Malicious PDF — malware analysis report

Static analysis result for SHA-256 96d3401bbe39a732…

MALICIOUS

PDF

85.2 KB Created: 2021-04-07 00:05:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8b0fc1e9ed99447f256572a3ba9cc261 SHA-1: 113e947aa24c3696230ff41c8d85bf312f4674c6 SHA-256: 96d3401bbe39a732c2b91255244bfe51cc361611bd4d6eb46459c6a70c2c2534
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://resalured.ru/strik?utm_term=dewalt+dw703+compound+miter+saw+manual PDF link annotation
    • https://cdn.sqhk.co/satukevaguka/icMjewl/cut_the_rope_hd_free_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405660/normal_6002625bbb188.pdfIn PDF document text
    • http://ninuxalezopo.getenjoyment.net/71467663106.pdfIn PDF document text
    • http://lorakuze.sportsontheweb.net/psychodynamic_therapy_for_depression.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420470/normal_60611769a2545.pdfIn PDF document text
    • http://vogolimipogusoz.mypressonline.com/a_level_sociology_notes_on_education.pdfIn PDF document text
    • http://mojadejazisapa.sportsontheweb.net/lord_of_the_flies_piggy_name_meaning.pdfIn PDF document text
    • http://fuvisetitisenon.mypressonline.com/bhagavad_gita_in_sanskrit_with_tamil_translation.pdfIn PDF document text
    • http://buxewufa.iblogger.org/how_to_volunteer_for_red_cross_kenya.pdfIn PDF document text
    • https://cdn.sqhk.co/nalujujoso/9jgWibt/31498238834.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388432/normal_6053161d369b7.pdfIn PDF document text
    • http://xapidomin.mywebcommunity.org/zijuwikanubi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489969/normal_606cb3ba1257f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gisebebego.rf.gd/vetudeveseravowaniburupeb.pdfIn PDF document text
    • http://foxadawimuwewar.epizy.com/furnace_filter_reviews_consumer_reports.pdfIn PDF document text
    • http://latisikonif.epizy.com/fifelisipidaf.pdfIn PDF document text
    • http://fenigubigona.epizy.com/zidebutazuvatirazokubimu.pdfIn PDF document text
    • http://segurixuzek.myartsonline.com/82740076845.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_off00010975.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10975 5696 bytes
SHA-256: 30ab8d8639100efda1ce94b339f5ff8e75716d30490e22389dd71782317629f1
font_01_sfnt_off00011ce5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE5 12796 bytes
SHA-256: 3e9dd8f3a22df518cb60ab632405cff376935206d775ffd39fbacbfed82d42d9