Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7c342c88f7c6a4b…

MALICIOUS

PDF

76.3 KB Created: 2021-03-24 19:42:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: bda8483867c9234ec7479763014a8058 SHA-1: aed557d2d2b93231993673a35e3b9e30173e6e90 SHA-256: b7c342c88f7c6a4b281920df002da853b14327a3064a828552f6eb406e9a5199
74 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, with one specifically flagged as a potential malicious redirect. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, suggesting a phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=what+are+the+basic+universal+human+rights PDF link annotation
    • http://zuwitirub.iblogger.org/fonixoxanenirap.pdfIn PDF document text
    • http://biluber.22web.org/lesegisuduwelajimupovapo.pdfIn PDF document text
    • http://pifesato.iblogger.org/pafapebasexesa.pdfIn PDF document text
    • https://cdn.sqhk.co/luzorisu/CGX7haX/38456227413.pdfIn PDF document text
    • http://tujugebisuxilun.22web.org/65405709685.pdfIn PDF document text
    • https://cdn.sqhk.co/juvanejejuwo/gSjciff/38666346603.pdfIn PDF document text
    • https://gonewama.weebly.com/uploads/1/3/4/0/134095907/jutagagovap_bipeza.pdfIn PDF document text
    • https://timodidub.weebly.com/uploads/1/3/1/3/131379596/2415592.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vakewexapenox.epizy.com/72801683436.pdfIn PDF document text
    • http://sugugaxo.rf.gd/thank_you_letter_after_internship.pdfIn PDF document text
    • http://serinuzosazojup.epizy.com/image_denoising_using_wavelet_transform_matlab_code.pdfIn PDF document text
    • http://dobejevilorizu.epizy.com/72837385141.pdfIn PDF document text
    • http://rixuzomobe.epizy.com/sutugukuzixuresapusakavup.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/class_10_political_science_chapter_1_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/gonasidupij/pawimodajagot.pdfIn PDF document text
    • https://s3.amazonaws.com/sedowedi/alphabet_chart_kindergarten.pdfIn PDF document text
    • http://dogurof.epizy.com/lewajunadelixof.pdfIn PDF document text
    • http://zekubegem.epizy.com/8_dimensions_of_wellness_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/vovivuxo.pdfIn PDF document text
    • http://garufazubet.epizy.com/graphing_equations_worksheet.pdfIn PDF document text
    • http://rerodijunenema.epizy.com/payment_receipt_template_html_css.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_off0000ecff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECFF 5428 bytes
SHA-256: b1756cdd82ed8ed63203f3607f5338d98687fcc7c4fbccfb4691f6d6c60d7e04
font_01_sfnt_off0000ff58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF58 10760 bytes
SHA-256: 44522f9a184ebc5654070820f0940bed32908428d71c579ddce24d37b41df6e2

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