Malicious PDF — malware analysis report

Static analysis result for SHA-256 00833de47ca0aa26…

MALICIOUS

PDF

75.3 KB Created: 2020-11-11 10:45:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0af9aa86abf6eb904f73bf796b55e870 SHA-1: dde09565f26f9bc67b3d275c054bf371e2f5a938 SHA-256: 00833de47ca0aa26caff00dc8f5513af1630516edff52ebc9fe6d8c07c807231
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-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://trafffe.ru/strik?keyword=grasshopper+anatomy+functions PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366949/normal_5fa0777115123.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422367/normal_5fa27768c7321.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366351/normal_5f8e4281cd90b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401712/normal_5fa48e14d5c72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388614/normal_5f92e2686ae7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367286/normal_5f879b8eb28d6.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/jubiferekaka/80504298062.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/wiwifupiwegudigozegi.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/95409196194.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c89bc215-b24c-4cc9-95f1-5d1ffa25707f/jutibete.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53dfc558-427d-4cad-ad89-cff497ee4372/15886812935.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000f958.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF958 22916 bytes
SHA-256: 060abdb1481acfabd9a85cb8622b745352a216074668bd7f89d191b24a3f33d7
font_00_sfnt_off0000c5a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5A3 5356 bytes
SHA-256: c5f6a69afce48c5376da61fa0ab61c5320c860dd5aff225ec6eb448f44825d22
font_01_sfnt_off0000d7be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7BE 9724 bytes
SHA-256: 4f6eeaf39db9da9018bf3400444bddcc4bc1843e8d5d2844fa6c015a5a64683b