Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4ea3db1f83f622b…

MALICIOUS

PDF

79.8 KB Created: 2021-05-01 02:01:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 6385ad8ee50f12fcacc925e9cefd41c7 SHA-1: 97c8552430bd9f72a30f8da63aba3315c12b2366 SHA-256: f4ea3db1f83f622bf45d5be6edfc2099f9c011ded34ab411bda64d3be2c9e7b4
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are likely part of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports the phishing lure.

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=how+to+make+a+smoothie+without+yogurt+or+ice+cream PDF link annotation
    • http://gloslides.com/baruperyna3i.pdfIn PDF document text
    • http://sungo1.space/office_2019_standard_for_macy99og.pdfIn PDF document text
    • http://lozipazom.sportsontheweb.net/xarubirewizikotujoketex.pdfIn PDF document text
    • http://graatorama.space/biannca_prince_net_worth_2019bstqc.pdfIn PDF document text
    • http://rbqjkwklnd.xyz/the_lovesong_of_j._alfred_prufrock_summary_shmoop2y4kp.pdfIn PDF document text
    • http://madewithsunshine.com/league_of_legends_patch_notes_10.4owegc.pdfIn PDF document text
    • http://oneshops.space/94263805626xwz9f.pdfIn PDF document text
    • http://hallop.xyz/hamlet_1996_full_movie_online_freew61ly.pdfIn PDF document text
    • http://belplitka.ru/paradise_island_bowl_pricesieoi5.pdfIn PDF document text
    • http://asia.kiwi/complete_the_sentences_with_the_presa3i4w.pdfIn PDF document text
    • http://gegebafebofad.scienceontheweb.net/togumikavadejo.pdfIn PDF document text
    • http://discout.online/how_to_write_orbital_notation_with_arrowse3b2d.pdfIn PDF document text
    • http://alexandreablog.com/what_are_words_that_end_with_lysisv0hl4.pdfIn PDF document text
    • http://about-central.com/how_many_types_of_curriculum_evaluationvov5w.pdfIn PDF document text
    • http://bufo.online/4515711076h7ulv.pdfIn PDF document text
    • http://legugoboxebepe.22web.org/save_base64_to_file_javascript.pdfIn PDF document text
    • http://shop-kid-toys.online/multiple_regression_analysis_spss_youtubeelk1p.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rerorexemebiliv.epizy.com/dotanepadidifopavafuvis.pdfIn PDF document text
    • http://tejugezefufuli.rf.gd/minutes_of_meeting_template_latex.pdfIn PDF document text
    • http://wovoruvuluriba.epizy.com/kasugovusidaposajixezerod.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_off0000f8ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8AE 5400 bytes
SHA-256: 6d357974879b796d4a2c46d40035b65b66f4acc5d922b4754ec6f95253f6f780
font_01_sfnt_off00010af8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF8 11452 bytes
SHA-256: 4402ee6bcc7f02406cdaf8a929c304dbd2d1ef7cf55056847444a6b52525b2f2

Open this report in the interactive analyzer, or submit your own file for analysis.