Malicious PDF — malware analysis report

Static analysis result for SHA-256 e231e8d14f8288a6…

MALICIOUS

PDF

68.8 KB Created: 2021-01-03 12:33:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 16cadca800b1868cf92d08d3754f79c2 SHA-1: 2a19bd74a6d2d5e1109ea51d868525effbd785b4 SHA-256: e231e8d14f8288a6464f6a2721f2916602982070b231d0d9927aaf6e0c2407cd
162 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The SE_INVOICE_LURE heuristic suggests the document's content is designed to trick the user into clicking the link. While no scripts were explicitly extracted, the ML classifier and ClamAV detection strongly indicate malicious intent, likely involving a phishing or redirection scheme.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://traffmen.ru/aws?utm_term=payment+request+format+in+word In PDF document text
    • https://cdn.sqhk.co/butiluluvuk/ji0PGeD/bemalupiwibopuxapofupaj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374978/normal_5fe3614fc8ac8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467274/normal_5fcef3c55934e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391624/normal_5fe5104cb9eda.pdfIn PDF document text
    • https://cdn.sqhk.co/mojikeke/jdSiMsM/72587245318.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368989/normal_5f8c9b576350b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378405/normal_5f8d89ef9bdcf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366047/normal_5fda3fba742f4.pdfIn PDF document text
    • https://cdn.sqhk.co/gikunixa/gxSm9je/3166255523.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372101/normal_5fca94cac954d.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
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c560.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC560 5224 bytes
SHA-256: 2798570d8ed412b066621eef91e9e820a63d0b1cc334b74532b1ab27a9f91534
font_01_sfnt_off0000d719.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD719 9820 bytes
SHA-256: 0d92e9dfa395bfe9572ea51f360588f613633e1f5aeb4f7b2060070c3246e498
font_02_sfnt_off0000f89b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF89B 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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