Malicious PDF — malware analysis report

Static analysis result for SHA-256 a673a58b843c45f1…

MALICIOUS

PDF

63.4 KB Created: 2020-11-14 20:41:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 76721d563ecda15a002d98b32c122ecc SHA-1: d269cebc60494537622e059632f535163c17acab SHA-256: a673a58b843c45f1abe749372b998de6b447c1676cf45b14f05a4c41b5924b09
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://traffking.ru/123?utm_term=the+woman+in+black+extract+pdf PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/tiputaxevekelelutuxarexi.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/appraising_evidence_for_nursing_practice.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f9cd3bf-0b60-4af5-a5b0-88e9fb74ca0c/aashto_guide_for_design_of_pavement_structures_1993_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/69966879001.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee625b12-4453-4707-b163-7f01308cd261/kanugiroladafonofawekujaw.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/did_little_master_season_4_episode_1.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/25318543938.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99ec1a18-40bc-4bbe-b667-52339190e07d/87744144827.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/uc_browser_app_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3721743c-cec0-4a28-b073-f0da1136c631/rakatazixesiwezun.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/48908077989.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/calculista_de_estructuras.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/68159297086.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_off0000bc54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC54 5528 bytes
SHA-256: dc21e77061bf5f2316122ba361f28fe3ae4d8d0f416196ef2cd00aedd9484300
font_01_sfnt_off0000cf04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF04 10064 bytes
SHA-256: a8e173290c6278fbed25387ab045d31dbf4adc0ad6718c954832152d891597d3