Malicious PDF — malware analysis report

Static analysis result for SHA-256 be9423ebd1ab4a75…

MALICIOUS

PDF

75.0 KB Created: 2021-05-25 08:15:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fe40be4e6c1ed22cd7164d5c29c69b6a SHA-1: 1655b3c92755f10db691a6a0d119462cf7ab08f5 SHA-256: be9423ebd1ab4a7569bdd639f98d027ca747d9046db278a18c724b7a20337282
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 0.9996

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://gimoguvi.ru/strik?utm_term=donald+duck+comics+cbr+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370077/normal_601baea515b97.pdfIn PDF document text
    • https://mopebewugo.weebly.com/uploads/1/3/0/7/130776026/7046418.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373527/normal_605d9463cae24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393220/normal_602fea20580b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408004/normal_5fdc7b928f5a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387562/normal_600df5c827e96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365660/normal_604a53678de49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384035/normal_60188a118d2bf.pdfIn PDF document text
    • https://dominisu.weebly.com/uploads/1/3/1/3/131379959/92de994a47b700.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485570/normal_604937a116a01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486772/normal_600af0c3a9a84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379626/normal_6018f44b75a57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451353/normal_60516882f41a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389797/normal_5fd5f7376dcdd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445564/normal_600f3d01a8bf7.pdfIn PDF document text
    • https://rizizisexulap.weebly.com/uploads/1/3/1/4/131407181/xipax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490920/normal_604e5f44f3134.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464530/normal_603bbed076552.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486981/normal_6010adf73171a.pdfIn PDF document text
    • https://zinaxavum.weebly.com/uploads/1/3/4/3/134354277/9f58ec8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wetevali/matlab_plot_marker_type_filled_circle.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/ingles_basico_para_nios.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF5 5380 bytes
SHA-256: 13dc90d95fe1ab0997607a5ef49cb2d49a62bf3b880d937ccc29b4ad0f354211
font_01_sfnt_off0000f23c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF23C 14320 bytes
SHA-256: c281e81562056eeb6bb17888760082d3512c796c76532a06d378904ed0f385ba

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