Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce039522bf772487…

MALICIOUS

PDF

74.5 KB Created: 2021-02-22 07:52:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d25425fe4675512549899a617f2caddb SHA-1: 96cf86c01c4a4a5a765700e2400398863144b83a SHA-256: ce039522bf77248715dbeee750cd5de3c7687d46fcbca62d883fac3aea5c1c5c
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/strik?utm_term=what+medication+is+prescribed+for+cardiac+arrest PDF link annotation
    • https://lugumeduzox.weebly.com/uploads/1/3/0/7/130740149/34bbb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426695/normal_5fc6bf2db7c23.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480581/normal_5ffdb03f0db3d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446649/normal_5fceda745d830.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483336/normal_5fdd77d875cb6.pdfIn PDF document text
    • https://josilagowuf.weebly.com/uploads/1/3/4/0/134018629/genexo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366371/normal_60203b8f6fde5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489415/normal_5fe355bd46fa3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491665/normal_5fd79a6f6c86b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458838/normal_5fed2ee1cbf2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492253/normal_5fdc702e3413e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414682/normal_600976d34baed.pdfIn PDF document text
    • https://gonufefimexej.weebly.com/uploads/1/3/4/8/134892828/zewupab.pdfIn PDF document text
    • https://kofetasug.weebly.com/uploads/1/3/0/8/130874362/6664017.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485587/normal_5ff65529ce785.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sonowodiguvab.epizy.com/sodizaxugapopekana.pdfIn PDF document text
    • http://nuwikomoxiso.epizy.com/aeroneb_professional_nebulizer_system_manual.pdfIn PDF document text
    • http://mitefunigesito.rf.gd/44593490476.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_off0000e46a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE46A 5516 bytes
SHA-256: c27373c8d076998517fd6430d165e91448f2adc6c8e965ac341c97e576715a36
font_01_sfnt_off0000f701.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF701 10900 bytes
SHA-256: e41dae829de17a6ffe04400c2cc3fb2b056589918fe95b517ddad2e90c4175a7

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