Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ba4c752b8596153…

MALICIOUS

PDF

76.0 KB Created: 2021-04-18 14:19:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b0ea6cc4c3063fbe9141c81556f6de6b SHA-1: 7f7bba1670bb64d8ea7c51c0f8b4cf1e1c215268 SHA-256: 9ba4c752b85961531c8e59290565475937de24804de7e1c7c2cb71c5899c04c8
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous external links, many pointing to disposable domains, suggesting a link farm designed to obscure malicious destinations. The presence of a 'download button' heuristic and ClamAV detection as 'Pdf.Phishing.Trojan' indicates a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and external links are indicative of a malicious workflow, likely involving the exploitation of a PDF vulnerability to execute a payload or redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ponafet.ru/strik?utm_term=royal+120dx+cash+register+manual PDF link annotation
    • http://chambre.xyz/tudubu56hpi.pdfIn PDF document text
    • https://rebigakudaj.weebly.com/uploads/1/3/1/3/131383708/3907098.pdfIn PDF document text
    • http://sitebomobegux.sportsontheweb.net/what_is_the_order_of_the_harry_potter_series_movies.pdfIn PDF document text
    • https://vunepixas.weebly.com/uploads/1/3/1/4/131483778/6958239.pdfIn PDF document text
    • http://biolinkus.me/xerosukoxarasowuniwizj10bf.pdfIn PDF document text
    • http://kadaxejob.mypressonline.com/introduction_to_mechanics_of_composite_materials.pdfIn PDF document text
    • http://rimiripa.mypressonline.com/ikea_catalogue_order_canada.pdfIn PDF document text
    • http://kobazugipodiv.medianewsonline.com/79837435718.pdfIn PDF document text
    • http://fesotisifofil.mygamesonline.org/whats_that_sad_tik_tok_song.pdfIn PDF document text
    • http://siwivelijutore.medianewsonline.com/atlas_de_hematologia_clinica_clinical_hematology_atlas.pdfIn PDF document text
    • http://bidizujimon.getenjoyment.net/ap_calculus_ab_notes.pdfIn PDF document text
    • http://wovugikanagak.scienceontheweb.net/telovanepejevumoxato.pdfIn PDF document text
    • http://fumuroruzej.medianewsonline.com/15842715782.pdfIn PDF document text
    • http://mavpa.fun/kamizovazaxopovafamejanumq9ov.pdfIn PDF document text
    • http://suzofovolavuk.scienceontheweb.net/11433652728.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/211daa3a-635a-4bc2-a447-e3589291b817/listening_skills_activities_for_preschool.pdfIn PDF document text
    • http://bidusibebawuz.onlinewebshop.net/early_learning_outcomes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd3251bd-1dce-40c2-97e8-567e56792aa4/maya_banks_kgi_series.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c42c2adb-b78c-4251-bb43-0820107e4ca5/wilton_leaf_tip_sizes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07555577-5780-48f1-84b7-236c88203b94/lapidenogajaga.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_off0000e659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE659 5856 bytes
SHA-256: 51d2779673d6b00560868feaf9e832a1055c0bde7e1534499e9491307b85f4dc
font_01_sfnt_off0000fa33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA33 11608 bytes
SHA-256: 8239407d46fb937df4bb51cb8826b1689a9b3d593bd5dea546ba61ea68ff28f5

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