Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe2494129a3911a1…

MALICIOUS

PDF

125.4 KB Created: 2021-03-20 13:04:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 72fb2f4d3afb0a9428de518c267fd56e SHA-1: 6e92080445147034243839a1ba65f2c54c9d37aa SHA-256: fe2494129a3911a1697e7650397dc2e3d38ce5ae9276976c201b05f35fa4e3ba
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF containing numerous embedded URLs, many pointing to disposable domains, and is flagged by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly indicates maliciousness. The presence of embedded URLs suggests an attempt to redirect the user to malicious sites, likely for phishing or to download further payloads.

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://vilenefex.ru/strik?utm_term=how+big+was+israel+in+biblical+times PDF link annotation
    • http://tulomodev.getenjoyment.net/dungeons_and_dragons_cartoon_voice_actors.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493867/normal_601d79828e316.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480170/normal_601ce8d6c308f.pdfIn PDF document text
    • http://menformula.xyz/sekoserenawanijo0ht.pdfIn PDF document text
    • http://lugodapamaj.mygamesonline.org/96088485262.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424330/normal_6044f4ab15710.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421365/normal_601b00ab8bc61.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377113/normal_5fcbde0661b6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474722/normal_6014c0c18519f.pdfIn PDF document text
    • http://mexicotop3.xyz/wilimuginazoluworavp0zgh.pdfIn PDF document text
    • http://clubstore.pro/920294149208cesv.pdfIn PDF document text
    • http://spainsale.pro/avoir_et_tre_indicatif_prsent_exercices5u4p3.pdfIn PDF document text
    • http://labiosdewonda.com/data_structures_and_algorithm_analysis_in_java_solutionupswp.pdfIn PDF document text
    • http://eroganoficial.site/administracion_de_recursos_humanos_wayne_mondy6z0n9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412170/normal_600009465a4f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467318/normal_6051f2e310a63.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kenizuz.epizy.com/active_and_passive_voice_worksheet_class_6.pdfIn PDF document text
    • http://gogewarixisude.epizy.com/afterburner_pc_game_free.pdfIn PDF document text
    • http://tiluxusimutine.atwebpages.com/83238375998.pdfIn PDF document text
    • http://mededulafika.epizy.com/aurora_4x_mac.pdfIn PDF document text
    • http://jumepenitujox.atwebpages.com/nexapamukazidiki.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001ae5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AE5B 5312 bytes
SHA-256: 9d76cf397828b9d90c1be046656778259789d78250afe71935cef1d9376859df
font_01_sfnt_off0001c06b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C06B 11860 bytes
SHA-256: 4676dd4e72496a465669284caf8accc5e158a6990e45ca27d09bd81d0bb80ad8

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