Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8bef5915e38f26b…

MALICIOUS

PDF

66.6 KB Created: 2020-11-24 17:47:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 90b3530ba410ac16cbf3eacbb752cfff SHA-1: d955714ce46bc1a17b0e341ae42b0050a593127c SHA-256: d8bef5915e38f26bd8e8aecde9d5580b41d06b36a8a4d0ceb7fc652a2c79bd4c
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://traffset.ru/aws?utm_term=cardiac+rehabilitation+heart+failure+guidelines PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367279/normal_5fa20027803d3.pdfIn PDF document text
    • https://gokopawe.weebly.com/uploads/1/3/4/4/134493337/voxexinelosiremejas.pdfIn PDF document text
    • https://dowikonusinewe.weebly.com/uploads/1/3/4/3/134374018/zafawexuw_fegatemiwelolox_jitenuna_vefolegenegur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374860/normal_5f9d7aa26522d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368746/normal_5fa552791ce6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409413/normal_5fbb1d8a63234.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/rizijubovapuk/52106123925.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/angiospermas_ciclo_de_vida.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/24580363525.pdfIn PDF document text
    • https://s3.amazonaws.com/fexuror/solutions_and_dilutions_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/firefox_for_windows_server_2003.pdfIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/discovering_computers_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/a2212_bldc_motor_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/37009297994.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_off0000c7c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7C4 5328 bytes
SHA-256: e19742cc21e0969b0a46cc2d1775ab7684a58573b9b2e36a6be4d85190c9b095
font_01_sfnt_off0000d9d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D7 10396 bytes
SHA-256: f467e20227234024b58a525692839afc44097d0addab68ce24a563d00bf2769b

Open this report in the interactive analyzer, or submit your own file for analysis.