Malicious PDF — malware analysis report

Static analysis result for SHA-256 62be068d67018823…

MALICIOUS

PDF

69.0 KB Created: 2020-11-20 23:40:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 2288209412818ae7fe900e55b5312ed8 SHA-1: 1f21496d815e02db7ee694e617d36a2b44661d91 SHA-256: 62be068d670188239b065cd99aa0dcc307d216ccdb8cab34f55c89aabec6885e
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a significant number of external links, suggesting a link farm or redirection scheme to distribute malicious content. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly indicate an attempt to direct users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=replace+chrome+os+with+linux+mint PDF link annotation
    • https://lavigumujow.weebly.com/uploads/1/3/4/4/134438710/zimagiror-tanir.pdfIn PDF document text
    • https://gemikomumupoj.weebly.com/uploads/1/3/4/3/134393585/9347387.pdfIn PDF document text
    • https://lulitetuxopibol.weebly.com/uploads/1/3/1/1/131164377/disabojezobid.pdfIn PDF document text
    • https://zigegawemofeza.weebly.com/uploads/1/3/1/4/131406932/mebaxapiletimikiw.pdfIn PDF document text
    • https://zimiduninu.weebly.com/uploads/1/3/1/6/131637103/6595245.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/buponuwebi/hunger_games_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/libizozujazibix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/191cf8d9-0887-4c70-93f8-7b19af270786/lezuvuziligokujemozifi.pdfIn PDF document text
    • https://s3.amazonaws.com/pegek/38012564563.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a16d9f0-a513-4191-a150-7879ca67529e/81661513283.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/central_govt_ministers_list_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c800c11-8c0f-453f-aaf4-53c4645f6612/47011850363.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/651313de-6ddd-4dd3-a43a-ef850d42f17a/64179851555.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_off0000d206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD206 5340 bytes
SHA-256: c3f0c64bbd7780606a191b9362f1781b367e0a8c4f015ad71b16286e4f178df1
font_01_sfnt_off0000e417.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE417 10440 bytes
SHA-256: a9526517b17b1cfbea6d4be97aae06e6bb38cd6ca9a053b002567d1d3b8c1d06

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