Malicious PDF — malware analysis report

Static analysis result for SHA-256 de4470d0b36426de…

MALICIOUS

PDF

59.1 KB Created: 2020-11-24 07:35:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: d2591abf89d27d859d98496db1dc2f45 SHA-1: 1107cc8f516a3081dbbdf6afc7bcead6665cd78a SHA-256: de4470d0b36426de201a138d3f278732c5dbb20c7c62722d47fdbe00fa900bf7
156 Risk Score

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 0.9995

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://trafffi.ru/123?utm_term=smoker+grill+combo+pit+boss PDF link annotation
    • https://sibikobibe.weebly.com/uploads/1/3/4/0/134040949/paruniwune.pdfIn PDF document text
    • https://suganolorifumu.weebly.com/uploads/1/3/0/8/130814011/54f7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369633/normal_5f8846487ff65.pdfIn PDF document text
    • https://dofazodasi.weebly.com/uploads/1/3/0/8/130873943/f8e1400.pdfIn PDF document text
    • https://munevamowiwefan.weebly.com/uploads/1/3/4/4/134440094/4709708.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e326b378-4f0c-4a06-91d2-8a490b6ac584/genijepapuxopijaworo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f46b9150-4a72-44c2-b936-0dbb834d310e/ziggy_marley_beach_in_hawai.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e3389ec-846a-490a-99f1-229dbc4fc440/23034542321.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/10254291894.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/crack_ielts_in_a_flash_general_reading_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13bd78b5-2dfd-4bda-96ce-5f08682fb1f6/43722271257.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_off0000aa4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA4E 5348 bytes
SHA-256: 9a2da2a2e996e2344c1ae7dc0a9042171b5e17ba90e34ad81958547bebe17012
font_01_sfnt_off0000bc71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC71 10108 bytes
SHA-256: 6f3794a7098ed10186083dac99c7a86ff26e81ebdbb05405b0af262a2c29d57c