Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6f1b4b9b58c9d47…

MALICIOUS

PDF

77.4 KB Created: 2021-02-24 13:00:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: dedf40803f3aebcace854f7601025a66 SHA-1: b0b3787998363781d9b687f512b2d37fab5c0526 SHA-256: e6f1b4b9b58c9d47423b2fe63dd7eaace6fb5405e625eca4e4e1a0df9238c4fe
184 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, many of which point to disposable domains or known malicious redirectors. The primary goal appears to be directing users to potentially harmful websites, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics. While no scripts were explicitly extracted, the nature of the embedded links suggests an attempt to lead users to phishing or malware distribution sites.

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 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=creating+a+flowchart+in+word+or+excel In PDF document text
    • http://online-bestshop.xyz/palatesovafeio87f.pdfIn PDF document text
    • https://cdn.sqhk.co/posukomokufi/vjcEjbk/anger_of_stick_1_mod_apk_home.pdfIn PDF document text
    • https://vivexizakodol.weebly.com/uploads/1/3/1/4/131483194/bugawex_wefesakutapumu_vofemevena.pdfIn PDF document text
    • https://xokefinodoju.weebly.com/uploads/1/3/5/3/135316617/7247053.pdfIn PDF document text
    • https://cdn.sqhk.co/runetonorox/IghkCmo/adelantado_trilogy_book_three_online.pdfIn PDF document text
    • http://hyipinvest.site/nazanujejifonabfetz.pdfIn PDF document text
    • https://nerilumasufut.weebly.com/uploads/1/3/1/4/131437044/novuwo.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/vovuzize/5389403064.pdfIn PDF document text
    • http://masekafisixovok.epizy.com/haleiwa_hawaii_surf_report.pdfIn PDF document text
    • http://xupafokivudaked.rf.gd/47432160041.pdfIn PDF document text
    • http://kegotetebam.epizy.com/sasisiturowonatobomeso.pdfIn PDF document text
    • http://tofaveme.epizy.com/fordlandia_reading_answer_key.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_off0000f24c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24C 5168 bytes
SHA-256: 5a104ece9aa79d2812fab1812ad68ad32edf0f0b271403e39bda26515aede031
font_01_sfnt_off000103f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F5 10704 bytes
SHA-256: 492d861d5a1e2b99c8c72a0ae846b9806bc6e52289515474608e28f2663e428d

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