Malicious PDF — malware analysis report

Static analysis result for SHA-256 1048c9bc75256592…

MALICIOUS

PDF

62.5 KB Created: 2020-11-24 10:26:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 2b5fa3d9f62f7ddfcfef9c43e8a40493 SHA-1: 5e957b75c35a892fe79b3abf1652c6fca8e52451 SHA-256: 1048c9bc75256592f557dfa53ea250c2e83f5b4274805c10148ea1337948fd08
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. It contains numerous external links, with the primary ones pointing to 'trafficel.ru' and a PDF hosted on 'cdn-cms.f-static.net'. The presence of these links suggests an attempt to redirect users to potentially harmful content or download further malicious payloads.

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/strik?utm_term=respiratory+system+mechanics+physioex PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450152/normal_5fa1cf4c8fd46.pdfIn PDF document text
    • https://sizukejagu.weebly.com/uploads/1/3/2/6/132681884/pozorefuxileno.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467612/normal_5faffa6a5531d.pdfIn PDF document text
    • https://biwizodem.weebly.com/uploads/1/3/4/6/134650183/luwufa.pdfIn PDF document text
    • https://mekozatopuwuju.weebly.com/uploads/1/3/4/5/134512494/lokuzopijodikipolon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e68eef8-e073-441f-81d3-31d4cba8ee86/bobirix.pdfIn PDF document text
    • https://s3.amazonaws.com/luvamekonivoz/papa_freezeria_game_unblocked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a8369cc-06ec-4758-956b-1612cdcebfbd/paxepowuxijanuki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e83f49c-f765-4f11-968e-cd784cdc7a8a/tumaxepilarenun.pdfIn PDF document text
    • https://s3.amazonaws.com/bagisi/harbor_freight_franchises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bfaf7f3-6bbc-45a5-aac2-18e032ef650a/84717095476.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/fourth_grade_division_problems_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/map_of_appalachian_mountains_in_kentucky.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b5bc629-7db9-4a62-9e05-044881ce590f/retenonodozopasalejeruxuz.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_off0000b781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB781 5316 bytes
SHA-256: 17e7973329930bc2973e0f1b52a30bc52cdb89c0454b581123da4f33c8605cf5
font_01_sfnt_off0000c97f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC97F 10556 bytes
SHA-256: b163a1c2cd98da6733760ddec3e52aa02e64fe0f39fb7ecd1bbf321ea73d923b

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