Malicious PDF — malware analysis report

Static analysis result for SHA-256 0834691c948ee0e3…

MALICIOUS

PDF

119.3 KB Created: 2021-03-18 22:12:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: ceee3c93a64057f141c8c759ae6b7336 SHA-1: 3fd54ae92dc56985975733ebca99a65bdb4be5a3 SHA-256: 0834691c948ee0e31489a00570d2a42a787630b6fe1513bb69141d031bf0658a
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to other PDFs, suggesting a link farm or redirection mechanism. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs are the primary indicators of compromise, directing users to potentially harmful content.

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://baarspo.ru/award?keyword=brave+new+world+pdf+summary PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4484814/normal_5ff182c926a48.pdfIn PDF document text
    • https://vepazigomopu.weebly.com/uploads/1/3/4/3/134398405/8108401.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503525/normal_60525dfc40f91.pdfIn PDF document text
    • https://loribipusav.weebly.com/uploads/1/3/1/3/131379532/rifuvo.pdfIn PDF document text
    • https://vetepoxep.weebly.com/uploads/1/3/5/3/135302771/1960650.pdfIn PDF document text
    • https://gejidodedawo.weebly.com/uploads/1/3/4/0/134018108/judamegagat.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382418/normal_5fdf2a1fcda69.pdfIn PDF document text
    • https://nabebumiz.weebly.com/uploads/1/3/1/4/131452902/6255579.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378846/normal_5ffc582733a3e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449777/normal_5fccfb6349a63.pdfIn PDF document text
    • https://nebofubegifeso.weebly.com/uploads/1/3/1/4/131437549/7086939.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390381/normal_5fcaeb8f4807a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zulezov/pozezavado.pdfIn PDF document text
    • http://finubovuputok.epizy.com/futusapav.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/next_fleece_bed_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/what_is_the_structure_of_a_paragraph.pdfIn PDF document text
    • http://kolofagigetu.epizy.com/11350212192.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/51041701695.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001875d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1875D 5244 bytes
SHA-256: f8630cff37e64aaf9792e7dfd56e7b8fe48685e36fa7e704c10120180f7b64c8
font_01_sfnt_off00019928.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19928 12540 bytes
SHA-256: 48ab754f8fe02f9b31ace1d3999596ce6b06c13ce689be233b359ba375b58c72
font_02_sfnt_off0001c1b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C1B6 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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