Malicious PDF — malware analysis report

Static analysis result for SHA-256 e18ec961f5cb932b…

MALICIOUS

PDF

67.4 KB Created: 2020-12-24 00:12:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 71aefcbf90b3ef8193281a0300ac98dd SHA-1: 9889fafacd0943983d831e97e1fd4cff149f0a45 SHA-256: e18ec961f5cb932b7d06e928f0090add2fc24ad901cafd25b4c35c23357cc9d0
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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=introduction+to+thermodynamics+of+materials+gaskell PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4378410/normal_5fce9c3a29017.pdfIn PDF document text
    • https://cdn.sqhk.co/neguvobipa/FiaxOhd/piano_music_for_kids.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453556/normal_5fa6744c19a27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462350/normal_5fda7403c6b20.pdfIn PDF document text
    • https://cdn.sqhk.co/mozejipakas/R4ZB1NW/39461927835.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381081/normal_5fa60bcd7791c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449992/normal_5fe3c0272f5c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401525/normal_5fb73ccc115fa.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/pesetufavo/armature_reaction_of_dc_generator.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/wojirajidorat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04d905b3-4a99-4821-af69-6bc4bb04a144/wasepo.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_off0000c99b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC99B 5540 bytes
SHA-256: 7c67acefe0e467adf8002e312209c0e65edcabc20245545c720b4e316030dd67
font_01_sfnt_off0000dc4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC4F 10768 bytes
SHA-256: 7d90bc58a0dfa7214344b6f1d089f1ef299ad048600a1236dd28e8b82fc655f9