Malicious PDF — malware analysis report

Static analysis result for SHA-256 397fb931aaf72e65…

MALICIOUS

PDF

61.7 KB Created: 2020-11-11 21:51:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b25ce0b2ecd3a3020f39ca12d8e0c86b SHA-1: d10ca417865ad784af872b7a433b5d0247cb4a1b SHA-256: 397fb931aaf72e658a162d623c618ba0fd62b83bf626657de34ba50114338f3c
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 0.9996

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://traffking.ru/aws?utm_term=2018+calendar+template+october PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4443588/normal_5fa8e719e2d8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379719/normal_5f8f071a826d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367005/normal_5f97d5af2e2cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410004/normal_5f93544c0ae14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376599/normal_5f8a45c6e8a7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369491/normal_5f8b09356711f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378607/normal_5f8aba405dd66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469103/normal_5fab6faddcbfb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375075/normal_5f8ed7cb2b4cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373782/normal_5f8e0fd859872.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393346/normal_5f914a1b17076.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/50493e21-e099-4556-a220-b6286ecf3731/95653591857.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13577f27-0005-45f8-9f87-c2f344884c44/xuwiguxunujinovasu.pdfIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/manobavewose.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_off0000b3c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3C1 5604 bytes
SHA-256: faac628f4d89db75c12d845d1fd2e644e162bbcc4c1d2556e33c5b3e5aba4752
font_01_sfnt_off0000c6a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6A7 9840 bytes
SHA-256: 0c61afa9925d6265ea9ef5da5cb1924900d0af91600cf73379f1858f7bd14cdf