Malicious PDF — malware analysis report

Static analysis result for SHA-256 3204e9544d433413…

MALICIOUS

PDF

78.1 KB Created: 2021-02-06 04:40:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: aca1a202e566f41c7978afab238c5f4f SHA-1: d33d688177f68145781770839572fecc8be1791d SHA-256: 3204e9544d433413b04c532126b1250e83dba68de9da1de4ebd38cb33f044585
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs pointing to suspicious domains, flagged by heuristics as malicious redirectors and link farms on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were extracted, the embedded links are the primary attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/123?utm_term=la+lengua+y+los+hablantes+raul+avila+libro+pdf In PDF document text
    • http://zdorovie-vashe-vse.xyz/81051840837e0di4.pdfIn PDF document text
    • http://mmeueue.space/zezajaraladuvedobugo1o1w4.pdfIn PDF document text
    • http://ashotik.space/xomapopujess545.pdfIn PDF document text
    • http://50offshop.info/51446898404mz9q7.pdfIn PDF document text
    • http://liketime.fun/mesoamerica_y_aridoamerica_y_oasisamericakjmxz.pdfIn PDF document text
    • http://serdyukov.pro/89802389050bam9o.pdfIn PDF document text
    • http://whitetwo.space/como_estirar_infraespinoso752so.pdfIn PDF document text
    • http://afracheat6.xyz/grants_atlas_of_anatomy_15th_editionx12ml.pdfIn PDF document text
    • http://stassikorskyi.com/betking_old_mobiley5pvw.pdfIn PDF document text
    • http://natlegend.space/sulexaminitasodoz0hwnx.pdfIn PDF document text
    • http://onlinetyz.xyz/tajosariviwet0o40n.pdfIn PDF document text
    • http://klossheff.xyz/gumebibosuzasapibuxanobonteq4.pdfIn PDF document text
    • http://organic-ita.space/8d_problem_solving_example0ilgo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tatetutigu.rf.gd/airline_manager_android_game.pdfIn PDF document text
    • http://xadeboni.epizy.com/ridurovezaxol.pdfIn PDF document text
    • http://gabozimipuz.epizy.com/contract_management_excel_spreadsheet_templates.pdfIn PDF document text
    • http://raxusitusumulag.rf.gd/i_am_the_lorax_meme_template.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C8 5548 bytes
SHA-256: fbff63fbd9060055ed5511788500f74a87a104d177b83b4bd8a62f9d4ef1d8d2
font_01_sfnt_off000104a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A9 11288 bytes
SHA-256: e6db7a2e5cf932b87739a6c78a1347500fba9bf9efedfa139e37dd7b0cd50dd5

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