Malicious PDF — malware analysis report

Static analysis result for SHA-256 e814acd9f22b4b8c…

MALICIOUS

PDF

76.4 KB Created: 2021-03-03 08:47:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 38add3b075a2cad8fb528fbd94fc0517 SHA-1: f65f1cb3bed7045ac083bd81c7831c01b209e28b SHA-256: e814acd9f22b4b8c31169b93994027f11c3f2847d4e5d41720bfcffcd820ac14
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary focus on 'https://xezojetit.ru/strik?utm_term=settlers+of+catan+card+game', indicating a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further suggests malicious intent by identifying a link farm on disposable hosting. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest it's designed to redirect users to malicious content.

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
  • 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://xezojetit.ru/strik?utm_term=settlers+of+catan+card+game PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4381735/normal_5fdadebd81812.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475853/normal_600d56b158402.pdfIn PDF document text
    • https://cdn.sqhk.co/wabogojo/hdjfA3V/weedmaps_stock_symbol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418762/normal_602b224462ff8.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxonewebuke/dWVidhd/hitman_agent_47_trailer_reaction.pdfIn PDF document text
    • https://cdn.sqhk.co/xaxamipuxum/ihgelk6/silvercloud_financial_login.pdfIn PDF document text
    • http://piguzipudoval.iblogger.org/realtor_magazine_franchise_report.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416798/normal_600d5e0fc9446.pdfIn PDF document text
    • http://logemopi.22web.org/emotional_intelligence_at_workplace.pdfIn PDF document text
    • https://cdn.sqhk.co/mopomotop/h8eZ0QL/11082492670.pdfIn PDF document text
    • https://cdn.sqhk.co/ruvonusebex/fAohbif/wuwobe.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://tawatibajat.rf.gd/avenue_supermarts_ltd_annual_report_2015-_16.pdfIn PDF document text
    • http://gegukisakewomo.rf.gd/rulozusijufexitafukev.pdfIn PDF document text
    • http://bajivuselome.epizy.com/71483938507.pdfIn PDF document text
    • http://divamepirinati.rf.gd/antariksham_audio_songs_telugu.pdfIn PDF document text
    • http://lajirobodogew.epizy.com/movimiento_circular_uniforme_acelerado_caracteristicas.pdfIn PDF document text
    • http://befojarariwowab.epizy.com/75528390767.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_off0000e17b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE17B 5184 bytes
SHA-256: a0dc9f4f65830eeca137f6ec9e9558d5f23ecf51e9ba2fbec002852f744477bf
font_01_sfnt_off0000f2f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F6 10268 bytes
SHA-256: d1d88c834bca2f0720d3de35c28b36efb7b73f58d7a7bb4a864b23175bf65330
font_02_sfnt_off0001163a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1163A 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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