Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8d160d9a18e726b…

MALICIOUS

PDF

75.6 KB Created: 2021-02-21 18:52:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 83860f8fb2979679ba216cad8f8a0793 SHA-1: 89eb8df3bbc3a467904cec23725196da3806ebc8 SHA-256: a8d160d9a18e726b8ff74364168a10d248fa29437d1b71ada0ff564756f2590a
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is a strong indicator of a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to trick users into navigating to a malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/wb?keyword=robin%20williams%20design%20book%20pdf PDF link annotation
    • http://varistop.site/molajovulijukaxozofekorinczb.pdfIn PDF document text
    • http://pokupka.space/dobyns_fury_rod_guides88vna.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484997/normal_600f42cc66e66.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465277/normal_600295a4372ca.pdfIn PDF document text
    • http://thecabinets.xyz/gekisedujd2qaq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4529893/normal_5ff65e5d511ad.pdfIn PDF document text
    • http://fartook.online/fufarepopefokowigom19sid.pdfIn PDF document text
    • http://dfds.in/88721398053h2g4.pdfIn PDF document text
    • http://ch-bewertung-2888.xyz/joriwexjhpf3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490366/normal_5fda27fa823a7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451377/normal_6001714678458.pdfIn PDF document text
    • http://hotsales-com.xyz/dufowama2nvnf.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/vapelurowar/android_studio_model-_view_presenter.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/bawolubonixixo.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/28784556034.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/frontier_fios_channel_guide_tampa.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/61795655209.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_off0000e84e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE84E 5568 bytes
SHA-256: 63efb78286478cd5b7caac410ab29746cf0dc4aff6dc4fbe3cd6430befc40d9f
font_01_sfnt_off0000fb4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4A 11332 bytes
SHA-256: 5f24f72850bbdbce0e1f77eab7f377e126df3ca94d39d4d4802d44ca29e3d059

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