Malicious PDF — malware analysis report

Static analysis result for SHA-256 095d9cab88880f6c…

MALICIOUS

PDF

95.3 KB Created: 2020-11-19 13:57:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 312d86abb628621a28fd848cb14158f1 SHA-1: d541f52fb5315c30ae62913f88074f853ccf088c SHA-256: 095d9cab88880f6cae5acf78fc1636cc26822eab95a54f98f9a4c64bd12abca7
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. No scripts were extracted, but the presence of the external URI is a primary indicator of compromise.

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://trafffe.ru/123?utm_term=s+blend+words+speech
    • https://cdn-cms.f-static.net/uploads/4382430/normal_5f974e72d5685.pdf
    • https://cdn-cms.f-static.net/uploads/4413570/normal_5fb5101c4709d.pdf
    • https://cdn-cms.f-static.net/uploads/4368984/normal_5fb4e65b862b5.pdf
    • https://cdn-cms.f-static.net/uploads/4375507/normal_5f9742154f9b8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/timafatafej/89217909649.pdf
    • https://s3.amazonaws.com/muvevanepen/advanced_mathematics_problems.pdf
    • https://s3.amazonaws.com/boxujetanonikuv/pulub.pdf
    • https://s3.amazonaws.com/dinigugaxej/keniferi.pdf
    • https://s3.amazonaws.com/kelageketisefuv/47285471524.pdf
    • https://s3.amazonaws.com/vudivuzakal/20586239948.pdf
    • https://uploads.strikinglycdn.com/files/703998a1-65b5-4266-bc86-99fcb5d893b2/79371629004.pdf
    • https://uploads.strikinglycdn.com/files/ea41dfda-0826-4940-b266-d0f5c565b15f/bear_file_converter_midi.pdf
    • https://uploads.strikinglycdn.com/files/6f348284-1a83-4e74-9efe-e772002fdce9/58538674599.pdf
    • https://uploads.strikinglycdn.com/files/5fa6e4f9-7ba8-45be-a18b-b8c1cf6e5273/gepoz.pdf
    • https://s3.amazonaws.com/fukezavazuj/gafej.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000138e3.bin
8a6dbeedcf113f5e75b435fda5eb6ea67839c9eaa1c8fc49a9cce66c477b6cab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x138E3 5284 bytes
font_01_sfnt_off00014adc.bin
877e3f12713377d1961ff55d01c08b1c5af8d83d7934b23b0a1b2ce881da07e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14ADC 11380 bytes

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