Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2f309f6aed27850…

MALICIOUS

PDF

65.0 KB Created: 2020-12-04 18:03:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 3553cdfef3c4e7a0085a541f0449e038 SHA-1: 927bf89dec413d557b0a2885d2157815fa181740 SHA-256: d2f309f6aed27850140198986ca355a9793516109210cbb841e69f8a4ae4da43
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://trafficel.ru/strik?utm_term=the+poison+tree+cast PDF link annotation
    • https://kufazijofiw.weebly.com/uploads/1/3/0/7/130776126/8d50340.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459027/normal_5fa0d7e8d0355.pdfIn PDF document text
    • https://jonukejunuxesa.weebly.com/uploads/1/3/1/4/131409236/ronoxugeputi_jomuxes_morazolo_tufakiloledi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478131/normal_5fc839a6e5726.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413701/normal_5fa3695d72b28.pdfIn PDF document text
    • https://zaronubiguxade.weebly.com/uploads/1/3/4/6/134685024/damufu.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/muvarelo/algebra_1_regents_june_2014_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07210d7a-a5a5-4d13-bdf1-d8be4a85e273/jabedose.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/36143279324.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/43834519118.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/xabefonisa.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd017668bfc51861688c6a/1606222198937/written_statement_for_not_filing_taxes.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/liremisoniritanamav.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_off0000c470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC470 4940 bytes
SHA-256: 07dd10f8ee0b402170c8acedf6502640da32bcb5850e0c75d7ed6f7662caf4ae
font_01_sfnt_off0000d533.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD533 10092 bytes
SHA-256: 2d157f19a63c3c2864b95481c9b1dc93958f2725f9146f50b03b514f92f6ffe8

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