Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f6c5ae7547b84e0…

MALICIOUS

PDF

79.3 KB Created: 2021-05-29 10:42:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e5c9a60bee6e72f83e50986b1ce1febb SHA-1: 10fe604b5b47f4b21cc261a791ee4e811656859b SHA-256: 4f6c5ae7547b84e08655f1552d689556f0e5797f8245d4b99f8b7d08908e2bce
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 0.9994

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://druttle.ru/strik?utm_term=que+alimentos+tienen+lectinas PDF link annotation
    • https://static.s123-cdn-static-d.com/uploads/4489850/normal_60b1e4849d78a.pdfIn PDF document text
    • https://fopilifufisi.weebly.com/uploads/1/3/6/0/136055159/puzutodulumuwobujuz.pdfIn PDF document text
    • https://mojipolizu.weebly.com/uploads/1/3/4/3/134318612/65f11df130a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390660/normal_5ff434034e524.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492892/normal_5fccc32873001.pdfIn PDF document text
    • https://sududonoli.weebly.com/uploads/1/3/4/9/134902305/tanorirokopix-moputiwawena-nudapoxike.pdfIn PDF document text
    • https://defavelusanopef.weebly.com/uploads/1/3/5/3/135345674/viwojuvawedajir-xejaxijida.pdfIn PDF document text
    • https://barezixajeg.weebly.com/uploads/1/3/4/3/134318527/4792890.pdfIn PDF document text
    • https://jutixabit.weebly.com/uploads/1/3/4/0/134017524/rupapoxoromuluv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426832/normal_6005d5ee724a1.pdfIn PDF document text
    • https://babaketejo.weebly.com/uploads/1/3/5/3/135304919/vozegen.pdfIn PDF document text
    • https://vufegolafo.weebly.com/uploads/1/3/0/9/130969987/vuvomagurupojezibow.pdfIn PDF document text
    • https://bixemasabomevis.weebly.com/uploads/1/3/4/5/134517571/a05c27918a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376087/normal_606377ae9b61d.pdfIn PDF document text
    • https://bubejeji.weebly.com/uploads/1/3/4/3/134367045/pejemarur.pdfIn PDF document text
    • https://bopunesarikimar.weebly.com/uploads/1/3/1/4/131453984/fuxakikifuwexekotu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370288/normal_5fe3934c4e634.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388285/normal_5fef1aab2cee1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444356/normal_6010624804166.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455176/normal_60078c88eadb9.pdfIn PDF document text
    • https://zoxogonufi.weebly.com/uploads/1/3/4/9/134900606/dobuviruguruze_sidanevif_sowebarojuvul_gesidileni.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9310cd6-b0dc-46f4-b4c0-3010f2e91291/vaziranobetilafafugav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63bed0fc-3687-4783-b383-47698134f895/fusionner_2_fichiers_en_un_seul_mac.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_off0000f824.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF824 4908 bytes
SHA-256: a468b43a71bfb09b9ee7dd8bf14928bc5ec605c7d8378ce3e64de199df6ccf73
font_01_sfnt_off000108c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108C9 11592 bytes
SHA-256: 69bf9d5a1687c7a9f35efb72b3343c36d19c6d1e8ed4d42f192f8b3debffebb6

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