Malicious PDF — malware analysis report

Static analysis result for SHA-256 35d39e42602a212e…

MALICIOUS

PDF

78.7 KB Created: 2020-11-17 14:48:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 83a9e427cc90338b4be9112534068567 SHA-1: ddd97809b13bc3e878d39a97d5df3a1546647dfe SHA-256: 35d39e42602a212e06b077526ad5565b1ce80def86530a24fb3969a2094fe5fe
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://traffnew.ru/strik?utm_term=obras+de+caridade+de+messi PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4372361/normal_5f981b1059f19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479462/normal_5fb333ecae21b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366350/normal_5f8e6c319ebfd.pdfIn PDF document text
    • https://vuwejugo.weebly.com/uploads/1/3/4/3/134309576/8943716.pdfIn PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/6294629.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384463/normal_5fa73a0f1bdf7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366374/normal_5f87b2a8cd081.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371508/normal_5f891016a2286.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426974/normal_5f9ac95827fe0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426944/normal_5faf31628bb57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372735/normal_5f989aa7a14d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378620/normal_5f8dfb5c469da.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/b141d9b7-ef42-4fc7-9b39-46a732f7965d/5655682301.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE68 5220 bytes
SHA-256: 7386eb9a46ac6bd6005bf77c2d24adbe6ec27c026443705219942682815480fb
font_01_sfnt_off0000dffc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFFC 3120 bytes
SHA-256: fde507d3e12ec33e68adf7e75fc7402ffd28b0db1492fb6dd1e3c49ab7b9519b
font_02_sfnt_off0000ec81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC81 13532 bytes
SHA-256: f03f8306ac5fac60c271b8d6f803b0deff5f15aadadf2e365349d087cd399a1f
font_03_sfnt_off00011694.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11694 16080 bytes
SHA-256: 8f6ddafd3b0ce2004b9503adf603897a58143e210ca714e8dcfcba1b249cf112

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