Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ebe9534e096f78a…

MALICIOUS

PDF

83.7 KB Created: 2020-12-21 01:09:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: c1e3cf671c03aa7f92f0a2297a8f64f2 SHA-1: 1987510402849bf755fa9578a086d32d7237c183 SHA-256: 9ebe9534e096f78a3b0f83b52131388862af70b0ce2a2fc8d47acbf35d6157cd
164 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains a large number of external links, suggesting a link farm or phishing attempt. The presence of a 'download button' lure further supports a malicious intent to trick users into clicking on the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffnew.ru/123?utm_term=manual+testing+certification+courses PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4381759/normal_5fd3022a1f2a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467273/normal_5fdba6f472ed5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380413/normal_5fbe9f201ad33.pdfIn PDF document text
    • https://ponixojezunuto.weebly.com/uploads/1/3/0/9/130969897/616905.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387712/normal_5fc27d955e643.pdfIn PDF document text
    • https://bitujidup.weebly.com/uploads/1/3/4/5/134598072/31f98a.pdfIn PDF document text
    • https://pebezudaxefen.weebly.com/uploads/1/3/4/3/134347708/5dda0fb33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424981/normal_5fa6ae0f332b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379839/normal_5fb3ea9192217.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491173/normal_5fc37a320c07f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372696/normal_5f8a89e16268c.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/7061675.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385230/normal_5f8dbef27f097.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc10b71bdb33045eec31c8e/t/5fc243293485235c8611622e/1606566697876/31548717661.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdfcc855fb7d01a9b0f17d4/t/5fdfd103459323513bece46b/1608503556643/connected_speech_linking_examples.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_off00010709.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10709 5052 bytes
SHA-256: 5dfe0a4c6d37c4b48ae32c8a9afb79b561f2d730919f9652d2a25d0483e005f2
font_01_sfnt_off00011858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11858 11600 bytes
SHA-256: e48dc6b2f163b2f6b1c6408986ffa1f5d3060b00edb61107729d9df0bf8eeada

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