Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a418397e9628548…

MALICIOUS

PDF

115.3 KB Created: 2021-02-16 04:23:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c4b797a072e4e9898ec5498242a68c2c SHA-1: efbb9d4fed5b5fd296960f23ecfbb54511241608 SHA-256: 3a418397e9628548c538127ddbe96210883048eb0618827d781182148331e99f
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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://crophysi.ru/strik?utm_term=the+count+of+monte+cristo+chapter+35+summary PDF link annotation
    • https://mipajadotafev.weebly.com/uploads/1/3/2/8/132814286/depilunalaxukava.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502870/normal_5fea1bcc18d4c.pdfIn PDF document text
    • https://vopobibipudo.weebly.com/uploads/1/3/4/6/134620476/a4f69ecaea5e.pdfIn PDF document text
    • https://cdn.sqhk.co/pubodegosog/bzhj2cV/51899391597.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kuboki/capitalism_without_capital_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/hotstar_premium_account_cookies.pdfIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/51488314177.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/edit_this_cookie_chrome_extension.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/31032725835.pdfIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/25270322211.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/royal_mail_envelope_size_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/sworn_affidavit_format_kea_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/lekadevunubamejefufu.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/gerd_guidelines_2017.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000189bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x189BD 5560 bytes
SHA-256: 69cdd08393d9a2af3de705a024a1e1eecfd4f8ef4d3b91e7847d3a11dda6a4cf
font_01_sfnt_off00019c8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19C8A 10352 bytes
SHA-256: 5ef7054e75ec6be0f77d2ab4bc05c084e127654091f49f1dc02377e5114046bd

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