Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e570931c4fbff89…

MALICIOUS

PDF

68.0 KB Created: 2020-12-17 00:06:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 24d318c02c7e261f25f0b0681b2e66f8 SHA-1: 7564902c84b83cf72518cac8a8f4cc2c68199968 SHA-256: 1e570931c4fbff8937cde6bf8f568034ccd009c8c54932cc3ede0b8a8be935bd
194 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and a significant number of external links, many hosted on disposable domains, indicative of a link farm or phishing campaign. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious content or phishing sites. The embedded JavaScript may be used to further obfuscate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=normani+waves+tidal+performance PDF link annotation
    • https://sufewusog.weebly.com/uploads/1/3/4/6/134644796/kajipesinusivivil.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/3257372.pdfIn PDF document text
    • https://fizakisel.weebly.com/uploads/1/3/4/4/134402115/pewugezalanan.pdfIn PDF document text
    • https://kawifapexevudo.weebly.com/uploads/1/3/4/7/134711131/pakefan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470677/normal_5fabdb79c9c37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448735/normal_5fb99b942cfb8.pdfIn PDF document text
    • https://migufakugiguxob.weebly.com/uploads/1/3/4/5/134579218/c60b41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492250/normal_5fab794c9091a.pdfIn PDF document text
    • https://zufesuvagudinaf.weebly.com/uploads/1/3/4/3/134321689/957160c1a6f.pdfIn PDF document text
    • https://rarikomedos.weebly.com/uploads/1/3/4/6/134616559/665ece.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/5fc0ec6c8787e879896c16ae/t/5fc8b8afb0f45b2a3d2c378e/1606990004137/98026913528.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc586ba2bbd74065825e57e/t/5fc9dacee4017829c16c9005/1607064272511/49941704685.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_off0000cae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAE1 5420 bytes
SHA-256: f2d389cf166391201ef16c19e14ca3e8ffce68c0eca323d1efbc42eb0af77981
font_01_sfnt_off0000dd55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD55 11588 bytes
SHA-256: 83cd2c9db1178a02b52483b34d89a19b54b0bd722ccabb04b17fd2d1704d38ee

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