Malicious PDF — malware analysis report

Static analysis result for SHA-256 5be888751857967f…

MALICIOUS

PDF

80.5 KB Created: 2021-03-18 21:10:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b651e5ae16d25e2fe49a107fbf44be53 SHA-1: 91e89ea8357ee38d47ac908bce3e33aa301b50de SHA-256: 5be888751857967f6efef9364e6901125ca51809f5555bfa3d9a09c4534bc4e5
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The primary purpose appears to be directing users to external URLs, potentially for phishing or malware distribution.

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://jumiwimov.ru/strik?utm_term=how+does+an+electric+choke+work PDF link annotation
    • https://lidafeli.weebly.com/uploads/1/3/4/6/134683499/2104497.pdfIn PDF document text
    • https://tabetigilazewa.weebly.com/uploads/1/3/5/3/135392987/0f5e5ff232fc9.pdfIn PDF document text
    • https://cdn.sqhk.co/vigeroti/lTRS3ic/50560122710.pdfIn PDF document text
    • https://zugufanebuloko.weebly.com/uploads/1/3/4/0/134016669/6616924.pdfIn PDF document text
    • https://cdn.sqhk.co/jegisizozul/nLjbgiM/jitiwojuf.pdfIn PDF document text
    • https://tirugisig.weebly.com/uploads/1/3/0/7/130738706/1150097.pdfIn PDF document text
    • https://lepudumewo.weebly.com/uploads/1/3/5/9/135962044/ab69e.pdfIn PDF document text
    • https://dodimugu.weebly.com/uploads/1/3/4/4/134483739/tafina.pdfIn PDF document text
    • https://kunisalopug.weebly.com/uploads/1/3/4/3/134315348/vutago-jajuxunodomopa-kitepuvesu.pdfIn PDF document text
    • https://miwujiloj.weebly.com/uploads/1/3/4/3/134333625/98aa8665a.pdfIn PDF document text
    • https://cdn.sqhk.co/karapazepot/Kskgdid/19490355701.pdfIn PDF document text
    • https://cdn.sqhk.co/pibepufas/Vggeute/cinelli_hobootleg_geo_size_guide.pdfIn PDF document text
    • https://mujunuduxur.weebly.com/uploads/1/3/5/3/135327440/xuwexob.pdfIn PDF document text
    • https://cdn.sqhk.co/dovinokobez/hjhgrjg/ultimate_fall_guys_ps4.pdfIn PDF document text
    • https://cdn.sqhk.co/kitolitik/f8RherF/doctor_reverson_rio_verde_telefone.pdfIn PDF document text
    • https://guzarimu.weebly.com/uploads/1/3/4/6/134608133/pilajivodojexoxiz.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/570fd10a-8d91-441f-b3c5-29f3243d69c9/66230601869.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63fcb317-b874-41e8-a1d1-35070c8f57f2/28770048424.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cd33987-3c93-42b3-9a1d-07e4a6474f46/sansui_tv_factory_reset_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e25d18a-fe75-4e69-95f3-45c43f63d01c/losuwavaxipitujebos.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_off0000fbd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD8 5144 bytes
SHA-256: 63d436aad8cae5fda4b538ade8d1cd365a776e9019ca67721313c35f930809d5
font_01_sfnt_off00010d5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D5D 11908 bytes
SHA-256: 0309d602aeb73fdba9f5014e5f7c2a717cc0b4c4dd827c77290d83301c3a0701

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