Malicious PDF — malware analysis report

Static analysis result for SHA-256 d57c9280c17368a2…

MALICIOUS

PDF

74.3 KB Created: 2021-02-13 18:47:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ac560992712cc73b976ff7252cbc6974 SHA-1: 5c1c9ede06ed29af40daf25f84c173bb481f2e4f SHA-256: d57c9280c17368a210ed9359f00b0817bde241d68b37fc746881dbd5791973a6
186 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 0.9998

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://jacksth.ru/123?utm_term=i+have+seen+the+eternal+footman PDF link annotation
    • https://wepusiviji.weebly.com/uploads/1/3/4/6/134661614/kopivojuvamisaxej.pdfIn PDF document text
    • https://menudobuwowewil.weebly.com/uploads/1/3/4/7/134765252/wufotopixikev.pdfIn PDF document text
    • https://sesoramin.weebly.com/uploads/1/3/2/6/132681885/likuvajebi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464525/normal_601dd62038174.pdfIn PDF document text
    • https://deperomider.weebly.com/uploads/1/3/4/3/134344929/tenux_fasabop.pdfIn PDF document text
    • http://matras-24.ru/85662774389wtzab.pdfIn PDF document text
    • https://dovejopizodumu.weebly.com/uploads/1/3/4/8/134883147/1493158.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371261/normal_600bf6fb159fd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367286/normal_5ffbd724b793d.pdfIn PDF document text
    • https://kojivijagidisu.weebly.com/uploads/1/3/4/0/134042347/zokafo.pdfIn PDF document text
    • http://sifulodidikit.22web.org/25686624175.pdfIn PDF document text
    • http://carishr.com/545098603430vbml.pdfIn PDF document text
    • https://xuvurabog.weebly.com/uploads/1/3/2/6/132696285/jorewomatifigiwa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sivopumifivak.epizy.com/kia_sportage_2017_reviews_consumer_reports.pdfIn PDF document text
    • http://tokofelutuj.epizy.com/diploma_electrical_engineering_interview_questions_answers.pdfIn PDF document text
    • http://luwulifinuneti.epizy.com/mailchimp_edit_template_content.pdfIn PDF document text
    • http://devimetoto.epizy.com/13213784140.pdfIn PDF document text
    • http://kalotiwinilobiw.epizy.com/donuxuseviduluzolalat.pdfIn PDF document text
    • http://gopivikanofo.rf.gd/5655729710.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_off0000e85d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE85D 5004 bytes
SHA-256: eeba7c2402e51875d2f64c8a8ac417e72326f2ac657516ba24b6ba80ad5d745d
font_01_sfnt_off0000f93b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF93B 10208 bytes
SHA-256: 4adab5fbd9fa87b616000ed5a263b79875db3d64bb2893b5f67f41f3eda5ce27

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