Malicious PDF — malware analysis report

Static analysis result for SHA-256 490eba45bf74aca6…

MALICIOUS

PDF

80.1 KB Created: 2020-11-11 21:46:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 7b720f62c204c336c169bb3fbe2f7f5c SHA-1: 27a23885ed63df5233844bae25c5dda3fb68e7ba SHA-256: 490eba45bf74aca67c577f4b9cfab18a7fb7ace776e026256c67fca6a5106464
214 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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/strik?utm_term=minimized+cardiopulmonary+bypass+tec In PDF document text
    • https://cdn-cms.f-static.net/uploads/4457272/normal_5fa76393293bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387060/normal_5f9582fb8c506.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374178/normal_5f8fa6967af46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421939/normal_5faacc239b957.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/filosom-lusiwikafese-jerupuxorukoti-novubolifunuw.pdfIn PDF document text
    • https://zufakuka.weebly.com/uploads/1/3/4/3/134343409/lunijasumejuze-nugiwimod-kapoji-nevevedive.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474987/normal_5faa0fb0970ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377391/normal_5f8a2f2db1b9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481168/normal_5fa7dd98df998.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://s3.amazonaws.com/xelimewat/stats_final_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/musoxifuvitalo/hacked_games_agario.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/kapujagufizogujitor.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/totejexovemo.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/asphalt_9_hacks.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/java_concepts_with_examples_programs.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_off0000edfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFB 5400 bytes
SHA-256: c9e3b37ffe199008cb60a4232551f857439472f16c24228d1c66d2a92da5597b
font_01_sfnt_off00010037.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10037 11048 bytes
SHA-256: fa86d64c2e8e9f6615f9f48bc65930fb8efbada6963d9afadd4ab2933d3d417c
font_02_sfnt_off00012570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12570 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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