Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc41263bac3a5539…

MALICIOUS

PDF

64.0 KB Created: 2021-02-28 00:19:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 30ce407100bfe6c3e97a642cdb7a5d4a SHA-1: 2428b8f67a42433ebc39825f0a63a9257b2f5468 SHA-256: bc41263bac3a55394740dc3f0018080d6716980dd64fa67dc2465319f5d09d4a
182 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links pointing to suspicious domains, many of which are flagged as malicious redirectors or hosted on disposable infrastructure. 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 links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9722

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://crophysi.ru/award?keyword=how+to+cook+waffle+maker In PDF document text
    • https://cdn.sqhk.co/vilubofi/i7whdij/bumosol.pdfIn PDF document text
    • https://cdn.sqhk.co/zimuteraf/hbVFlje/jirigawinirep.pdfIn PDF document text
    • http://bawagel.22web.org/quantitative_versus_qualitative_research_in_nursing.pdfIn PDF document text
    • https://cdn.sqhk.co/danajuva/hdjjlgj/wwe_undertaker_news_update.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367287/normal_5fe534f4e257b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459479/normal_5ff1aeb6b3782.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422637/normal_601d3081cc5e8.pdfIn PDF document text
    • https://cdn.sqhk.co/nawakema/jaLYpha/goladosukogefavisuvogefo.pdfIn PDF document text
    • https://cdn.sqhk.co/fupipevu/QqheEhi/28327372773.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414691/normal_60088953f22b7.pdfIn PDF document text
    • http://tuzudidoxofusi.22web.org/15545836385.pdfIn PDF document text
    • https://cdn.sqhk.co/gukomoluda/jbq2nic/38829435414.pdfIn PDF document text
    • https://cdn.sqhk.co/fekerepusa/ghniOz7/mix_color_full_hd_wallpaper_download.pdfIn PDF document text
    • https://cdn.sqhk.co/ketifoseja/hd9hb2O/bidowiseluxaxirisonuz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fomupobidep.epizy.com/limalidimajapilolexadiju.pdfIn PDF document text
    • http://tefesapebeto.rf.gd/washington_state_unemployment_calculator.pdfIn PDF document text
    • http://tefabawamibane.epizy.com/adobe_photoshop_cs2_setup_file.pdfIn PDF document text
    • http://fakozavovenabe.rf.gd/razukelibu.pdfIn PDF document text
    • http://bogetozepopizir.rf.gd/67704542731.pdfIn PDF document text
    • http://zilamefuwata.rf.gd/java_swing_form_layout_example.pdfIn PDF document text
    • http://vidabovon.epizy.com/74774814790.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAB 4968 bytes
SHA-256: 5d4881b3fd0b93560dc340695e78697723efa928c62936e5c5485df443a97b03

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