Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdd41634e24f9ffe…

MALICIOUS

PDF

74.5 KB Created: 2021-03-17 22:53:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 25a20d32dbaa6c191bc5b78a05da71b6 SHA-1: 9e4658922ad37b22e4819bdd07610e01e5f84ae5 SHA-256: fdd41634e24f9ffea15f26a7c1a7f7629fbcdfa91720cafce2498b5c31571816
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable domains and are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to search results for sheet music, which is used to disguise the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://golowaki.ru/123?utm_term=cancion+del+mariachi+sheet+music+guitar PDF link annotation
    • http://bilkaita.space/279137759049zo5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476924/normal_604a9debdb60f.pdfIn PDF document text
    • http://dudodew.iblogger.org/catullus_carmina.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390641/normal_5fd9e4c092b06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483624/normal_602dfa7047948.pdfIn PDF document text
    • http://forajadafogaxuv.medianewsonline.com/decision_support_and_business_intelligence_system.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448727/normal_5fec99b8ba89b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476756/normal_5fd9579e7a789.pdfIn PDF document text
    • http://tipofeliluget.medianewsonline.com/what_n-type_semiconductor.pdfIn PDF document text
    • http://warowusavi.mywebcommunity.org/joxikamiparixibodoxewa.pdfIn PDF document text
    • http://bixekakazozerol.mywebcommunity.org/adobe_reader_for_windows_10_download_free.pdfIn PDF document text
    • http://lnstagram-badge-verification.com/ark_spoil_timewaj4d.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/fobupojowojon/368466370.pdfIn PDF document text
    • http://juletonos.epizy.com/vijoxofugasezowutezalerof.pdfIn PDF document text
    • http://numubujekan.rf.gd/what_does_it_mean_to_have_scheduled_maintenance_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/88052957763.pdfIn PDF document text
    • http://xixakoju.rf.gd/darusul.pdfIn PDF document text
    • http://famomijis.onlinewebshop.net/standar_akuntansi_keuangan_iai.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/eureka_math_grade_8_module_3_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/natewared/international_guidelines_for_asthma_management.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_off0000e49f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE49F 5260 bytes
SHA-256: 9fb3f76d110b5439aa763803612723dfbcd3f5d6b78b537055e96ae65d099374
font_01_sfnt_off0000f649.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF649 11300 bytes
SHA-256: 123afecde8936b53a11369c1f09b10f28b0176ac56fdefa640ebb7324c1f0dfc

Open this report in the interactive analyzer, or submit your own file for analysis.