Malicious PDF — malware analysis report

Static analysis result for SHA-256 d06ee08e68c21af8…

MALICIOUS

PDF

79.2 KB Created: 2021-05-03 16:55:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: c586f27c58100051902799bafb54bd62 SHA-1: d8177c5bec705459a3fae6b3877a656191f424d7 SHA-256: d06ee08e68c21af8bf415d75751eb03ee660e816ed27d99c0d9197d374f8a859
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 ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, with a primary suspicious URL pointing to `resalured.ru`. The PDF structure and embedded links suggest a phishing or malware distribution attempt, likely using a lure document to entice users to click on the malicious link. No scripts were extracted, but the PDF's nature and the presence of external links strongly indicate a malicious intent.

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://resalured.ru/strik?utm_term=powerstation+psx+1004 PDF link annotation
    • http://pedaxofanor.mywebcommunity.org/office_manager_job_description.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501962/normal_5fcabb7336d4a.pdfIn PDF document text
    • http://xafomona.mypressonline.com/barnardos_ireland_risk.pdfIn PDF document text
    • http://apple-fruit.space/lloyds_lc-1158_manual3nc81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382639/normal_605b982ed5bdc.pdfIn PDF document text
    • http://afracheat5.xyz/vukefasimanebezpnhd.pdfIn PDF document text
    • http://doucheop.xyz/what_is_carbon-14_dating_technologyg4qg8.pdfIn PDF document text
    • http://byt-upak.ru/mack_truck_manuals0xjsd.pdfIn PDF document text
    • http://waranijovuv.sportsontheweb.net/search_for_files_using_google.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487206/normal_5fdda61d3f9ac.pdfIn PDF document text
    • http://moreprodukti.com/xedifivenipezafxcyv.pdfIn PDF document text
    • http://biolinkus.me/jotoreti0oksv.pdfIn PDF document text
    • http://rezolawanelu.sportsontheweb.net/activity_diagram_definition.pdfIn PDF document text
    • http://prodson.space/ccir_b_full_formr54is.pdfIn PDF document text
    • http://zabavnyi-slon.ru/18247005184rme45.pdfIn PDF document text
    • http://tixshopclub.fun/vox_tonelab_le_tube_changeciqci.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/sebunuzu/10579000063.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d74a4181-ba07-4d1e-842e-cb321052385c/5542780251.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e17e3b2-215a-4200-a45f-f55e8a582c0d/davaka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51c7a4a6-f481-445a-a78b-2aa9790d4492/how_to_clean_a_honda_mower_carburetor.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/58470150356.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62c4951e-8c83-4ad4-a51d-51ede786a961/health_economics_and_outcomes_research_salary_in_india.pdfIn PDF document text
    • http://gujimosodaza.myartsonline.com/73839104178.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/73458010219.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/65367892724.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_off0000f4d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D3 5224 bytes
SHA-256: 4c34f05049181261a861d19ea4207294387ab9985e28bdc08cc4b2a956d3e689
font_01_sfnt_off000106c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106C5 11824 bytes
SHA-256: 72022d7d7c3617ae38f5ef2feac7d787a89be5f00b161e8883c1394fc23bd4a0

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