Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c94a53acc5b5056…

MALICIOUS

PDF

81.1 KB Created: 2021-03-14 10:56:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 029160d62c087cefaebdf26eadf87ed3 SHA-1: 77d46a59cdf13d8248a1591b60857876d016d6c8 SHA-256: 4c94a53acc5b5056f94d06d956cad883c01f274dc81e0b782435d7f086739a8b
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique often used for SEO manipulation or to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://golowaki.ru/wix?keyword=how+cases+reach+the+supreme+court+worksheet+answers PDF link annotation
    • https://zikegebuner.weebly.com/uploads/1/3/4/8/134856814/jeperixoluwu-selito.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413458/normal_603630135c2f9.pdfIn PDF document text
    • https://lexobazotukagof.weebly.com/uploads/1/3/1/4/131407042/roporomumewuro_balazubulukub.pdfIn PDF document text
    • http://hookup754.fun/gmail._com_freed7d16.pdfIn PDF document text
    • https://lumewogomor.weebly.com/uploads/1/3/4/3/134319436/77168675.pdfIn PDF document text
    • https://lovebaxubifutu.weebly.com/uploads/1/3/4/3/134322000/82a4571267.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404107/normal_5fd1f662ed98b.pdfIn PDF document text
    • http://bettermoneytips.com/bepubirawuwexirinoxukuw98hwx.pdfIn PDF document text
    • https://tigidejuremu.weebly.com/uploads/1/3/4/5/134502839/97800d7.pdfIn PDF document text
    • https://kegegizexuf.weebly.com/uploads/1/3/4/0/134042356/lilaselamub.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448724/normal_5fff283c2bbf2.pdfIn PDF document text
    • https://newavutija.weebly.com/uploads/1/3/1/8/131871734/fanogawolofoxuvav.pdfIn PDF document text
    • http://varietystore.website/how_do_i_improve_my_mobile_signal_at_homem8jkk.pdfIn PDF document text
    • http://f1l3download.site/67566597796ubbiu.pdfIn PDF document text
    • http://wssummer.space/92523360187t666f.pdfIn PDF document text
    • http://neyroskakalka.site/zilisojexiwumonikufizozyhl8r.pdfIn PDF document text
    • http://redtea.space/maths_genie_bounds_worksheetcy9x3.pdfIn PDF document text
    • http://game-pro.xyz/balancing_equations_and_simple_stoichiometry5i0f3.pdfIn PDF document text
    • http://futup.ru/cen-_tech_battery_charger_63043_manual2t1dm.pdfIn PDF document text
    • https://xubebedi.weebly.com/uploads/1/3/0/7/130776367/46e5825906.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1423d76f-a56f-4481-bf87-726e17039346.filesusr.com/ugd/14aee2_332cdc71c4d5472fa7b57a872303acbf.pdf?index=trueIn PDF document text
    • https://15319a82-8c66-4906-b3c2-464277991f2b.filesusr.com/ugd/070acf_1a18c5dafbf84f09a45413115ce722f5.pdf?index=trueIn PDF document text
    • https://d71fc03c-aea6-48f7-a990-8afffb22108d.filesusr.com/ugd/3de8a6_d6ca5c4986dd4cfab7613672082ea7db.pdf?index=trueIn 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_off0001007c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007C 5256 bytes
SHA-256: 2050bb156f481caecd71e32f9be62c5d9d8c5c2c0a0e1c221fc7d5ed8e0b947a
font_01_sfnt_off00011242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11242 10700 bytes
SHA-256: 28a93061953dd298bf22dc20bfb0ea6256d300b82dbbc87345c9e045fd246a87