Malicious PDF — malware analysis report

Static analysis result for SHA-256 2020df650d91b15f…

MALICIOUS

PDF

70.8 KB Created: 2020-12-26 23:14:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 572c927266e425ecb90a4710d80e64f5 SHA-1: b7673210b3d1b9e23860f89e0431ea0b92dc1bd7 SHA-256: 2020df650d91b15f4a9be447992013afc7f34cc99a9896377f34439cb7c34cd5
96 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains embedded URLs that likely lead to further malicious content or phishing sites. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, suggesting it might be a generated document used as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffset.ru/aws?utm_term=bye+bye+bye+nsync+video PDF link annotation
    • https://betewobinolatid.weebly.com/uploads/1/3/4/7/134756009/9093774.pdfIn PDF document text
    • https://magavesitike.weebly.com/uploads/1/3/4/5/134581553/sojokude.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368772/normal_5f8d2fccbd5b3.pdfIn PDF document text
    • https://wolunogejafijut.weebly.com/uploads/1/3/4/6/134649672/badagag_fuloriwefi_movite_texetizejome.pdfIn PDF document text
    • https://mepowisa.weebly.com/uploads/1/3/4/5/134595914/korujegen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393515/normal_5fa3676e53e58.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/86ad9e7b-6c4c-4607-ba1c-e8eb94f433fe/mini_desk_fridge_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/afrikaans_tweede_taal_begripstoets_graad_6.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/38496495502.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/764446c3-7afd-4259-a885-ae55a7621883/52099193983.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/kozeterafoxuti.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC88 4948 bytes
SHA-256: c05bb1bb1cdfd256a23b14e540bfad482bc07836729bbd6d5038ec57d9fb670a
font_01_sfnt_off0000dd81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD81 3720 bytes
SHA-256: d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280
font_02_sfnt_off0000e8e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E4 10544 bytes
SHA-256: 421c14dbc662c8d34c3eee0a7c55609840ca40e95016a1eaffbcb8fdace46d19