Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5eafa241ce8a64e…

MALICIOUS

PDF

80.4 KB Created: 2021-03-02 16:25:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a6fdfc5c7a9b3837bda49cad9a49fbd4 SHA-1: 3ddf2ff756fbed538162fdd3c6e0793cee9acd16 SHA-256: c5eafa241ce8a64e42f80ad3ae2a2558728b4fb8e9ffd6af3975e65c10619643
186 Risk Score

Malware Insights

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

The file is a PDF containing a significant number of external links, many pointing to disposable domains and potentially malicious hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. While no scripts were directly extracted, the PDF structure and numerous URLs suggest it's designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://nipisod.ru/123?utm_term=the+magus+ending+meaning PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4424991/normal_5fe9dac9965be.pdfIn PDF document text
    • http://lomigakorak.getenjoyment.net/netozawajuriwapebijag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391903/normal_6026101924978.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466364/normal_6005f282581ff.pdfIn PDF document text
    • http://copyrightproblem.com/sow_what_journey_in_a_bagww36o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451047/normal_602b37fe920cd.pdfIn PDF document text
    • https://bozobamawokoruv.weebly.com/uploads/1/3/4/3/134350924/08825c.pdfIn PDF document text
    • http://winoraama.space/746191016120mor5.pdfIn PDF document text
    • http://snail-case.store/different_types_of_spur_gearsflrzo.pdfIn PDF document text
    • http://pazujiz.mygamesonline.org/85294429123.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471095/normal_602a2e7f12a10.pdfIn PDF document text
    • https://lipisowuke.weebly.com/uploads/1/3/5/3/135387266/5714127.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374860/normal_5fee4e3fe8057.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/bokexizometun/mini_business_plan_template.pdfIn PDF document text
    • https://s3.amazonaws.com/lopeteb/ropiladeramoponeripo.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/worksafe_incident_report_form_template.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_off0000febc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEBC 5060 bytes
SHA-256: 5e3f1eaa61f30999728c78e7e64898b98aa80af63f8a05525bd26af660a3b276
font_01_sfnt_off00010fca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FCA 10752 bytes
SHA-256: e847b03ab2473427b0974d1e8176f3b87e2ce4c1f32612d09013e03e73e943a1

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