Malicious PDF — malware analysis report

Static analysis result for SHA-256 bedda525e22b5185…

MALICIOUS

PDF

68.7 KB Created: 2020-11-28 17:41:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4efe74fd3485031bcbcad38e804d0982 SHA-1: 91b37ab925983c6f1f0f66b463379662214d2ca8 SHA-256: bedda525e22b51859bee1d1a574ac2b7df388643261f9d6fbefdf68d533d8aaa
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 0.9997

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 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://traffking.ru/strik?utm_term=monohybrid+problems+worksheet+1+answers PDF link annotation
    • https://vemewibikem.weebly.com/uploads/1/3/0/7/130776349/merenalufufavogu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385869/normal_5f8d999b0a673.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365626/normal_5f8b1d16926fc.pdfIn PDF document text
    • https://gogiwujuduk.weebly.com/uploads/1/3/4/3/134352159/2738117.pdfIn PDF document text
    • https://gudojovevisepu.weebly.com/uploads/1/3/4/3/134314990/ecb769e8.pdfIn PDF document text
    • https://senobatupubem.weebly.com/uploads/1/3/1/4/131437889/pamomimuliwowup_senimu_batetijeviv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366033/normal_5fa126f355845.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409998/normal_5f949dbb3034c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/b325b7a1-bea9-4727-bf8f-225addd8e5cf/64402508017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fd14b4b-0d96-4c96-8567-4de7d3c1c1c3/zixefur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28512b35-2a27-4c5d-9346-dd92bf40a60d/barra_de_estado_en_word.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c56a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC56A 5652 bytes
SHA-256: 2ab78c7fddcade0b4324baf9a7d6c7a9a988be76eb6db639970e8bfb0919cf74
font_01_sfnt_off0000d893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD893 9988 bytes
SHA-256: 3bc29d8bf83931e118016d03ee04ba61d5e84704c7ab18fffc51a877ae5e4f71
font_02_sfnt_off0000fac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC0 2572 bytes
SHA-256: 9b52aad0938284c28791dc8cb4deb9725b2592e5fa619bd19a03aeaad2836150

Open this report in the interactive analyzer, or submit your own file for analysis.