Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c29b26f46531469…

MALICIOUS

PDF

68.6 KB Created: 2020-12-07 19:49:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: fa21cbf09b74b77cd51511332ccec866 SHA-1: d92a433a116d3062b4cf3b2114992af1468cca93 SHA-256: 8c29b26f465314692c9089cd4708f1458b06fd33a5a668cdc3d6c5b549a044e5
96 Risk Score
Tags
free-cdn-ebook-manual-lure

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/123?utm_term=black+scholes+calculator+options PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393208/normal_5f9b60abe2c02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391903/normal_5fa4672f23d0b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426974/normal_5fcbd6ad167d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423454/normal_5f972eb680034.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368949/normal_5f8954b1589c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403129/normal_5f9b52b4bef0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496374/normal_5fabed3672a73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464534/normal_5fb5ed9ec439a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc5936eaffbf90a660a4a03/t/5fc8f1406c6c071153994ab4/1607004485410/zavekabidaxubi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12e51258-cfd8-476a-9c16-94875fb4e741/73205298747.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e90c27a199023ab56552/t/5fc3edea61e25426e1b14039/1606675947999/planos_de_casas_de_campo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1520988c99b6d37aa082c/t/5fc4f7dd9d793648402a02c2/1606744030596/lowndes_county_board_of_education_valdosta.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcee8f8cb11b25c09a85a0/1606217360084/art_of_fear_band.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_off0000cc31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC31 5136 bytes
SHA-256: 3b80aa5bc11076e574ce17a1dc212c1067aad5b5bfba787024b7b2d569ae7993
font_01_sfnt_off0000dda1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA1 11784 bytes
SHA-256: a6c1b365282e35802ff0d08f324c7ce56b62374924762d7633d5c823319821d9

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