Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c2dc410930c6fdd…

MALICIOUS

PDF

66.6 KB Created: 2021-02-28 12:19:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: bd582b15b2464c0ec36e7f8e51fdb3e1 SHA-1: 239ad1e1f13f4244de30147d8da8fa773aba3803 SHA-256: 4c2dc410930c6fdde1fb9fb01242108d492d3ffcba83d77e403b07427a587b9d
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The document body, though heavily obfuscated, appears to reference 'Dyson v6 trigger manual', likely a lure to direct users to malicious URLs. The presence of numerous external URIs and the ML classifier's high confidence score indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jacksth.ru/strik?utm_term=dyson+v6+trigger+manual PDF link annotation
    • https://sukaxivex.weebly.com/uploads/1/3/4/8/134895869/6002452.pdfIn PDF document text
    • https://beluxavin.weebly.com/uploads/1/3/4/5/134507718/5b6ea.pdfIn PDF document text
    • https://vijopafixav.weebly.com/uploads/1/3/1/6/131636601/joxagapozigukemugoma.pdfIn PDF document text
    • https://xaxepilote.weebly.com/uploads/1/3/4/2/134265473/posewiberevika_bovafi_rerub.pdfIn PDF document text
    • https://mutevoleronuxo.weebly.com/uploads/1/3/5/3/135351112/80f0c462923f1.pdfIn PDF document text
    • http://wixiziz.iblogger.org/77909323343.pdfIn PDF document text
    • https://zasosefudasu.weebly.com/uploads/1/3/1/8/131856937/9975642.pdfIn PDF document text
    • https://likixolokezixi.weebly.com/uploads/1/3/0/7/130738950/kufawexowu.pdfIn PDF document text
    • http://nosofave.iblogger.org/my_family_worksheets_preschool.pdfIn PDF document text
    • https://xodebizig.weebly.com/uploads/1/3/2/6/132681497/f0192b982c62ab9.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/bokofapig/kraft_fig_balsamic_dressing_nutrition_information.pdfIn PDF document text
    • http://kanoduluzoxa.epizy.com/wiludazugemipusot.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_off0000c921.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC921 5320 bytes
SHA-256: daa2b4f1ba2bce53ea79a3ac99eeff765786573b7c1fe1e0ba13d3801a22c546
font_01_sfnt_off0000db34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB34 10176 bytes
SHA-256: 39ebedaeeead435cf270e7f23d6f5c4110486436ab2495fe58058ac7eda08492

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