Malicious PDF — malware analysis report

Static analysis result for SHA-256 9de20b889b1e03b5…

MALICIOUS

PDF

80.1 KB Created: 2021-04-04 21:03:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0815761cbe97cbc36bb50b4aa7c3600a SHA-1: d9d0c02b6657236a509829f40115a867965e782c SHA-256: 9de20b889b1e03b5e67e7ec1bcc71efcbbf8d7b6eda1839165ef82d8f4fc8672
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm designed for SEO manipulation and potentially phishing. The primary malicious URL, https://botokaw.ru/strik?utm_term=craftsman+worm+drive+circular+saw+parts, is presented as a lure. While no scripts were directly extracted, the PDF structure and the presence of external links strongly suggest an attempt to redirect users to malicious sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://botokaw.ru/strik?utm_term=craftsman+worm+drive+circular+saw+parts PDF link annotation
    • https://s3.amazonaws.com/webipejonavuv/apa_style_format_citation_machine.pdfIn PDF document text
    • https://fuwofinirofen.weebly.com/uploads/1/3/1/6/131637723/selonakijexogu.pdfIn PDF document text
    • https://pisukobuvasojab.weebly.com/uploads/1/3/4/3/134398412/liviviliwikuwokapan.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/players_handbook_dungeons_and_dragons_5th_edition.pdfIn PDF document text
    • http://fishland.store/musagogarur1stix.pdfIn PDF document text
    • http://insurancecarusa.com/738305882374pjz5.pdfIn PDF document text
    • http://opsnatur.fun/metro_rail_map_los_angelesa6b41.pdfIn PDF document text
    • http://xanusojuruxu.sportsontheweb.net/hdfc_life_opportunity_fund.pdfIn PDF document text
    • http://davebamonuzove.medianewsonline.com/vizimewusidij.pdfIn PDF document text
    • http://bumasujofoj.getenjoyment.net/ansys_workbench_13_static_structural_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/datalinidozivib.pdfIn PDF document text
    • https://s3.amazonaws.com/sobaketemu/lisesazedogunaxifowexuz.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/sophos_authentication_client_android.pdfIn PDF document text
    • http://netewe9.xyz/gelinixefofiwoymno0.pdfIn PDF document text
    • http://magnifioco.site/19521704575vgqai.pdfIn PDF document text
    • https://xatawozenovug.weebly.com/uploads/1/3/4/8/134886035/bovozefivof.pdfIn PDF document text
    • http://vowuzemiru.medianewsonline.com/69602726392.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b8f7bc2e-5f90-466c-a76c-b8215bfdb3ae.filesusr.com/ugd/9717d9_3d1e794633d141658a94ef60a1cb2761.pdf?index=trueIn PDF document text
    • https://050a9d39-d8a1-4107-8be8-b2b70b72e454.filesusr.com/ugd/5262df_b0e2a2dc4ab4431a8fcf141d89dcd24f.pdf?index=trueIn PDF document text
    • https://92923600-264c-4cb8-9d87-181083d4f0d6.filesusr.com/ugd/0bf43f_8c0bfa374e5145139ef66f2d67673fa4.pdf?index=trueIn PDF document text
    • https://7fca5364-97a1-4441-b76e-d2c429a59218.filesusr.com/ugd/735424_1de9178b4cb941c18d8981272b20aa59.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_off0000fc16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC16 5360 bytes
SHA-256: ffa1031884bc24f1c459846661dcdd88652788d5eb96ac494dcc1ae25b2e2c05
font_01_sfnt_off00010e4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E4E 10260 bytes
SHA-256: 6627f1ba8b28e1dd6087d827d812f6262a1772bc7272b8b3528d143e34e1f6db