Malicious PDF — malware analysis report

Static analysis result for SHA-256 c320f09e6c8ae9b7…

MALICIOUS

PDF

70.9 KB Created: 2020-12-19 05:28:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 418cbf42f9c6f0135716c3b662d78e7f SHA-1: 6ceaf935ba1a710c1b8a67d5ec2962b5530d8fe9 SHA-256: c320f09e6c8ae9b78574b6649a556f76fd2d40f8a7f16163efc1733d01d0a974
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document identified as malicious by ClamAV and an ML classifier. It contains an embedded URL that directs users to a site likely involved in phishing or malware distribution, disguised as a job application guide. The PDF structure itself does not contain executable scripts, but the presence of the external URL is a strong indicator of malicious intent.

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://trafftec.ru/strik?utm_term=susan+ireland+cover+letter+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4487663/normal_5fd27b71d793b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426701/normal_5fc1f482ecb80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369317/normal_5f883dcec152b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4506063/normal_5fdd220020995.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375698/normal_5f93cb1282c10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386618/normal_5faf0283a11c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483610/normal_5fc085d85e179.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480753/normal_5fd37e5db26c0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470542/normal_5fca00f106da8.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/79bf55bf-00b4-4f25-beb5-feb4da15b620/3065775521.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee8da63c-6000-4b2d-a127-fae7b6868651/la_maquina_que_cambio_el_mundo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1393b40f1034a5caafdc7/t/5fcb1dca11c29807e6d3f797/1607146956413/math_vocabulary_flash_cards_printable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/285cc037-3fe8-4853-b850-ee1e8b918662/b20_integra_swap_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4b66cbd-6404-46f0-9d31-1951aacc0f50/vojitojiziro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcae7f9d-51a5-47c8-879a-556e6ac47324/trapsoul_bryson_tiller_free_download.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_off0000d68d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD68D 5272 bytes
SHA-256: 2ff6d034d6ccbc1c4203af39e3f193307cbdd6a0a4c1d646cdaab7275247d1b2
font_01_sfnt_off0000e885.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE885 10672 bytes
SHA-256: fcbc655638790294cd864ff3aed0e132444e7a121d58a4457040be4f392d26d3

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