Malicious PDF — malware analysis report

Static analysis result for SHA-256 72566bb5bad48498…

MALICIOUS

PDF

79.3 KB Created: 2021-03-09 21:05:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 6890cd19365a00fdcdf1235c1b4869cc SHA-1: 5375a71d7c33ab43e6a1612baede21070bd8261a SHA-256: 72566bb5bad48498c65bb8ca702c15ead38b9473b84df925cb2fc64a0e720fd7
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristics point towards the use of JavaScript for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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://vilenefex.ru/123?utm_term=dagannoth+kings+guide+rs3 PDF link annotation
    • https://gimipozadifan.weebly.com/uploads/1/3/1/3/131380487/vojutaxomepube.pdfIn PDF document text
    • http://allostar.buzz/65989959502fazi8.pdfIn PDF document text
    • https://gozawufi.weebly.com/uploads/1/3/1/3/131398332/e396886bcefb39.pdfIn PDF document text
    • http://nibewubixela.getenjoyment.net/8th_edition_kill_team_rules.pdfIn PDF document text
    • https://rikatawifusozib.weebly.com/uploads/1/3/1/4/131409861/9687260.pdfIn PDF document text
    • https://xebuzoxovekig.weebly.com/uploads/1/3/4/0/134018553/668dcdcdc72a69.pdfIn PDF document text
    • https://nubapatis.weebly.com/uploads/1/3/4/0/134095887/mejuvuzutone.pdfIn PDF document text
    • http://english-10.site/zifolunarzphf.pdfIn PDF document text
    • http://mmmmmme.space/321301261169yurv.pdfIn PDF document text
    • http://businesslinecenter.com/zitomalivelijekewegezu1q3mq.pdfIn PDF document text
    • https://lotaximadezepa.weebly.com/uploads/1/3/1/3/131379514/kumimog-mujulinape-kolusatupume.pdfIn PDF document text
    • http://leree4.club/232312360030bb1x.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/2b27b750-3850-4d64-95e2-10ae10c08f86/roomba_980_battery_charge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbba65f5-9c0a-4197-a872-68545da815b7/stopping_by_woods_on_a_snowy_evening_appreciation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4509a055-7649-4a28-bdf2-ce6307042c2e/64439188589.pdfIn PDF document text
    • http://fijorolur.myartsonline.com/95878246400.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/733d9980-8ba4-4fd1-a8c6-6d15a66e780b/how_to_program_vizio_remote_to_charter_cable_box.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_off0000f950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF950 5284 bytes
SHA-256: 8c12d6b898285a20839db4416ebd623fa88640bee52bcbb0ea6b5deddc2e4598
font_01_sfnt_off00010b47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B47 10884 bytes
SHA-256: b9984a3c54baca7748605e2d178d37c8e965407593003c75f0b3b277bb19cf80

Open this report in the interactive analyzer, or submit your own file for analysis.