Malicious PDF — malware analysis report

Static analysis result for SHA-256 524a8b83df90d4fd…

MALICIOUS

PDF

73.4 KB Created: 2021-03-23 20:40:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: d12cb2025f48ca6185e68200f0755e67 SHA-1: 21b553332eaa98ac0e1804f58d04f4cf926eacaa SHA-256: 524a8b83df90d4fd1d75eaa1d13245a001a929f9eff2c71b057cc9f66709fdc6
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded URLs and the document's structure indicate an attempt to redirect users to potentially malicious content, likely for phishing or scam purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/strik?utm_term=how+do+you+program+directv+remote+to+tv PDF link annotation
    • http://cosmicgig.com/52723953794hzmu4.pdfIn PDF document text
    • http://vbruti.site/cbse_class_6_mensuration_worksheetsda3t4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479441/normal_5fea35752e654.pdfIn PDF document text
    • https://nipoxumafoji.weebly.com/uploads/1/3/4/7/134717148/64c435dc.pdfIn PDF document text
    • https://digexuvin.weebly.com/uploads/1/3/2/8/132814990/2188943.pdfIn PDF document text
    • https://karimimeri.weebly.com/uploads/1/3/1/1/131164281/dirap_wavisaluseveniz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452382/normal_60234d90368e4.pdfIn PDF document text
    • https://vijekufimukij.weebly.com/uploads/1/3/0/9/130969895/disufawasokijaw.pdfIn PDF document text
    • https://simavaxefawok.weebly.com/uploads/1/3/4/6/134666246/2375561.pdfIn PDF document text
    • http://deutschebank-meine.com/lededagajelaw24u8b.pdfIn PDF document text
    • https://dumopodowejuna.weebly.com/uploads/1/3/4/5/134591879/subomar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491151/normal_6044a01e254ed.pdfIn PDF document text
    • https://vizazifikoj.weebly.com/uploads/1/3/5/3/135327449/d53154e86a8dc8.pdfIn PDF document text
    • https://wawowipibi.weebly.com/uploads/1/3/3/9/133997364/9976670.pdfIn PDF document text
    • https://kisuwirabavaruz.weebly.com/uploads/1/3/3/9/133999170/jebirudot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487927/normal_60516088bbf05.pdfIn PDF document text
    • https://razamilijukiw.weebly.com/uploads/1/3/4/8/134879964/gitolamepiz_namakuwinasof_kibukoju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468551/normal_602a5021d42f7.pdfIn PDF document text
    • http://opendouche.xyz/how_to_draw_a_human_face_step_by_step_easyea84x.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/64352d14-0ae2-4a3d-ba05-6fce213eb2ae/jutuwepadino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89b9db2b-a90a-4ab5-9802-b8a6859411f9/55226473310.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cd8e722-e52a-4d51-94bc-26819029aac5/90717772260.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73b7dd47-e88b-4e41-8022-a0e682b8272c/miwotopejud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbba2db1-dadf-4f18-8e2e-f006108743d9/itil_v3_certified_professional.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fed035c9-d824-4f4a-8a65-b97614684d35/a_gentle_introduction_to_ros.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ebd9939-d638-4424-8445-11ccd8fe2917/xegusog.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_off0000e30d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE30D 5400 bytes
SHA-256: 8316eb42cc15f7a707a007bc4d420c0061325bef7fc80dff52d60c0d261dbf01
font_01_sfnt_off0000f570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF570 10052 bytes
SHA-256: 161b92b1e36d7bfada8d1b3daf875102eb5b51614ffe3e400eea0128a9564760

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