Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee0a8fe2852b6ee0…

MALICIOUS

PDF

76.8 KB Created: 2021-04-14 05:13:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: f8536aa8ef1913c74a65fed05b7bfa8f SHA-1: 9558c33e756ade0b6faa9ba724102297d207e56f SHA-256: ee0a8fe2852b6ee0f2214b1e56751edd7ddfcba76a555d82ad3958b50003b572
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to link farms and disposable hosting, indicating a phishing or malware distribution 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 malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jacksth.ru/strik?utm_term=vampire+diaries+damon+quotes+funny PDF link annotation
    • https://gipavenox.weebly.com/uploads/1/3/5/9/135966662/8779013.pdfIn PDF document text
    • https://cdn.sqhk.co/rinezodoniga/gQBn9ig/war_robots_mod_apk_unlimited_gold.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369903/normal_603b6c099eb1b.pdfIn PDF document text
    • https://fowowudajij.weebly.com/uploads/1/3/5/3/135312379/5399711.pdfIn PDF document text
    • https://cdn.sqhk.co/zurefaxenov/foijgcD/wotuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369153/normal_6068f1bd1239b.pdfIn PDF document text
    • http://bawimip.sportsontheweb.net/kenny_werner_effortless_mastery_espaol.pdfIn PDF document text
    • http://narovomesizi.medianewsonline.com/what_is_the_difference_between_capitalism_and_socialism.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424935/normal_60172d020764e.pdfIn PDF document text
    • https://xapukuzikoki.weebly.com/uploads/1/3/4/3/134381416/8d06e75a07dbb7.pdfIn PDF document text
    • https://falosaxosudo.weebly.com/uploads/1/3/4/0/134017699/7700782.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446770/normal_5fc57576c39fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464869/normal_600fcffca3048.pdfIn PDF document text
    • http://kajejib.medianewsonline.com/deficincia_de_vitamina_a.pdfIn PDF document text
    • https://xatosupitoso.weebly.com/uploads/1/3/4/0/134018334/1da68c1d8789b69.pdfIn PDF document text
    • https://cdn.sqhk.co/luzigagoguna/giiOsX8/1419658573.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wutesejib.onlinewebshop.net/62719870933.pdfIn PDF document text
    • https://s3.amazonaws.com/gusule/how_to_do_qualitative_research_in_psychology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f43de2db-831c-48a2-9708-5dc2c64f6f19/tp-link_hs100_smart_plug_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09a09203-3bd0-4899-8e9c-2db32a54f997/15161782139.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/37183797689.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3903c582-ade1-420d-adc6-ec2a0e686cd9/fafedugipi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc98cb8c-6a8b-47a8-a095-a527d48d523b/what_is_the_best_metal_detector.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_off0000ecef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECEF 5348 bytes
SHA-256: 10c53f2e869f6cb99c406b16d05fe3b10be11cd791d0559bf7275900b83d6f1d
font_01_sfnt_off0000ff13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF13 11540 bytes
SHA-256: 2b3869885084afd04c323d1afc496f49f1ea7c11d13ed52469c6cef00d90e7fe

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