Malicious PDF — malware analysis report

Static analysis result for SHA-256 94a4c5717116b076…

MALICIOUS

PDF

74.0 KB Created: 2021-02-27 05:42:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1e9ac6a68ea27eff4e7a1f0e1066b5e9 SHA-1: 0139518095c977d12cdea4ab0eeeb6cf9c21b95d SHA-256: 94a4c5717116b076faa7e77094a7109b3bee8e975d705f1a5921ef79b7a6a75d
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, suggesting a malicious intent to redirect users. ClamAV detection and ML classification strongly indicate maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or SEO manipulation scheme.

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://lozipotod.ru/123?utm_term=swiffer+wet+jet+pads+for+wood+floors PDF link annotation
    • https://gimiduti.weebly.com/uploads/1/3/4/7/134711596/fufebudebazen.pdfIn PDF document text
    • https://danonifakusore.weebly.com/uploads/1/3/1/4/131483465/fcbe60a4395343.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366642/normal_5fda21f09f947.pdfIn PDF document text
    • https://bamufikike.weebly.com/uploads/1/3/1/6/131606241/pubesozewenixolil.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403262/normal_5fce966024020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449781/normal_600ccce8b40fa.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/likadojivivofu/patovotuwaso.pdfIn PDF document text
    • http://zobemodorujo.rf.gd/16736378008.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/zipituneramapuzifetetaw.pdfIn PDF document text
    • https://s3.amazonaws.com/zoluwivebiro/57899792519.pdfIn PDF document text
    • http://fudedeki.rf.gd/kubikodeluve.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/fazogukuvezasuzozifarugo.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/agilent_gc_liner_selection_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/vapimikinuz.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/getidewopujemew.pdfIn PDF document text
    • https://s3.amazonaws.com/resabomibogodaw/8256624168.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_off0000e3af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3AF 5304 bytes
SHA-256: 77a0421f985e294329f5063c8afe634b1c1a348c3e902afb9a396a8981146af4
font_01_sfnt_off0000f5dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5DC 10864 bytes
SHA-256: 9061ac39bfa8a268ac27da4c64753ead29ef9137c87e0676d103d3def3e2ba7a

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