Malicious PDF — malware analysis report

Static analysis result for SHA-256 c94f2c1f1dd7aabc…

MALICIOUS

PDF

74.3 KB Created: 2021-02-26 04:55:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 7ecdd7b794a783cab24d6ca85af93051 SHA-1: c0de60219e5e2f244cd0a6092aab9405c9a1439b SHA-256: c94f2c1f1dd7aabc9ddaf3a49363e5b3462536a01a3b3b7ee9715994defd1d15
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links pointing to disposable domains and known malicious redirectors, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious redirector pattern, likely leveraging embedded JavaScript to facilitate the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 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.
  • 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://crophysi.ru/strik?utm_term=how+to+find+number+of+electrons+to+fill+outer+shell In PDF document text
    • http://girlsbeach.space/25225888524bzztz.pdfIn PDF document text
    • http://winsbig.space/zobesadatuzazamasujinicsdhz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469638/normal_60365cc7c375f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416656/normal_60362f96150de.pdfIn PDF document text
    • http://new-volosi.ru/febewilixuwulibugkaspk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457561/normal_5ff2641363db5.pdfIn PDF document text
    • http://circus.market/lagu_salah_apa_aku_uyeshareo9849.pdfIn PDF document text
    • http://idealslim-ordina.site/nonizefopexp1qf0.pdfIn PDF document text
    • http://vashmaster.info/tojawix44o8o.pdfIn PDF document text
    • http://wwbook.org/true_detective_script_writer9qaok.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369511/normal_6006bca66024c.pdfIn PDF document text
    • http://originalhallyu.com/36852112827dptsm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419818/normal_601571a857c04.pdfIn PDF document text
    • http://catsism.com/36906582863fzqr6.pdfIn PDF document text
    • https://dijekoko.weebly.com/uploads/1/3/5/3/135315120/zavob.pdfIn PDF document text
    • http://ubzvp.com/penizabogafozafu0t1.pdfIn PDF document text
    • http://osmosiotzs.fun/fozugujinurejijebawisitotufwwx.pdfIn PDF document text
    • http://help-feedback-amzn3.xyz/bullet_journal_method_freeef80e.pdfIn PDF document text
    • http://uablog.website/268022844267cz4l.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e63f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63F 5244 bytes
SHA-256: 0ed7c4e9c0bc4dc85e3b023e7bfb8dcfd8c158a4dbfede679ebdaf8df258d561
font_01_sfnt_off0000f800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF800 10380 bytes
SHA-256: 16e0bf5f27b4488f59aea43a37358c8535840fcbb8c1e02170c992bd9f79a85e

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