Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d4c0f431bc219af…

MALICIOUS

PDF

66.9 KB Created: 2021-03-03 06:45:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 9348dfa8738c779005d870354eadb7f7 SHA-1: b7993a6de0f1ccfd214b9b2d58673782ad16cd82 SHA-256: 1d4c0f431bc219aff1a60402d7dab93c32fc12ff538efe8b72da971406c0e5a4
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a phishing lure or a downloader for a second-stage payload.

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://botokaw.ru/wix?keyword=el+dorado+springs+r+2+school PDF link annotation
    • http://teenagetutor.online/zopasidonanebitifexodiw7xwmj.pdfIn PDF document text
    • http://vatidenow.medianewsonline.com/bifezumororegesilizevedel.pdfIn PDF document text
    • http://sopugepibimel.mypressonline.com/2006_bmw_330i_valve_cover_torque_specs.pdfIn PDF document text
    • http://siviveko.getenjoyment.net/tawun.pdfIn PDF document text
    • http://pressit.space/povoponixuxewarivo31rh.pdfIn PDF document text
    • http://swiss-family.space/fiwuxasizuulwt0.pdfIn PDF document text
    • http://dizititakozazi.mywebcommunity.org/sword_art_online_alicization_war_of_underworld_all_characters.pdfIn PDF document text
    • http://lovelid.xyz/adzan_merdu_gratisdn8tf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/73890046325.pdfIn PDF document text
    • http://genuxapadaxasax.epizy.com/how_to_write_an_opinion_piece_high_school.pdfIn PDF document text
    • http://jumepenitujox.atwebpages.com/millennium_g2_trigger_pull_weight.pdfIn PDF document text
    • http://pejefovad.epizy.com/we_cordially_invite_you_template.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/zudipitadafowijogumifema.pdfIn PDF document text
    • http://rawigukegopafot.onlinewebshop.net/jixetobamimunit.pdfIn PDF document text
    • http://tasopawak.rf.gd/oleanna_play_monologue.pdfIn PDF document text
    • http://sinusisokopex.atwebpages.com/xefilojunijakokipuvidatof.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_off0000caa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAA6 5424 bytes
SHA-256: 9109c8aa56193467c84c2e08bcc2cf1e7baeb85a0de7ac2ce377dce62efe7d79
font_01_sfnt_off0000dd15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD15 9812 bytes
SHA-256: 2f8fd41787dd4fafeb0f6382a9e1be30f8202e0e0950479e4760085dd453f365

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