Malicious PDF — malware analysis report

Static analysis result for SHA-256 678ae8fcb85c06d4…

MALICIOUS

PDF

66.3 KB Created: 2020-11-10 18:40:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: c4479b14499217874437aa084d85d01c SHA-1: 26d31eb192828f400ed72291e3cddf4cf6c1c095 SHA-256: 678ae8fcb85c06d4c5ec5187944899bf8d09ef006b8402c1728728d466b10a8f
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/strik?keyword=american+revolution+word+search+answers PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xebuvuwov/88973464337.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/17557568339.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78bff24d-f4ab-4c33-a083-e7735d489f00/12978061236.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/riwikakudum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/898e02fb-a1ec-4d03-a004-22b1c6ca833c/study_guide_for_emergency_care_13th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec3e99f2-ec49-4ade-a441-49ae0353a386/nivuvu.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/usa_studies_weekly_5th_grade_week_13_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/vivutokimarotagafaw.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/5276978653.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/falling_slowly_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/threshold_frequency_units.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/tax_return_calculator_2020_taxact.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6dab03a-0c14-4061-8fb4-4d19b8cd2352/words_for_power.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA4C 5200 bytes
SHA-256: 9c1c01501ad6e5ad5802342286a2bb937c4738d0b99acd64991067a1ad5f1148
font_01_sfnt_off0000cbd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBD6 10192 bytes
SHA-256: 90d8141457df6210cb1eef7f9b14866564a550134bcc4dccde5f869c10bfd38b
font_02_sfnt_off0000ee3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3D 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378