Malicious PDF — malware analysis report

Static analysis result for SHA-256 4459f2be3358d761…

MALICIOUS

PDF

72.1 KB Created: 2020-12-02 00:31:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ec6f5be6cef7427196ba3250f115e993 SHA-1: 218c011594c8cf6fd9dd2b5d8f8c92d35e232508 SHA-256: 4459f2be3358d7614db42eeb36032f93e1e59f8066e2df99a6e0f1a301d49610
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 0.9997

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://trafffe.ru/strik?utm_term=designer+perfume+recipes+using+essential+oils+pdf PDF link annotation
    • https://pevigegokepos.weebly.com/uploads/1/3/4/3/134366184/jizekun_wibunakaganus_lumesokebokuxid.pdfIn PDF document text
    • https://fubomagasikeka.weebly.com/uploads/1/3/4/4/134474343/nosirebanumodiru.pdfIn PDF document text
    • https://vijativu.weebly.com/uploads/1/3/4/5/134597759/b7061db1.pdfIn PDF document text
    • https://rajuvafawomok.weebly.com/uploads/1/3/4/4/134455823/lofilat.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/5fbe0833eaf37e3b6462bfb2/1606289460720/a_word_that_starts_with_r_to_describe_someone.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/deconstructivismo_arquitectura.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1976bb8467722f1d927cd/t/5fc406b1f8cdb769c660d757/1606682291439/39206224184.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d67b8ef7301f8b106140/t/5fc1d9f47acac6192a04bd11/1606539766585/pemofodaj.pdfIn PDF document text
    • https://s3.amazonaws.com/tekujel/bobomiredaze.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc395d1c6229360ecbdc211/t/5fc548d57acac6192a6fb14e/1606764758486/desirulez_star_plus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a67ace9f-4cdf-4722-a835-e8084ba81a16/65875497403.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2b42eab79f442f2353307/t/5fc55e053570fb44d1b63671/1606770182819/xasekeguvatiduxoxolip.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_off0000ddd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD3 5476 bytes
SHA-256: 15ebfdd8e846b229d0ce38567cdba06b399b1e05654671e2902229e379f8a82b
font_01_sfnt_off0000f05f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF05F 10284 bytes
SHA-256: 8eca2f0851a91b82c428d381ad0c3b83d7f03aacea020d9fec132caaca852669

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