-03-02 13:04:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 6ac2533169f3db3057bc00577238f72d SHA-1: aa50d66d4e6927b62db8cb7c2d68c356b503a26f SHA-256: dd06117e2cbd6dfbc5399bb54b0c4a9585397fb0241ea40b9e6b97ad135821fc
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The presence of external URIs and the overall structure strongly suggest this PDF is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=no+game+no+life+zero+wallpaper+abyss PDF link annotation
    • https://cdn.sqhk.co/jevamivuvugi/aiaiaig/beautiful_scenic_wallpapers_for_android.pdfIn PDF document text
    • http://otomail.business/how_do_place_value_charts_workdfule.pdfIn PDF document text
    • http://ctyr.ru/ice_sheets_growingopbga.pdfIn PDF document text
    • http://tehnopolis.org/jilumesavugonizosubigavodr4u1i.pdfIn PDF document text
    • http://g2am2e.xyz/pobadovemilo1bw9f.pdfIn PDF document text
    • http://sberbank.link/26806829302gotv0.pdfIn PDF document text
    • http://centerbluebadge.com/loan_affidavit_formatlpu14.pdfIn PDF document text
    • http://timecodes.net/glencoe_geometry_chapter_4_test_answer_key34gs7.pdfIn PDF document text
    • http://spain50off.info/introduction_to_probability_andersonvzv5x.pdfIn PDF document text
    • https://cdn.sqhk.co/pabukerofo/ehfhfNw/ambulance_siren_ringtone_download_mobcup.pdfIn PDF document text
    • http://kzrovk.xyz/947176764081xvkt.pdfIn PDF document text
    • http://aycotoro0.xyz/why_is_reading_literature_so_importanty0fly.pdfIn PDF document text
    • https://cdn.sqhk.co/bexuxoxabim/jbhglgh/30711621237.pdfIn PDF document text
    • http://goodxday.xyz/tarutizuvajitoop3by.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/sefabe/wenedoto.pdfIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/36_questions_that_lead_to_love_again.pdfIn PDF document text
    • https://s3.amazonaws.com/vebogotexaf/nassau_bahamas_local_weather_report.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_off0000c445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC445 5576 bytes
SHA-256: 1aa1710ab74790c5d6e80c286dc769fa947b22bb4f1f53f9495adf5adb5fa4fb
font_01_sfnt_off0000d74d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD74D 9860 bytes
SHA-256: 651e3d701e2d443f5bf7c8c21eacd55d1f5e623afda30950076854a21d6d5c98

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