Malicious PDF — malware analysis report

Static analysis result for SHA-256 371a3419cdc847d5…

MALICIOUS

PDF

63.4 KB Created: 2020-11-16 19:49:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 37721160452457a0c8b961900e948933 SHA-1: 373832b98e941936bbf702d796dcbe495bfda0ab SHA-256: 371a3419cdc847d52c3f0ca6c898917ff2cd1b5040eb8df661eb34721b85ac14
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URL that mimics search results for obituaries, likely intended to trick the user into clicking it. The PDF structure and embedded content suggest it's designed to exploit user trust for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafficel.ru/123?utm_term=norwalk+hour+obituaries+norwalk+connecticut PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379846/normal_5f8d271fdc2c5.pdfIn PDF document text
    • https://fineruliji.weebly.com/uploads/1/3/4/3/134313455/tudiroli.pdfIn PDF document text
    • https://zuforupixonop.weebly.com/uploads/1/3/4/3/134394080/rusipigujub_najebedatalu.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/xewuj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411923/normal_5fae94504e74b.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/nazekisigiduz/jexelegepujulozen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/627637dd-7f00-4226-80fc-639cd4fda82b/81485689762.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/18806984985.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a9cd845-d49f-4cba-a426-5b4a5563b071/64506685987.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/tamilnadu_history_in_tamil_language.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_off0000bcb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCB4 5152 bytes
SHA-256: 86b935e322c0f003b974762c2e068172bda7cc3a288645f25f3868ae24ceb117
font_01_sfnt_off0000ce49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE49 10252 bytes
SHA-256: 294bd97adb8fd3d7472993f2bcfda58ac9c0a1e6509cecfbfc2faedf10885109

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