Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a1a48c96b0eedd1…

MALICIOUS

PDF

71.9 KB Created: 2020-11-21 05:47:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 7ba55e5ebfcf065c345c386f13381813 SHA-1: 1469fc3b688efcf02f46c8e471bdc0f7eb0467a7 SHA-256: 6a1a48c96b0eedd11cebd2ec55d3e370f615b6396b20ba870580d7c7bb84884e
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://traffking.ru/123?utm_term=marcy+platinum+home+gym+price PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415767/normal_5f99b5da91984.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403422/normal_5f981378112dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456996/normal_5fa0bfaeb1777.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403805/normal_5f9a9ced72992.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421623/normal_5f981fa7f0396.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379237/normal_5f93553eef8bc.pdfIn PDF document text
    • https://wefanuku.weebly.com/uploads/1/3/4/6/134611064/4a2094991bca36.pdfIn PDF document text
    • https://pesadosopovito.weebly.com/uploads/1/3/4/2/134235692/4225227.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zazelujeju/altistart_48_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/drag_racing_bike_edition_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/89346463922.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57339c88-3804-4487-9d37-add28c6a5ada/ritovujitaderugivulivakap.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/dekujiloditivupu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fcd296e-8f52-48fe-8a57-fa8af3566315/carrera_s_engine.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE4E 5160 bytes
SHA-256: d25883a91d45728f5fc4d6e441e3e21f7680346b82c2bdd502d05b882264db9b
font_01_sfnt_off0000dfb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB5 10856 bytes
SHA-256: ddab7dab415251431d09948c8d58f532d605606af8d9d769f5f5e6b039916992
font_02_sfnt_off000104d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D1 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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