Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecc04073185f2477…

MALICIOUS

PDF

76.7 KB Created: 2021-04-24 23:23:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1f32a72a4984188671c2b98fd4c994e SHA-1: 223c67b745515179ea11c06c8b49b7e7fe8168e4 SHA-256: ecc04073185f247722f88222d6cb3c6260e7affb5e55d1d897902bd77a11312a
126 Risk Score

Malware Insights

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

This PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or malware distribution attempt. It contains numerous embedded URLs, with a primary one pointing to 'xezojetit.ru', suggesting it's designed to redirect users to a potentially harmful site. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a title related to robots, which is likely a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xezojetit.ru/strik?utm_term=how+to+make+robots+for+beginners
    • https://cdn-cms.f-static.net/uploads/4499979/normal_602533cd81b72.pdf
    • https://cdn.sqhk.co/fuvebopeweb/ibjcjaW/lofaxowusewititu.pdf
    • http://subikizivuwen.22web.org/99730947545.pdf
    • https://static.s123-cdn-static.com/uploads/4369324/normal_5fe54c6dab036.pdf
    • https://cdn.sqhk.co/koditisalupe/Nicigij/roku_remote_online_download.pdf
    • https://cdn.sqhk.co/xujurovemu/dViihfz/ligub.pdf
    • https://cdn.sqhk.co/vebudirepo/hsoRnaC/fujetit.pdf
    • https://static.s123-cdn-static.com/uploads/4413978/normal_5fde6e897a9bc.pdf
    • https://cdn-cms.f-static.net/uploads/4410207/normal_60249cf965890.pdf
    • http://juniwasobevi.22web.org/14630649515.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zekakodususebu.epizy.com/nature_pictures_hd_wallpaper_3d.pdf
    • http://zaxukesaludu.epizy.com/kijez.pdf
    • https://uploads.strikinglycdn.com/files/3ae3d99f-ae39-41b0-a951-b18f1a22bd46/basic_english_grammar_book_1_teachers_resource_guide.pdf
    • https://0ea1ff7f-05b3-43a2-9744-178351a05ed1.filesusr.com/ugd/01f9b9_ed468c2f9a694ca2a3d11e18f9068e47.pdf?index=true
    • https://uploads.strikinglycdn.com/files/092cadba-6eeb-4554-a45a-33c64b2153f8/what_is_the_room_in_the_shining.pdf
    • https://eb62986f-0112-409a-9ebe-777412bc5c19.filesusr.com/ugd/26938b_234d9fc974ba40eea5344eef46f7d0f7.pdf?index=true
    • http://dufenujel.rf.gd/40752077327.pdf
    • http://kogurowifa.epizy.com/when_will_tokyo_ghoul_season_3_come_out_on_netflix.pdf
    • https://uploads.strikinglycdn.com/files/2ef2834c-5844-4661-8550-90efffa325e4/are_kitchenaid_appliances_considered_high_end.pdf
    • http://jopixerijoraraw.epizy.com/meditation_techniques_for_beginners.pdf
    • https://37976aa0-f55f-47d3-847a-8d185b13ebf6.filesusr.com/ugd/1d6212_86083d599843476194d27d5cbf3e9175.pdf?index=true
    • https://76bf09fe-c378-4d6f-baa9-beaf48595a8b.filesusr.com/ugd/61567a_184394bf80444128b29ff57ab87c31e5.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec02.bin
eb4345d9306a48853a7d493729fffeb8b5bedbf6646bac7eb2396111da0658b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC02 5312 bytes
font_01_sfnt_off0000fe07.bin
f2351918b9a843c4fd640100856316261c13fe7e56559574564d7ff917f64db8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE07 11632 bytes

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