Malicious PDF — malware analysis report

Static analysis result for SHA-256 f13fd02b858ea333…

MALICIOUS

PDF

69.6 KB Created: 2021-01-16 12:19:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 5916a975d639b74d30a0915a5e0e4837 SHA-1: 96c507615a7dd8c7459b7e4a5dfb3b4063d2a5bb SHA-256: f13fd02b858ea3334240fab271288815123daf7a6ba51ce861d07434874d9641
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, identified as a 'link farm', suggesting a phishing or SEO poisoning attack. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards an attempt to redirect users to potentially malicious content.

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
  • 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://trafffi.ru/123?utm_term=funny+car+stickers+nz PDF link annotation
    • https://xuremesedadewo.weebly.com/uploads/1/3/4/5/134500919/20e6d3.pdfIn PDF document text
    • https://site-1166064.mozfiles.com/files/1166064/31236856189.pdfIn PDF document text
    • https://site-1242615.mozfiles.com/files/1242615/makanakoxavu.pdfIn PDF document text
    • https://site-1178383.mozfiles.com/files/1178383/report_twitter_account_inactivity.pdfIn PDF document text
    • https://site-1178803.mozfiles.com/files/1178803/flip_diving_download_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449605/normal_5fda97c468821.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469828/normal_5fc716106e38b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zetituri/sezowalajofigupoxur.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/aws_cloudformation_azure_equivalent.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/chello_divas_2_full_movies.pdfIn PDF document text
    • https://s3.amazonaws.com/wozoxub/gantt_chart_with_excel_template.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/equivalent_fractions_worksheets_ks1.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/cbre_property_report_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/human_development_questions_and_answers.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3C3 4932 bytes
SHA-256: 82dc99b82732ccd40342c15fedf899b1bf9cfe0c8bab9c8f6af04ac540b47387
font_01_sfnt_off0000e4ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4AE 10824 bytes
SHA-256: 24eab6f23a6ffdad42363cda48a7d271261ecc6a66ce10a7b8d2059932cbfcae

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