Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ec09dcfed2e2538…

MALICIOUS

PDF

233.4 KB Created: 2021-03-28 09:03:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: ea22569f7ae99564d47db9584e381de8 SHA-1: d94167e3e78bdbdaae7c0086c814da174ee73304 SHA-256: 8ec09dcfed2e253870c1ddc5764181bcfd99b4b9fa516ac9b4e3159582888719
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a lure referencing 'Hamlet full text with line numbers' to entice users to click a link. This link, identified as an SEO redirector, points to a phishing domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://druttle.ru/strik?utm_term=hamlet+full+text+with+line+numbers PDF link annotation
    • http://fufibubesex.iblogger.org/vlookup_formula_in_excel_2020.pdfIn PDF document text
    • http://bopokijik.iblogger.org/primary_adrenal_insufficiency.pdfIn PDF document text
    • http://elerctum.org/country_of_origin_labelling_australia_style_guideilq9a.pdfIn PDF document text
    • http://copyrightviolationcenters.com/jerozukasiva5buwm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379053/normal_5ff6bdffda48b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443598/normal_60084a611be56.pdfIn PDF document text
    • http://artdebug.site/la_crosse_atomic_clock_problems2n4f6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e81ad16-3f26-449d-b47f-53ff84f62b5d/xedisetaxifoxuxokawuja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d3bd7a2-8013-4479-bf92-9e6261a54cb8/fatexujaximevonotoje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e657c5c-1866-445a-80a3-2de6211e8b77/14051737431.pdfIn PDF document text
    • http://sutebavo.rf.gd/47835174692.pdfIn PDF document text
    • http://makidibe.epizy.com/does_my_hvac_have_a_dehumidifier.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dfdc68a-d136-4343-a39c-af9b94c10619/samsung_ue50tu8507uxxu_50_smart_4k_ultra_hd_hdr_led_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d1458c6-c616-4dca-bd60-cbb3ef96f2b6/the_pilgrims_progress_movie_2019_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6dabebe4-a5d2-4965-b567-c1d2d8eee7e8/jijuxavawidiritejej.pdfIn PDF document text
    • https://b7f5b04e-b247-49a4-9dc0-39f0c843ec09.filesusr.com/ugd/b56f86_2d3c7695609c4459a05bab0d5a6aa1c8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/193e2551-836e-4803-834b-1d2c5fe69b28/what_is_a_good_example_of_a_cause_and_effect.pdfIn PDF document text
    • https://cf2e1f24-e5f1-4289-9567-3affce9c164e.filesusr.com/ugd/a4ea6c_708e2df2fb1644bc810479c69e067daf.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00036185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36185 5268 bytes
SHA-256: 97710de1631b3a188fa27eadb12ac1162f00dc614c6f6b059a6a2dd985cb4919
font_01_sfnt_off00037358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x37358 10624 bytes
SHA-256: 405d4404e177545b1af272d994cf60fd784b62438021e5e06e8ef5191d821e63

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