Malicious PDF — malware analysis report

Static analysis result for SHA-256 49fb717dd546d886…

MALICIOUS

PDF

90.3 KB Created: 2020-12-09 08:06:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f2b22e720467b7058e30ad449eb11d26 SHA-1: 538c47aa23d49cf79cc80551e5c932647df67c31 SHA-256: 49fb717dd546d886f83ac3173bb4cc96bc87049b3d8c0d9f561d68ededb3217d
222 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an invoice-themed lure. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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.
  • 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/strik?utm_term=www.afip.gov.ar+factura+electronica In PDF document text
    • https://mawajajapok.weebly.com/uploads/1/3/4/3/134353668/xipelagexo_reduselaziwo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469119/normal_5fab3d3a19574.pdfIn PDF document text
    • https://vixijusodu.weebly.com/uploads/1/3/0/7/130776714/ce28e1776525.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414695/normal_5fb2f54f1de99.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/5fbce344be7cfc36344e8aaf/t/5fbf5730173fb5383b99559b/1606375219662/boots_of_haste_pathfinder.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc93b300-2f1f-4a69-b942-a525595c7fe4/breakaway_lyrics_celine.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc53c8cab79f442f245fbca/t/5fc84400e101942bf76a5dd6/1606960130898/93985287475.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2f978f9866f3fd2e1c9ef/t/5fc9b245e4017829c168031e/1607053893605/puvoloxeferonobetemifowiz.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc52fda8139af037661153e/t/5fcaa4c1e0f9ce029d0968a4/1607115969758/73938631003.pdfIn PDF document text
    • https://s3.amazonaws.com/wanalovum/repamivodinisolef.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d96ebd14ff0dd29c6608/t/5fc1f4d9f8cdb769c6294112/1606546650307/suwujadudosejub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f5b54ba-0ac4-4798-a91c-595cd6efd7aa/pogomegira.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a98eb42-7c35-4646-aca9-53de9db91332/64157809358.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/541c8d5f-8494-4374-b7cd-2d21e9ab6826/hp_envy_4516_review.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_off000126a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126A4 5204 bytes
SHA-256: f8d4f3b909b3a82b17caaf943b539063a18130875fae1680a962254ae65c7612
font_01_sfnt_off00013896.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13896 10628 bytes
SHA-256: c41bde624a10b2b3a91e2bd7eb8aee29f3bc395713044591223d3b3a412c6851

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