Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eebcb3b0f095c01…

MALICIOUS

PDF

71.4 KB Created: 2021-06-05 07:27:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80ab5366c3d9e8c77067420fa515d16c SHA-1: 269347d8695e512d98daf1fbc1daa0e6be0e4602 SHA-256: 2eebcb3b0f095c016f866ef6daee97cb7e1f8e65b840fdac3eba9e6c98b99967
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or redirection scheme. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

Heuristics 6

  • 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.
  • 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 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://crysiq.ru/pbw?utm_term=%25C3%25B6%25C4%259Frenme+psikolojisi+%25C3%25A7%25C4%25B1km%25C4%25B1%25C5%259F+sorular%25C4%25B1
    • https://vodunifowabot.weebly.com/uploads/1/3/5/9/135992931/6c27f9e.pdf
    • https://sileperu.weebly.com/uploads/1/3/1/4/131406390/2069586.pdf
    • https://static.s123-cdn-static-d.com/uploads/4458122/normal_60afff90500ea.pdf
    • https://vatawasuri.weebly.com/uploads/1/3/3/9/133997312/wuxamo.pdf
    • https://gabejopow.weebly.com/uploads/1/3/4/5/134597712/gefimo.pdf
    • https://xujuwoxevosu.weebly.com/uploads/1/3/4/8/134896670/1cd53412f0f2101.pdf
    • https://wikukexinuxox.weebly.com/uploads/1/3/4/3/134349372/xinigeburuvolerikav.pdf
    • https://zefopezonokav.weebly.com/uploads/1/3/1/3/131398054/9550109.pdf
    • https://bivufinemena.weebly.com/uploads/1/3/1/3/131380184/sipiribagotetizisid.pdf
    • https://javodamujuwevef.weebly.com/uploads/1/3/4/4/134446411/8742578.pdf
    • https://static.s123-cdn-static.com/uploads/4501775/normal_5ffa964c73b2a.pdf
    • https://rolemefusibo.weebly.com/uploads/1/3/0/8/130814279/807188.pdf
    • https://zopixidasopotid.weebly.com/uploads/1/3/1/3/131397955/jimaz.pdf
    • https://melijavunibujov.weebly.com/uploads/1/3/0/8/130873932/xizunutit_sibimagu_lipubev.pdf
    • https://pivuwolugere.weebly.com/uploads/1/3/4/0/134041199/95c7332d.pdf
    • https://fofuxexofinob.weebly.com/uploads/1/3/4/7/134717506/tatonajano.pdf
    • https://gimazujik.weebly.com/uploads/1/3/4/2/134235519/43ee17f61.pdf
    • https://pupotebomur.weebly.com/uploads/1/3/4/7/134707076/juvuvugetep-koxidozivedin-supog-nivenu.pdf
    • https://lujuvikib.weebly.com/uploads/1/3/1/4/131406806/8d55f0507ca1399.pdf
    • https://pogugabumivo.weebly.com/uploads/1/3/1/3/131381840/pafamake-zonifede-bojowol.pdf
    • https://xirazaju.weebly.com/uploads/1/3/4/8/134859293/mawalisuxo.pdf
    • https://didefitelov.weebly.com/uploads/1/3/0/8/130874246/0e273e53.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xojifot.pbworks.com/w/file/fetch/144426228/how_to_report_a_flood.pdf
    • http://dipoziw.pbworks.com/f/loteria_del_abecedario_para_imprimir.pdf
    • http://lulimogosan.pbworks.com/f/how_to_overcome_retrospective_jealousy.pdf
    • http://zigunef.pbworks.com/w/file/fetch/144643002/jobuxurobavozazidapejeb.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d22c.bin
e97f9ccbd25b66e3b9a48da61f54c499cdb77bd2f0b9483ed839d508f6b646fb
pdf-font-stream PDF embedded font (sfnt) at offset 0xD22C 5856 bytes
font_01_sfnt_off0000e565.bin
9c525881cca454d443b5d36f28667ed420e0e792121fff8b7672e83745f28481
pdf-font-stream PDF embedded font (sfnt) at offset 0xE565 12836 bytes