Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6c26b8f1f6a0fd2…

MALICIOUS

PDF

66.8 KB Created: 2020-11-13 06:44:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: b849a302540980dc15d4bb3eac3374b5 SHA-1: be9818f3c6bfcce5d552df37c041d0db5dad1fd4 SHA-256: b6c26b8f1f6a0fd21477098f908e982a81d876d21ff1827123cccaf3676da4ca
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, a common tactic for link farms or phishing campaigns. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as Pdf.Phishing.Trojan. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic suggest the document is designed to redirect users to potentially harmful external sites, likely for further exploitation or credential harvesting.

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=honda+odyssey+2014+dvd+player+manual PDF link annotation
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/21083.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369496/normal_5fad9ea2e9e95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393022/normal_5f9cd83c7a0e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464083/normal_5fa3e4abddabb.pdfIn PDF document text
    • https://fomunova.weebly.com/uploads/1/3/4/6/134684458/5406479.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404293/normal_5f9cb76a18db1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418166/normal_5fab1f66224ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384159/normal_5f908ea6536fe.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/mivokozibu/bogotuwezubekipax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd4e0e95-0d0e-4ae2-932c-f7f520972ae0/84255121724.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/534d693d-4025-429d-a470-1d3decec7e5b/38788345279.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_off0000c6c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6C5 5640 bytes
SHA-256: b1eff8efcb507ceb0bd53523b1b17637b39212703401c5f6cde3eb3f63cd50ca
font_01_sfnt_off0000d9f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F4 10236 bytes
SHA-256: b071fc917fa2a45c9c591bc96f24340e58d8d38c6acff59f8a27bddf4fa7f43e

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