Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecaa3727f2ecf3be…

MALICIOUS

PDF

66.6 KB Created: 2020-12-08 06:36:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: b5615e85db625f3e75dda554ee7a49f7 SHA-1: 1772745926d3af56568c8c293e30093c7e2a6535 SHA-256: ecaa3727f2ecf3bea25f126a425b85477b39573fbce93ffcc00ee5cb3becaa6f
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to known malicious redirectors or link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of embedded URLs and the heuristic firings suggest this PDF is designed to lure users to malicious websites.

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
  • 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 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.
  • 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://traffking.ru/strik?utm_term=best+monk+race+horde In PDF document text
    • https://mimitokiwunas.weebly.com/uploads/1/3/4/0/134012498/xarufimagizo.pdfIn PDF document text
    • https://degezumibupupek.weebly.com/uploads/1/3/4/8/134862322/neximasis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444123/normal_5fb26443a8948.pdfIn PDF document text
    • https://vonenefanor.weebly.com/uploads/1/3/4/6/134638091/2750468.pdfIn PDF document text
    • https://wabebapag.weebly.com/uploads/1/3/4/3/134335427/sofupabi.pdfIn PDF document text
    • https://xalogajufuzuk.weebly.com/uploads/1/3/4/8/134885017/jutaluratujagigam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380379/normal_5f9754accd91b.pdfIn PDF document text
    • https://vatedubajepe.weebly.com/uploads/1/3/4/3/134371970/7eb6f025.pdfIn PDF document text
    • https://jebunofom.weebly.com/uploads/1/3/4/4/134468214/jujuberizise_joxofofufoviwe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/ansible_to_local.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc07dde27a199023ab34438/t/5fc3431a61e25426e1a146f1/1606632220969/44403075278.pdfIn PDF document text
    • https://s3.amazonaws.com/pukiza/photography_competition_poster_template.pdfIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/40309594574.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/kite_runner_foil_characters.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1559bc6d9645836252c59/t/5fc31ef85147b14804998dd2/1606622969402/carrera_digital_132_nascar.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_off0000c6ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6BA 5260 bytes
SHA-256: ef95ffb639115537e367f7fb5083c96da70f8439eed4bafb2ac739901c70cded
font_01_sfnt_off0000d86b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD86B 11124 bytes
SHA-256: 94b8b5d82cc11af2fa3fe6b95aa021ad8502104c34e4e411465a18c2f8ed381c

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