Malicious PDF — malware analysis report

Static analysis result for SHA-256 00a85fc80b396f01…

MALICIOUS

PDF

58.6 KB Created: 2020-12-23 23:46:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: d6987602b320eebda340ce4151052318 SHA-1: f2d7b0a71ec8230de560c2aff7459dfdb77ba0ee SHA-256: 00a85fc80b396f0137c575ea87d937159a1f004907919b5af45ab5206ff65ee7
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a password-protected-archive lure. 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 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://trafficel.ru/123?utm_term=child+psychotherapy+homework+planner+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413987/normal_5fda5e97b1dbc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369499/normal_5fdb5be6d4c72.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368751/normal_5fca59c4644cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487431/normal_5fc4284254145.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/d2b66e6b-ada7-4f74-9e2d-76a672ca11f9/91404124254.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/ffviii_remastered_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5adece42-8b1c-40b1-a80b-b72271194b49/mahindra_manual_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aebe99dd-6d32-4bc3-a411-ddbd2f42bf85/25955713902.pdfIn PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/bipifolafujifulerisopas.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/listado_de_aines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa64e3ca-fb31-449a-89e0-8fa0efd0888a/nevefimoroxubevilofomabuw.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/fiferilisaduvoxilo.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_off0000aa8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA8D 5560 bytes
SHA-256: 8d6d97276429cc400f03ab79087a8ae7d0cc8b66aa410354904fd52c63ee7380
font_01_sfnt_off0000bd5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD5E 9608 bytes
SHA-256: b769935c0fc1a36af80daab8a1e9c8862fab4ef3139cea8522f9abcd375623c3