Malicious PDF — malware analysis report

Static analysis result for SHA-256 2febdfa192b260a7…

MALICIOUS

PDF

75.3 KB Created: 2021-01-08 19:06:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: bba5ce4d13b1bcf4d29f2ddde57deb55 SHA-1: 0630d440ed4ed4929451bf592e1b90d21c2c973e SHA-256: 2febdfa192b260a791f2c78c98e083523949e0b95f3f1ce313083c38c47a0f28
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one pointing to 'https://trafficel.ru/aws?utm_term=utorrent+portable++zip', suggesting a phishing or malware distribution attempt. The 'PDF_SEO_LINK_FARM' heuristic indicates a large number of external links, further supporting this. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification confirm the malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/aws?utm_term=utorrent+portable++zip PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4406229/normal_5fcb142185410.pdfIn PDF document text
    • https://femuketidoxesi.weebly.com/uploads/1/3/3/9/133997502/mowinanovove_guromidek.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405179/normal_5fc6af57b0ea2.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/jotizifime/aitkin_county_warrants_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8ec5b21-7166-4ed5-a540-73b91962cd41/charlie_and_the_glass_elevator_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/37037399745.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c731680-c2b9-459b-8a90-dfbd8a381cc4/descargar_neo_bomberman_para_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/cub_scouts_lion_den_leader_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/nedijowewoded/free_waterfall_chart_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/25700303496.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/xonodofotizurevifuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de8fd6d2-3d57-44a2-b60d-d2350d6a8b51/table_manners_quiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d364ec54-a5cd-4038-885b-e4f7b57d42c9/82457079195.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/happy_birthday_bunting_template_printable.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_off0000ecf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF6 4816 bytes
SHA-256: d421634572d689393743ae7009df488a7249d9bc0f4bd53c5b4b5dcd204910ab
font_01_sfnt_off0000fd6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6A 10184 bytes
SHA-256: 61b5daf365589fc1a631ac72ca68e7099cc84d3ee5835a5ae5284cda06c39b2e

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