Malicious PDF — malware analysis report

Static analysis result for SHA-256 6142933ace1d5ae6…

MALICIOUS

PDF

83.2 KB Created: 2021-01-03 17:50:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 78b3e17fba0f8cdfd123e4f90a4baf39 SHA-1: 94d37dd47241d0b6ce812dac4169f112c9333e47 SHA-256: 6142933ace1d5ae6b14907dfff47f50cc3d914652fa06132742558145b8b3663
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains a large number of external links, many of which point to potentially malicious domains, suggesting a link farm or phishing attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffset.ru/123?utm_term=red+badge+of+courage+summary+chapter+8 PDF link annotation
    • https://ladofozaser.weebly.com/uploads/1/3/4/3/134334290/cd8876dc1.pdfIn PDF document text
    • https://munejubulogulep.weebly.com/uploads/1/3/4/2/134266186/7f4a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490128/normal_5fb3edceae57d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369671/normal_5f9958a429dde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379732/normal_5f9333002199b.pdfIn PDF document text
    • https://wivupenoremew.weebly.com/uploads/1/3/0/7/130775018/wopuz-puzusofaj.pdfIn PDF document text
    • https://rovibabewovel.weebly.com/uploads/1/3/4/8/134884015/nozuluwumagodul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455902/normal_5fc07b3180cf0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/638e4f88-2447-4514-86b9-220d678aaf58/yurok_tribe_food_for_kids.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/290c3158-507c-46de-9a1b-5e9aef4c10ce/remidadevotivediz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6c7a857-fa7a-4077-bc3b-413150c69dcf/90338673643.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06508c21-1c37-42ad-9683-e564cac3f04e/vidos_gratuites_dincest_3d.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e50363e-9490-489b-b405-f24db653ec7c/97155288954.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB2E 5708 bytes
SHA-256: 4be7415b6f873b05bf15352da3e33f23cb14cf1389f19659c34d89c50cfbc014
font_01_sfnt_off00010e9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E9C 10260 bytes
SHA-256: 1cda1584307e3fdfbceb0d35a2b5a5571f45fa29b84da61ced67136a388a08a3
font_02_sfnt_off00013184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13184 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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