Malicious PDF — malware analysis report

Static analysis result for SHA-256 93a53f65360c32fa…

MALICIOUS

PDF

74.8 KB Created: 2021-02-17 17:16:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 926577b633620b557928944f94ef5bd2 SHA-1: a7a4783faaba218cf3646e96b31bb63834b63b9a SHA-256: 93a53f65360c32fa6f606247a9d76215f2fe8c106bae7d91e88330f016c8d7db
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, indicating a link farm designed to obscure malicious destinations. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a malicious tactic. While no scripts were explicitly extracted, the ML classifier and ClamAV detection confirm the malicious nature, likely through embedded JavaScript or exploit code within the PDF structure. The primary attack pattern involves directing users to external, potentially malicious, websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jottigo.ru/aws?utm_term=symbol+scanner+mc9090+cold+boot PDF link annotation
    • http://taxutipepavij.iblogger.org/vofixolikedugiwi.pdfIn PDF document text
    • http://podumurenuzus.22web.org/lanapamon.pdfIn PDF document text
    • http://goxuvux.22web.org/solo_songs_malayalam.pdfIn PDF document text
    • http://shoes-storie.club/ways_of_the_world_textbook_chapter_10i04yo.pdfIn PDF document text
    • https://cdn.sqhk.co/dofexoxev/ygfiSiD/fojagitalelaketemi.pdfIn PDF document text
    • https://xajimago.weebly.com/uploads/1/3/0/8/130813364/009287fb4c858c.pdfIn PDF document text
    • https://besaxujujugolu.weebly.com/uploads/1/3/0/7/130739491/nikemokewate.pdfIn PDF document text
    • http://my-favshop.online/fapowibamadutilom8ko0b.pdfIn PDF document text
    • http://vonowaz.iblogger.org/tewawewebogom.pdfIn PDF document text
    • http://hookup154.online/61074966630w7w2m.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/dfpjjbQ/57883008928.pdfIn PDF document text
    • http://pejofewetoz.22web.org/57383518238.pdfIn PDF document text
    • https://tuwanoxesoxeb.weebly.com/uploads/1/3/1/4/131438150/soxepakajixolak-bovutemegugida.pdfIn PDF document text
    • https://cdn.sqhk.co/fasazani/ihghb3d/thunderstorm_3d_live_wallpaper_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/todusukiraxi/ghjeGii/48571549398.pdfIn PDF document text
    • https://cdn.sqhk.co/tivinarafuvu/EWxihFv/digi_online_tv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kimovene.epizy.com/xerugapolebezirajojut.pdfIn PDF document text
    • http://dovagoxaluzof.rf.gd/86893355877.pdfIn PDF document text
    • http://kesobiw.rf.gd/mustache_template_file.pdfIn PDF document text
    • http://bowudizukeb.epizy.com/depawisagedugidelev.pdfIn PDF document text
    • http://pepojugatidi.epizy.com/77959650508.pdfIn PDF document text
    • http://ninamutarat.epizy.com/free_residential_building_plans.pdfIn PDF document text
    • http://memaded.epizy.com/tefuwonofomuvulikuwuj.pdfIn PDF document text
    • http://komadolosa.rf.gd/introductory_email_to_client_template.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_off0000e4c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C2 5728 bytes
SHA-256: 3b39596f2869e5d000bc8fb5efb19a1e35cb543c18cfd6777022a7609aa64db6
font_01_sfnt_off0000f826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF826 10800 bytes
SHA-256: 710a76d151dc91171b657a88b83e342a1b30b860dbea12fc9cbb3cb2ae47a267

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