Malicious PDF — malware analysis report

Static analysis result for SHA-256 badca1dd66d50f85…

MALICIOUS

PDF

65.9 KB Created: 2020-11-17 02:33:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 8b58add54e39d36c2aef961ff40f8e3d SHA-1: 2658b2bd50cde494706b67a19d198f5e45ac92eb SHA-256: badca1dd66d50f852a4c063430caee99dd48895d23f7aa0da28de339fa48cff8
156 Risk Score

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 0.9981

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://traffine.ru/strik?utm_term=download+songs+of+babul PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383679/normal_5f8d98500f347.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380084/normal_5f94a458c5e55.pdfIn PDF document text
    • https://wudajelenap.weebly.com/uploads/1/3/4/4/134470879/rofufatar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381529/normal_5f9c09d1980df.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/f0746df6-8cc9-4409-8afd-73b33344768b/14187081496.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18ee6de0-82dd-4cfe-a29e-3b21f7794237/lasuruliwunabu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6583ed4-9e6c-43b8-a733-c216443593e2/the_cove_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a6eb0a2-b938-4b31-a223-22f09b660846/9929768697.pdfIn PDF document text
    • https://s3.amazonaws.com/rakonezum/lidijewezomobi.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_off0000c709.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC709 5212 bytes
SHA-256: ff2b13b01a1a358b84e250038eb1d7135ebdf549a0b5fa22055be82bec212b39
font_01_sfnt_off0000d8f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F5 10000 bytes
SHA-256: a915247aedbc21cfcf74a1c3dd58fb423a78c80af091c249a73ba43120f377ea