Malicious PDF — malware analysis report

Static analysis result for SHA-256 04442df042bd834a…

MALICIOUS

PDF

84.6 KB Created: 2021-03-22 21:24:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e460073b00a99f1b93f6da03a87bfc6d SHA-1: b0c539e4b0273233feb32f0e6b3b716b75f5a135 SHA-256: 04442df042bd834a35419817a654eb26b0fbbca8dc9a1b071e1f15defa2d7cc3
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://golowaki.ru/wix?keyword=ionic+bond+formation+worksheet+answers PDF link annotation
    • http://bisipatelaloguj.66ghz.com/geloposawemamewo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459470/normal_5fe1eb544778e.pdfIn PDF document text
    • https://regagilozot.weebly.com/uploads/1/3/1/8/131871395/fe2686d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485695/normal_5fef367762f5c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451551/normal_5ff91f9480959.pdfIn PDF document text
    • https://bolubevegu.weebly.com/uploads/1/3/1/4/131454373/rexefaze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367622/normal_602856ae55649.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487894/normal_604dd8f95861d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412768/normal_5ff769e422299.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490265/normal_5fcb1b1c8cfb1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8ca15cf9-c5bf-4329-906a-32df3c7b5ab7.filesusr.com/ugd/4ca7f5_e213ccd488e64951a2a7cb5ca9d3eb6e.pdf?index=trueIn PDF document text
    • https://0491f86b-060d-4f4a-be23-b0d01488777f.filesusr.com/ugd/faa7ef_78ff4870fbda4a23a2688cbce536c924.pdf?index=trueIn PDF document text
    • http://posijibanif.epizy.com/family_tree_template_visio.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/beginners_running_guide_for_weight_loss.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/kelly_services_careers.pdfIn PDF document text
    • http://bonubenevutura.epizy.com/26192974629.pdfIn PDF document text
    • https://2065f6f1-29fb-48ac-a230-4f4ab2d4b746.filesusr.com/ugd/b62953_226f31a526d843ff922a1cb81fbb7abf.pdf?index=trueIn PDF document text
    • https://3cd6846c-369c-4875-9c63-132df726a2dd.filesusr.com/ugd/7ab50f_42d799ffb7354a2e954254b66145bc13.pdf?index=trueIn 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_off00010f61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F61 5460 bytes
SHA-256: badff9a3cc4d373c1699638151ebb11c35676c154dc6bfe9fd69bf2ce0c69ace
font_01_sfnt_off000121d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121D8 10376 bytes
SHA-256: f9f9a4b5419ff1e4231ceb9876b178896b94a25440d3e0b9e86968764a9242d8

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