Malicious PDF — malware analysis report

Static analysis result for SHA-256 eee83352e51044c7…

MALICIOUS

PDF

83.9 KB Created: 2021-03-20 10:05:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: e982a715cda0dea19ad7fa9c38c4db03 SHA-1: 50e4ba7a82b62c11605257cd6e4fb9bf7569a706 SHA-256: eee83352e51044c7f9ad1c850f3dd013afdd2193f437b2107a9e50f62fa9aa1f
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 hosting or link farms, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a lure designed to redirect users to malicious content, likely for credential harvesting or malware distribution.

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://pelibifir.ru/strik?utm_term=average+salary+of+a+teacher+in+columbus+ohio PDF link annotation
    • https://togoxijagujeg.weebly.com/uploads/1/3/0/7/130775712/wepis.pdfIn PDF document text
    • https://guxedujigizos.weebly.com/uploads/1/3/4/7/134735137/8777559.pdfIn PDF document text
    • http://ig-copyrightnoticehelp.com/how_many_volumes_of_tokyo_ghoul_root_a_are_thererdp5x.pdfIn PDF document text
    • https://cdn.sqhk.co/nasubivapu/5Lib1rF/electrical_calculator_cost.pdfIn PDF document text
    • https://cdn.sqhk.co/senuziker/eyPyhgj/the_chosen_matthew_actor.pdfIn PDF document text
    • http://bekasopeli.22web.org/tekup.pdfIn PDF document text
    • http://xivoxuvawet.iblogger.org/fewinavevufemobudenilis.pdfIn PDF document text
    • http://pupesotiv.22web.org/tufibunesukisajizovazilid.pdfIn PDF document text
    • https://cdn.sqhk.co/lozuzupadis/igH1jds/53693272896.pdfIn PDF document text
    • https://jixawapideraje.weebly.com/uploads/1/3/3/9/133997308/4052964.pdfIn PDF document text
    • http://kersita.space/stop_and_think_social_skills_programjh4b7.pdfIn PDF document text
    • http://shopwithsale.website/beamforming_netgear_orbiwb8am.pdfIn PDF document text
    • https://wefikugozakilo.weebly.com/uploads/1/3/1/0/131069992/1025190.pdfIn PDF document text
    • https://cdn.sqhk.co/jinubodilev/dnWhbgg/download_game_robot_city_battle_mod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://ropugefax.epizy.com/double_consonant_worksheet_for_kindergarten.pdfIn PDF document text
    • http://numivonef.rf.gd/nipagudege.pdfIn PDF document text
    • http://rifukaleriduji.rf.gd/14172229154.pdfIn PDF document text
    • http://muwovulal.epizy.com/rufaduvexixulixagezagir.pdfIn PDF document text
    • http://simupofeni.rf.gd/20863034376.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d872.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD872 5468 bytes
SHA-256: a6d2c0e96493cb280dad285bdfc88b48d4f08a1b4725e0331faa1eec405775dc
font_01_sfnt_off0000eaeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAEB 11176 bytes
SHA-256: 4e53ee0355104dc327ae62226e6f039b2f5a4a61d308f529436dbb0367ebbdbb
font_02_sfnt_off000110eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110EB 16684 bytes
SHA-256: 4cd55fee6c52bbab32ed20b0b25846bff407090075fa0ab45dc9808449a8eeb0
font_03_sfnt_off00012806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12806 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
font_04_sfnt_off00013606.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13606 2740 bytes
SHA-256: df4fc428fae34a1924c25135f9deb5fe50dbd295018d5be0898efbf4ad11dd35

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