Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eedea3422ba9ae5…

MALICIOUS

PDF

77.4 KB Created: 2021-03-12 01:33:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 8fc3eddb5b157af89f775e9629e0f483 SHA-1: c9271d00a63591d9efe96275c0e34aa5f816eab5 SHA-256: 3eedea3422ba9ae532e673d799de4dbbd895be8de1a77d38b730a7f629140ff6
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier as malicious. It contains multiple embedded URLs, with a primary focus on https://baarspo.ru/award?keyword=addition+to+remarks+exercises+pdf, suggesting a phishing or credential harvesting attempt. The PDF structure and the presence of numerous links indicate it's part of a link farm designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://baarspo.ru/award?keyword=addition+to+remarks+exercises+pdf PDF link annotation
    • https://cdn.sqhk.co/noxutuvixi/dGcPPha/43538998995.pdfIn PDF document text
    • https://liloxowilobo.weebly.com/uploads/1/3/4/2/134265539/lomodulujuxoxa.pdfIn PDF document text
    • http://geniputan.66ghz.com/los_angeles_rams_injury_report_today.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486220/normal_5fca967546c45.pdfIn PDF document text
    • https://cdn.sqhk.co/rarinuva/eh1RXdX/mini_pigs_for_sale_in_texas.pdfIn PDF document text
    • https://bidekefit.weebly.com/uploads/1/3/1/6/131606331/9463368.pdfIn PDF document text
    • https://cdn.sqhk.co/gotuxixovumu/dNpDmcU/minecraft_java_edition_or_windows_10_2020.pdfIn PDF document text
    • http://nesakud.mypressonline.com/zugebisuzodapa.pdfIn PDF document text
    • http://kurametugugu.mygamesonline.org/64708607615.pdfIn PDF document text
    • https://cdn.sqhk.co/taxodisilif/Vhh7jh1/final_judgement_bandcamp.pdfIn PDF document text
    • http://jedusajinud.mygamesonline.org/81733926622.pdfIn PDF document text
    • https://cdn.sqhk.co/gabamulijawe/CsY6iaG/651867014.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416927/normal_6046addd53e9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415944/normal_5fe8d2c72054e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://lutewefopuv.rf.gd/gunirekutonemasevede.pdfIn PDF document text
    • http://jowokepo.atwebpages.com/94225323894.pdfIn PDF document text
    • http://pufawalaxovosi.epizy.com/berlin_sans_fb_reg_free.pdfIn PDF document text
    • http://bolanid.epizy.com/43931394256.pdfIn PDF document text
    • http://zisuvedo.rf.gd/zidirapi.pdfIn PDF document text
    • http://gujupikisikali.epizy.com/45751068293.pdfIn PDF document text
    • http://tudozujuxijoz.rf.gd/94787822824.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C8 5180 bytes
SHA-256: 58155cdd5c85b8fbfef35dabcb5e1bd314702203edc7ec5440e7199c516de202
font_01_sfnt_off0000f745.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF745 10240 bytes
SHA-256: c13deea6386556f76ca00868f123dd6325aee62cee45926461c9f757fcec2dc1
font_02_sfnt_off00011a4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A4F 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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