Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9d4a55c23de10fe…

MALICIOUS

PDF

73.4 KB Created: 2020-12-17 15:55:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: d8d9655863c95643741848872db16998 SHA-1: f5e60c8cdcca93be55fde7f9b18545a051632d5c SHA-256: a9d4a55c23de10fee5a12013aed5d8ba0d9ef587e37059c8119afefc2e36f015
156 Risk Score

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, with heuristics indicating it contains external URI links, including one to 'traffnew.ru'. The document body, though heavily obfuscated, contains text related to 'medical alert systems canada consumer reports', suggesting a phishing or social engineering lure. The presence of external links and the malware detection strongly suggest this PDF is used to deliver a malicious payload.

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://traffnew.ru/aws?utm_term=medical+alert+systems+canada+consumer+reports PDF link annotation
    • https://vagipirisixo.weebly.com/uploads/1/3/4/8/134861957/1432986.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/5fcebf643a18db22fbe7b6d5/t/5fd0e0d25c296e7a68804481/1607524562970/63075387705.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/words_with_nth.pdfIn PDF document text
    • https://s3.amazonaws.com/xupimaral/21490942466.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d8fc0b6b03258f35503a/t/5fc24c5d18e72e5fdb22dc52/1606569055239/39564757282.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1193b5687f52b6b825229/t/5fc4e01c3c02f22b9da5e081/1606737948917/96768780972.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/who_killed_rebecca_merlyn.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc553872e537a05ef266587/t/5fcc77ddcded405bb8d13dcc/1607235550364/ikea_black_friday_2019_nl.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2b9efbdb33045eece00d9/t/5fc4f1c33570fb44d19e08b3/1606742468128/60229075370.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e2c57848ba205d187778/t/5fc145ffa97599144e267201/1606501888961/82257381908.pdfIn PDF document text
    • https://s3.amazonaws.com/kotenu/cronusmax_online_manual.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_off0000e27d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE27D 5324 bytes
SHA-256: 7d6675190da1076536ad12a70efe50a6ff83ebdf2ab005841af18dfac3d79e30
font_01_sfnt_off0000f495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF495 10456 bytes
SHA-256: 10b29346491836e017bd98d0dacade28a17cd80ccebee4d024a9bd77d9e2b447

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