Malicious PDF — malware analysis report

Static analysis result for SHA-256 47cfd74972db0618…

MALICIOUS

PDF

93.9 KB Created: 2020-11-24 08:25:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: e21a2c9eb37e95df448f07607ae89e26 SHA-1: 019ba0783cecec2c85003630b244df5481a9750e SHA-256: 47cfd74972db0618b15afe24e25ac881eabba2868d97da463a883586f437df71
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying a 'PDF_SEO_LINK_FARM' suggesting a large number of generated links. One of the primary external URIs points to 'trafffi.ru', which is likely part of a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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://trafffi.ru/strik?utm_term=ibn+khaldun+muqaddimah+summary+pdf PDF link annotation
    • https://varipejat.weebly.com/uploads/1/3/0/7/130739080/3184818.pdfIn PDF document text
    • https://resibifusonuj.weebly.com/uploads/1/3/4/8/134878176/1950142.pdfIn PDF document text
    • https://benerema.weebly.com/uploads/1/3/1/4/131408328/sepowugarubim_senifodid_zoropadeg_sesuti.pdfIn PDF document text
    • https://jugizefabugej.weebly.com/uploads/1/3/4/3/134377355/ceae7f.pdfIn PDF document text
    • https://mulovepo.weebly.com/uploads/1/3/4/6/134666579/acc5e9.pdfIn PDF document text
    • https://narokijobuwixe.weebly.com/uploads/1/3/4/7/134738868/kuwanidok.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/3544679.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500444/normal_5fba8c6ad2ddb.pdfIn PDF document text
    • https://mufalugibesenu.weebly.com/uploads/1/3/1/4/131453255/tisonanoxurewubanupi.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/vekodupiwarobi/vawevabedefedonideduzebo.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/76518187951.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57b21c61-564f-48d2-b5b0-c5359fe5193a/13684371439.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/devi_puranam_in_telugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad4d4420-3f20-4e00-924c-4a4cf6ccc088/xilarekimuwefilugub.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/sunox.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_off00013457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13457 5648 bytes
SHA-256: 0af0c606dafd04a23c6ab805c62748d3c636b80aff74ab9805134a313e4b25a7
font_01_sfnt_off0001475f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1475F 10236 bytes
SHA-256: 427ac53aadcc012696d9606e4e137866a9cc758ccf64a94a5384451903c71df5

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