Malicious PDF — malware analysis report

Static analysis result for SHA-256 f22765ed7c39152f…

MALICIOUS

PDF

78.6 KB Created: 2021-03-07 03:58:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8665c63c58477448b386f9d99b9044ef SHA-1: 38abea1ca4777a843bb314c48faf3dd4efe90b67 SHA-256: f22765ed7c39152f1010064424b52dfd7798fb4c6a913ade7b230f52e0a124a6
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://midufefew.ru/wix?keyword=google+sheets+loop+formula PDF link annotation
    • http://ritixibetono.mygamesonline.org/85549838312.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464067/normal_5fd88fb99635e.pdfIn PDF document text
    • http://widokig.iblogger.org/19646239633.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503035/normal_601f1ba7e6889.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497688/normal_5ffbd83760258.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469365/normal_60386b61293a3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jirabasojexosud.atwebpages.com/equivalencias_fracciones_de_pulgadas_a_milimetros.pdfIn PDF document text
    • http://jeliponotetivek.epizy.com/7071579373.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/pexokanumujotasepaser.pdfIn PDF document text
    • http://zopefunexot.epizy.com/rojidoviz.pdfIn PDF document text
    • http://rojunemol.epizy.com/wonuwilirimotinuf.pdfIn PDF document text
    • http://pimobepetokonud.myartsonline.com/monat_rejuvenique_oil_intensive_uses.pdfIn PDF document text
    • http://napalujimawoz.rf.gd/facts_and_opinions_worksheet_doc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12a20548-47b4-4709-9739-281da5e03034/wonapu.pdfIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/financial_statement_analysis_report_format.pdfIn PDF document text
    • http://gajopule.myartsonline.com/mary_poppins_returns_cast_now.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dae87a4d-c886-4e33-a207-bec95513110e/up_the_organization_audiobook_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/concrete_strength_test_report.pdfIn PDF document text
    • https://s3.amazonaws.com/jokotaziweluge/lumigopudonot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc39aad2-d1c9-48ed-8f20-187771b3d524/xuramodimuvikoxetawovodo.pdfIn PDF document text
    • http://rijewetevoxo.rf.gd/ziroxudavetixaxikoj.pdfIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/font_barkentina_1.pdfIn PDF document text
    • http://xuvaduw.epizy.com/7615152975.pdfIn PDF document text
    • http://mujotipaxoxi.epizy.com/sample_accomplished_japan_visa_application_form.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_off0000ecee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECEE 5344 bytes
SHA-256: 224cf1a6bb2ab31983e422a67868a5e86e024156fdf490be0c5a8438947fff1a
font_01_sfnt_off0000fef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF6 14740 bytes
SHA-256: 25d40c3d0a8d08d3510c88e307a7137676b29c735d39c8e03109696296b0ee32

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