Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a4bcdabd9c206ae…

MALICIOUS

PDF

78.5 KB Created: 2021-04-16 10:05:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 5c35d5ab6db36d2c629a7a650af338fb SHA-1: bfe26b143d6133a12251d03b7c1d1c7230e5b6bc SHA-256: 2a4bcdabd9c206aec96503d39dedbf138cfbc6442e1e5f234abf4b10ee658902
126 Risk Score

Malware Insights

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

The PDF document contains an embedded URL that redirects to a suspicious domain, identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to trick users into navigating to a malicious site.

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://xezojetit.ru/strik?utm_term=how+to+turn+on+xfinity+cable+box+with+remote PDF link annotation
    • https://cdn.sqhk.co/vopunokapire/CBqhapM/n._o._v._a_legacy_apk_download_mod.pdfIn PDF document text
    • http://bred-enligne.com/how_to_show_that_oxygen_is_produced_during_photosynthesisbrg9v.pdfIn PDF document text
    • https://rokipidofavum.weebly.com/uploads/1/3/4/0/134042790/vafavinodobijonegot.pdfIn PDF document text
    • http://5-euro.info/68536978668i3r9k.pdfIn PDF document text
    • https://cdn.sqhk.co/marezotije/Fhagejj/petoxixitubaxutemevaxofi.pdfIn PDF document text
    • http://idealslimitalia-official.site/como_preparar_soluciones_buffer_en_el_laboratorion211d.pdfIn PDF document text
    • http://dusalawolut.iblogger.org/lajag.pdfIn PDF document text
    • https://cdn.sqhk.co/xakalodesi/O0bRmhb/ajax_send_form_data_json.pdfIn PDF document text
    • http://marketop.club/translate_chinese_camera_android13174.pdfIn PDF document text
    • https://rejukikigukaw.weebly.com/uploads/1/3/5/3/135387704/e1fa2.pdfIn PDF document text
    • http://shopeuro.pro/everstart_jump_starter_air_compressor_not_workingyw1tm.pdfIn PDF document text
    • https://gomafaned.weebly.com/uploads/1/3/5/2/135296522/mobew.pdfIn PDF document text
    • http://tidemelewofu.iblogger.org/putininijaximuxaborerek.pdfIn PDF document text
    • http://ketotreno.buzz/179557171070r50s.pdfIn PDF document text
    • https://cdn.sqhk.co/xavexapoxiv/eggThcZ/81350018930.pdfIn PDF document text
    • https://cdn.sqhk.co/vanewano/4gfihih/streamlabs_chatbot_setup.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/limewub/40322085212.pdfIn PDF document text
    • http://mafonoxerinomif.epizy.com/zebolekarisolejinanedo.pdfIn PDF document text
    • http://juvisupejigu.epizy.com/siluvokefoxugipefojuzatam.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/how_to_reset_weight_watchers_calculator.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_off0000f666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF666 5304 bytes
SHA-256: 58213e33e99e9258bbcd469429508248743f0a562e83b517dae32a8e3bb910b1
font_01_sfnt_off00010864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10864 10656 bytes
SHA-256: 740b71d131eaef3db8dcf3ef1ac2bb5062c529215243ad27542b448117193346

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