Malicious PDF — malware analysis report

Static analysis result for SHA-256 14185d0e6ca4b909…

MALICIOUS

PDF

79.3 KB Created: 2021-02-08 11:26:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: fa6b27d76d3105915ed81496f2ab825d SHA-1: 7050355bfed84c55a8e642210ab07a3ba4838917 SHA-256: 14185d0e6ca4b909c2d592a1b95b3bc6bf2a2e98a48e2dfc6eaaa4fe875806a0
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to suspicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically identified as a phishing trojan. Although no scripts were explicitly extracted, the PDF structure and the presence of external links suggest it is designed to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/aws?utm_term=vpn+app+for+android+4.+0 PDF link annotation
    • http://lnstagram-blue-badge-form.com/blender_glass_materialj29uv.pdfIn PDF document text
    • http://dressnbuy.com/75041422552eypmj.pdfIn PDF document text
    • https://sifuparara.weebly.com/uploads/1/3/4/3/134352995/vajudelezabaron.pdfIn PDF document text
    • http://healsmall.space/45944380985qlku3.pdfIn PDF document text
    • https://liwotagavujid.weebly.com/uploads/1/3/5/9/135961529/19a524e.pdfIn PDF document text
    • https://lewobagapu.weebly.com/uploads/1/3/4/6/134666085/e9ac8381a7b89b.pdfIn PDF document text
    • https://gibetixogi.weebly.com/uploads/1/3/1/6/131636946/xajure-luwufo-bariliku.pdfIn PDF document text
    • http://naturfresh.space/fusion_360_ita_crackz384v.pdfIn PDF document text
    • https://xaxibilezulaf.weebly.com/uploads/1/3/4/0/134096047/gufoloruduzit.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/mejifavo/10068957030.pdfIn PDF document text
    • https://s3.amazonaws.com/gonima/celtic_woman_danny_boy.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/kaduduxagito.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/delphi_greece_audio_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/77201836301.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_off0000f8be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BE 5052 bytes
SHA-256: 543c057cbdb4ad6a2674885f8e3efbe663b45ce2a598fa2626ca22515e72fa0a
font_01_sfnt_off00010a0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A0D 11268 bytes
SHA-256: c7d2033871b23691e932ae1d62934dccc3a80d7f9db71dff71b80deae4fb51d1

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