Malicious PDF — malware analysis report

Static analysis result for SHA-256 0aa24ca455c5a709…

MALICIOUS

PDF

64.0 KB Created: 2020-11-25 09:22:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 35f268fe476849756915f882e75612e5 SHA-1: b062617622b3e52530eb6e2c5052393cd36d4f92 SHA-256: 0aa24ca455c5a709728ce17f84dada570569eecd65cb4b2f47237e0d30b58905
126 Risk Score

Malware Insights

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

The PDF contains multiple external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://trafficel.ru/strik?utm_term=a+celui+qui+sera+vainqueur+pdf PDF link annotation
    • https://mejebepagomuda.weebly.com/uploads/1/3/4/4/134494428/34467.pdfIn PDF document text
    • https://xagajanum.weebly.com/uploads/1/3/4/5/134599721/e4c406947.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477164/normal_5fa95b2ce7a40.pdfIn PDF document text
    • https://dojeviwenos.weebly.com/uploads/1/3/4/4/134491393/maxevinebejamuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384464/normal_5fad5f44356fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427514/normal_5fad6c4d8d56c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382423/normal_5f8c6b248b6d9.pdfIn PDF document text
    • https://kakulekatorud.weebly.com/uploads/1/3/4/6/134681497/rumerezud_tidagemu_fifedig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365586/normal_5f875cc9aff54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419637/normal_5fba3cf3eb4e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489583/normal_5fb41c9a27d32.pdfIn PDF document text
    • https://bogadisosupotaj.weebly.com/uploads/1/3/0/7/130776541/1495150.pdfIn PDF document text
    • https://rimofunoduw.weebly.com/uploads/1/3/4/5/134525219/metade.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/30df4198-4f19-4572-aaa2-b806680038fd/touch_me_spring_awakening_sheet_musi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f4ef07f-af23-4eca-9568-5cf5ad40e313/ikea_billy_cage.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_off0000bad4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAD4 5324 bytes
SHA-256: 0f60471eddd8e7dbdb9df40db9e4e561ec5b892465813a697d596f857d5aee60
font_01_sfnt_off0000cd08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD08 11412 bytes
SHA-256: 23d00efb92f1418940877c510857ea165f875bd17eea560c739609b5e68f6ffa

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