Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c0defc43c889b8f…

MALICIOUS

PDF

59.0 KB Created: 2020-12-15 18:33:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: e255a40cea6bb8bc9d991211f5648e0f SHA-1: adf7db67f149f8676e5da5c4b3483f88d06f2415 SHA-256: 9c0defc43c889b8f6e79adfdfdf5b0561880eb6e75eb7d0acd2f31018b591b58
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded links, one of which points to known malicious redirector infrastructure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and ML_NYX_PDF_MALICIOUS strongly indicate malicious intent. While no scripts were extracted, the presence of malicious links suggests the document is designed to redirect users to phishing or malware-hosting sites, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://cctraff.ru/123?utm_term=sae+fatigue+design+handbook+pdf In PDF document text
    • https://jasasenud.weebly.com/uploads/1/3/4/1/134131975/256190.pdfIn PDF document text
    • https://jobekivisa.weebly.com/uploads/1/3/4/5/134584889/1464954.pdfIn PDF document text
    • https://polipofixino.weebly.com/uploads/1/3/4/5/134598506/4f816.pdfIn PDF document text
    • https://lokixesope.weebly.com/uploads/1/3/1/6/131607163/297575d1178.pdfIn PDF document text
    • https://gabegolixen.weebly.com/uploads/1/3/4/3/134368455/8705662.pdfIn PDF document text
    • https://nibuxapevu.weebly.com/uploads/1/3/4/6/134601724/63c1b1194.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc4eddadf132613bbd766a4/t/5fc5166c9ee0f32b87f5241c/1606751853322/shear_flow_closed_section_example.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3799d60f2895dc1f82192/t/5fc459fdfa04221c71aaa880/1606703613770/geviviwilav.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/simplification_and_approximation_for_ibps_rrb.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2cb63bf71053ccb1c5e2b/t/5fc881c1d32d012678fc035f/1606975943372/tabifarufezubibefejakarit.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10751bdb33045eec30316/t/5fc7fd070a30d12980fa24a8/1606941959722/wordpress._org_admin_login_page.pdfIn PDF document text
    • https://s3.amazonaws.com/wogikokuzotaxa/vehicle_checklist_forms.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdfc61a97599144ebda172/1606286437065/pebusefarozefeb.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd1ad861a76734b5ab32aa/1606228698117/madosikobijagen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/129b73a2-204d-4640-ab06-7cab05d024bf/68822391099.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ac2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC2E 5480 bytes
SHA-256: 95c38499d558888ef30e99fa106615e5e9e5543a35e53ba1823ab99f6543bb5d
font_01_sfnt_off0000bed0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBED0 9420 bytes
SHA-256: c490724c1a0899e8ec7588bd4cf6e27b8be3400a71bd8434627d4f2f37e2a658

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