Malicious PDF — malware analysis report

Static analysis result for SHA-256 d220a72184068030…

MALICIOUS

PDF

71.1 KB Created: 2021-01-09 21:21:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 05b0e94c341129cd8c588bc88d1cecf5 SHA-1: cbf49a0ddbc3b0f0cab5dbbb3799ebd1b8e71afe SHA-256: d220a72184068030828f4a9a180d2a20bfc8f4e00ae2a34b50c4df2253f8b519
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, and contains a large number of external links, indicating a link farm or phishing attempt. One of the embedded URLs, 'https://trafficel.ru/123?utm_term=rainsford%2527s+by+design', is likely part of this malicious infrastructure. The PDF also contains embedded JavaScript, which could be used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=rainsford%2527s+by+design PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4449603/normal_5fca650805c60.pdfIn PDF document text
    • https://kololeranazi.weebly.com/uploads/1/3/4/5/134583506/2677817.pdfIn PDF document text
    • https://mesipaku.weebly.com/uploads/1/3/1/3/131383407/8346474.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421471/normal_5fee05a5b6476.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474727/normal_5fdfbd5c44868.pdfIn PDF document text
    • https://pigumetazemebet.weebly.com/uploads/1/3/0/7/130775485/cb3da3e.pdfIn PDF document text
    • https://pigaxapi.weebly.com/uploads/1/3/2/8/132815084/9389930.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459791/normal_5fe0e625804ec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404739/normal_5ff116514da20.pdfIn PDF document text
    • https://site-1167972.mozfiles.com/files/1167972/cross_stitching_supplies.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478683/normal_5fedf172cdc33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481847/normal_5fb8c3109d55e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391009/normal_5f9a2585a6181.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/lusabifef/zugowezu.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_off0000cf27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF27 5324 bytes
SHA-256: ad454f6c7370086800d8ad41c91d1714020c2c537d93059071778be6b4a6c1c4
font_01_sfnt_off0000e16a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE16A 13948 bytes
SHA-256: 10c95ca82bd5a27c8689ba124c1a864afd5ba0a88a28a32a833aed88ed74aebb

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