Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0d92150e2582f8e…

MALICIOUS

PDF

77.4 KB Created: 2021-03-11 09:11:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b7f60b3a34d5159e44f17bba4edd2349 SHA-1: 1689d039d8be6f978c0951209633a012b57b886a SHA-256: b0d92150e2582f8e99f2881caf360e732c384cb19463ce5a37a2ac336330254f
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious 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://pelibifir.ru/123?utm_term=form+of+nucleon+nucleon+potential PDF link annotation
    • http://kovajexikimodu.iblogger.org/kigotapilex.pdfIn PDF document text
    • http://dreamingdeveloper.com/zifavapepee8toc.pdfIn PDF document text
    • http://muwiduvepobuz.mygamesonline.org/zusapowozofupigunuguw.pdfIn PDF document text
    • http://wazowil.22web.org/42792573814.pdfIn PDF document text
    • http://serikanipesemo.iblogger.org/gegovoterusiwelusoxa.pdfIn PDF document text
    • http://zujewubowufonug.scienceontheweb.net/mutedexonoferozazuxegi.pdfIn PDF document text
    • http://hookup755.fun/39000011220e9g66.pdfIn PDF document text
    • http://lobabinuladeri.medianewsonline.com/lg_air_conditioner_error_code_ch_10.pdfIn PDF document text
    • http://tejasatobes.medianewsonline.com/should_high_school_degree_be_capitalized.pdfIn PDF document text
    • http://rekugegik.scienceontheweb.net/xezivorapobidebomolemita.pdfIn PDF document text
    • http://bahis-sikayet.com/2069091372pb3wg.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/7b68caa2-395c-4549-adde-96bb0e41eba5/19705060418.pdfIn PDF document text
    • http://pofiwun.rf.gd/consulting_company_logo_templates.pdfIn PDF document text
    • https://29bb9f0a-cb36-4278-8b1c-05d86a2267e4.filesusr.com/ugd/25e746_e2149485e6c0416c898aa9f045916a3f.pdf?index=trueIn PDF document text
    • https://fb7bf4c5-056f-4058-a7d1-073478569b53.filesusr.com/ugd/d90490_c0589bfca9bc47a68124a7e1e17fee50.pdf?index=trueIn PDF document text
    • https://8d2868a3-57b7-484c-81f6-493c1c4f5daa.filesusr.com/ugd/a8ca0f_5c9e7256e0704a608d02fb02495fd1ae.pdf?index=trueIn PDF document text
    • https://fb413987-6e77-4bf1-aaa6-e97eb550fbee.filesusr.com/ugd/108936_e44a992bdfde4832a4ea807fbb2cdf1d.pdf?index=trueIn PDF document text
    • http://ninanupazazudad.rf.gd/12th_mark_sheet_download_2020.pdfIn PDF document text
    • https://86908e24-11f3-43a1-9346-bf531f45ee0b.filesusr.com/ugd/97493d_bf94904085044a00b5ff83c05252f4cf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/483d31bb-edbe-411c-9f03-30ba6c3f44b1/47297250962.pdfIn PDF document text
    • http://vafukibugaf.epizy.com/folder_from_s3_bucket_boto3.pdfIn PDF document text
    • http://pejenusiloxo.rf.gd/railcard_application_form_16-_25.pdfIn PDF document text
    • http://sekizipax.rf.gd/newuzokur.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_off0000f218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF218 4936 bytes
SHA-256: 2d0e50438830b70252d832de3b350b5366f605668a6393c9671165db9b3fc951
font_01_sfnt_off000102d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D6 10992 bytes
SHA-256: 337a21309335c353d4383c76d1e4745a8b3c93ba0bd7f87aed3656245a4f0abf