Malicious PDF — malware analysis report

Static analysis result for SHA-256 f19b060a22a66225…

MALICIOUS

PDF

83.7 KB Created: 2020-11-24 04:57:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 3d56cb38e8517490310256204fd71c7a SHA-1: 864ed9bb622f2b6400d215bd4440370857acf433 SHA-256: f19b060a22a662257e281a52dd93bf8541782d0a17eb9baabb40e3c5b8cb866b
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, with one prominent link pointing to 'trafffe.ru', suggesting a link farm or redirection to a malicious site. The document body, though heavily obfuscated, contains text related to a 'Kubota l245 manual', which is likely a lure to encourage users to click the embedded malicious link.

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 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.
  • 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://trafffe.ru/strik?utm_term=kubota+l245+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382631/normal_5f9588b957843.pdfIn PDF document text
    • https://lulitetuxopibol.weebly.com/uploads/1/3/1/1/131164377/banapugemet-mobex.pdfIn PDF document text
    • https://ramaxuvezida.weebly.com/uploads/1/3/4/3/134327775/835888.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426088/normal_5f98c2f8bc65d.pdfIn PDF document text
    • https://bagosuberabuvi.weebly.com/uploads/1/3/4/6/134681771/4002973.pdfIn PDF document text
    • https://pekedilude.weebly.com/uploads/1/3/4/3/134324883/51200f.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/xalexojaxipud/fidapijusexuxowuluxo.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/somupawiridepananulaxiwis.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/jitudowupasotamuxi.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/bolly2tolly_tamil_movies_youtube.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/ocean_of_movies_app_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67d57c7b-a191-4669-9eff-2c16cbfaf0bb/rafijipotowapu.pdfIn PDF document text
    • https://s3.amazonaws.com/potamotaz/best_performing_companies_in_south_africa_2019.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_off00010921.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10921 5008 bytes
SHA-256: 566ae224d642ceed9bda01bca57012ba20379c8d4e1e47ef47e3fbab7eeba5f1
font_01_sfnt_off00011a32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A32 11824 bytes
SHA-256: e810425188f885ff6d7d7af23d0e3011b132f2b4618404fca08e3dc93311d1aa

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