Malicious PDF — malware analysis report

Static analysis result for SHA-256 001f0ecaa6cc285c…

MALICIOUS

PDF

67.2 KB Created: 2020-11-10 00:54:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 3f83a77e68604e8b86c5e140b7599496 SHA-1: 9668eca8bb4f5da885b6e7b13fc70cfc66d0105c SHA-256: 001f0ecaa6cc285cc20abb0030b38d50c05dd2f86c5478ffd7d9d18a24d7b423
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://trafftec.ru/strik?keyword=playit+apk+download+for+windows+10 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373757/normal_5f8c775a2f4bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370068/normal_5fa46649a1bd3.pdfIn PDF document text
    • https://fowidejufato.weebly.com/uploads/1/3/4/5/134582967/kuduxomu.pdfIn PDF document text
    • https://nujolekilerimiv.weebly.com/uploads/1/3/4/5/134501562/2028285.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403954/normal_5f959313910c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389095/normal_5f9f3ad2b2f63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421352/normal_5f9e4032ee214.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470035/normal_5fa82eebe0663.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366004/normal_5fa1e76c2a28a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405197/normal_5fa5707c02d43.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/zugutixe/disasigovi.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/65814664264.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/alif_episode_10_by_umera_ahmed.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/canoe_software.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/antrenmanla_matematik_2.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_off0000ca39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA39 5488 bytes
SHA-256: 6e874f8e4030f2bebe6a2e600a6efeb8ced52b1f548cfce6b48ab30b44168166
font_01_sfnt_off0000dd14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD14 10204 bytes
SHA-256: 47c5b0713de3476079e10d799a2f7e172044a0c28ebeedb6d3c71449993966a5

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