Malicious PDF — malware analysis report

Static analysis result for SHA-256 05e2ed7ee0583518…

MALICIOUS

PDF

75.1 KB Created: 2021-06-02 17:26:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a07525b43dbfce8c43c7ed8fe1503b0d SHA-1: 106e7289557fdf499067a5a6ffefe6fac6be0dbe SHA-256: 05e2ed7ee0583518f8309d732461d129f08b9fbfe0e8f65d2de1de65327e9355
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://leonvi.ru/123?utm_term=excel+copy+conditional+formatting+to+all+sheets PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4482405/normal_601263573367b.pdfIn PDF document text
    • https://bavazaje.weebly.com/uploads/1/3/4/3/134335981/wenulepapekipi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415745/normal_601046ed97ac0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387925/normal_606247ec5761d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462376/normal_6015e90d7d9fe.pdfIn PDF document text
    • https://labaveboto.weebly.com/uploads/1/3/4/6/134611097/6460826.pdfIn PDF document text
    • https://zodoxofavuzawa.weebly.com/uploads/1/3/1/4/131437464/4446034.pdfIn PDF document text
    • https://zesedigun.weebly.com/uploads/1/3/7/5/137512011/3783177.pdfIn PDF document text
    • https://zuxevuzefadum.weebly.com/uploads/1/3/0/7/130775429/974690.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471688/normal_60171423df281.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4377128/normal_60aff1066b30d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375088/normal_603f801ea0602.pdfIn PDF document text
    • https://zalawevovupat.weebly.com/uploads/1/3/0/9/130969727/zivajuvuzuxav-misamofuvodak-samokor-didusi.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/05562b5b-b9ed-41a1-bfde-2f7eec410fbe/mabafabejumufakes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec878016-65da-422e-8cda-10773b00a868/3101297529.pdfIn PDF document text
    • http://lekipirunezi.pbworks.com/w/file/fetch/144427926/65432458845.pdfIn PDF document text
    • http://jolowajuwijo.pbworks.com/w/file/fetch/144507210/solids_liquids_and_gases_homework_year_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc63da5c-33de-4428-a4a8-a859f14da5bb/10545162879.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b91fba8-8b9f-42d2-a57c-492d38cb52ea/rulilakebidep.pdfIn PDF document text
    • http://pajinap.pbworks.com/w/file/fetch/144499674/calculus_volume_2_apostol.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_off0000e80a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE80A 5696 bytes
SHA-256: d62ff631ec83500b68906c87038f95c6270b8a8b86006fd04d2ee380f3bf9e71
font_01_sfnt_off0000fb56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB56 10464 bytes
SHA-256: 132fd4723b86be8e4fbfa2f134678945ab3052e12c41c4943aaf8a7e97d89d21

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