Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dd5cc8a53fd00ed…

MALICIOUS

PDF

70.7 KB Created: 2020-12-11 00:18:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: f50a0c52f4028eeab69ca4ba82818853 SHA-1: d3fc43ac4b6741c9f258d30aa832b018247527b8 SHA-256: 0dd5cc8a53fd00edb8a75cd8d573704703bb70b42b9790f0976085eddf72b36d
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://trafffi.ru/aws?utm_term=aplikasi+belajar+bahasa+inggris+untuk+pemula PDF link annotation
    • https://wubiwadodeta.weebly.com/uploads/1/3/4/5/134577579/3179855.pdfIn PDF document text
    • https://niwejeru.weebly.com/uploads/1/3/4/3/134308800/siwejutifub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414495/normal_5f953cccef0bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369774/normal_5f888bbb1957f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390328/normal_5fa2ee9b7065e.pdfIn PDF document text
    • https://kivofijola.weebly.com/uploads/1/3/4/3/134309380/gelemubapab.pdfIn PDF document text
    • https://bekobivovovezu.weebly.com/uploads/1/3/4/6/134608345/revebiwowufutudotube.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/5fc6de2be2afa34b64ab27c8/t/5fc8cde92dd5737571bd1388/1606995434052/20659173206.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bef5ee0f-fbcb-45ed-aa37-ca65e566b0bd/focus_of_nursing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/538261c1-c658-4fca-8434-670da158c03d/63322474270.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe0fcd9d79364840561cc9/1606291406965/pizotaru.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc66c646b97992eb5814648/t/5fd1d23e5e090321cab45701/1607586367584/kodiak_cakes_oatmeal_review.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc56d932cf09257bd8a04eb/t/5fcb578911c29807e6d79c87/1607161738036/58483817665.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81569164-f5e5-4eaa-8ce2-867de0219093/46400589231.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbac6c38-c088-4309-8e5a-03e15d1706fe/muligak.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5b0fb8139af037665d853/t/5fd2070a9a9e5443ac800823/1607599882872/wolupenuneju.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_off0000d790.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD790 5500 bytes
SHA-256: 8a048789d45037fb2a21b1d414f7296bd65a95111ac0b27a230ee525754bd18c
font_01_sfnt_off0000ea1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1C 10416 bytes
SHA-256: 6df371433babcb8a0959441e142a6ba0326c9ac991517a8192336f13055f9ef1

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