Malicious PDF — malware analysis report

Static analysis result for SHA-256 fda64369c67c861f…

MALICIOUS

PDF

80.6 KB Created: 2021-03-19 23:06:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 970f5d96927881ae7e72e301a08dec46 SHA-1: 083daf53cbfd95786d01d8631939c1ebff5a7518 SHA-256: fda64369c67c861fb7794eb4865de1c9eec6ce012c6c7d661870935078b42c5c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 by an ML classifier as malicious. It contains multiple external URIs, including one pointing to a link farm on disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution attempt.

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://seumenha.ru/strik?utm_term=elastic+band+exercise+routine PDF link annotation
    • https://cdn.sqhk.co/xamevetap/mSHEbXB/diablo_3_crack.pdfIn PDF document text
    • http://fimosabu.iblogger.org/browsec_vpn_premium_crack_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468534/normal_5fd083f899644.pdfIn PDF document text
    • https://cdn.sqhk.co/litawoxelida/jjjvYgg/business_accounting_salary_canada.pdfIn PDF document text
    • http://figupatofewox.iblogger.org/antigone_holt_mcdougal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410441/normal_6011a465887a1.pdfIn PDF document text
    • https://cdn.sqhk.co/nuditufu/bdljcMJ/msi_stacked_stone_colors.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383136/normal_60347034d1d0e.pdfIn PDF document text
    • http://sajutasure.22web.org/charkha_mera_rangla_sad_song_free.pdfIn PDF document text
    • http://gekujiga.iblogger.org/define_difference_between_elastic_and_plastic_deformation.pdfIn PDF document text
    • http://zurekeboxiba.22web.org/gofibititopodududuj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367297/normal_604d2c3e453e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465015/normal_5fd272cd4b712.pdfIn PDF document text
    • https://cdn.sqhk.co/jeporikate/fwjdhei/34787881685.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403130/normal_5fdbecc6210ca.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://naremijex.epizy.com/6489324006.pdfIn PDF document text
    • http://lunowakaneruf.rf.gd/8844618164.pdfIn PDF document text
    • http://memagom.epizy.com/jokixatodev.pdfIn PDF document text
    • http://timadulikojig.rf.gd/adobe_lightroom_android_4pda.pdfIn PDF document text
    • http://jojisoxig.epizy.com/excel_bedingte_formatierung_mehrere_bedingungen.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

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_off0000fdcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCC 5100 bytes
SHA-256: 0251a22fdfba367322ef7c6bd9f7ad587562abd25dff923f19a37f4eaba8bd8d
font_01_sfnt_off00010f2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F2E 10588 bytes
SHA-256: 8c0faa2795af720a62fc20dd8ef1944681351f38d2b5f6c7069c43177e2bca0e

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