Malicious PDF — malware analysis report

Static analysis result for SHA-256 93877c02e5f3151f…

MALICIOUS

PDF

72.2 KB Created: 2021-06-08 18:13:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 05237aa945a980c34acb33e0b58d2544 SHA-1: 5124b7ca90c5206dce194f0078aba250b0687a54 SHA-256: 93877c02e5f3151fd8800d6cf6d7b053475517505cd9a4d160c3c28dfc59d02c
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards the exploitation of PDF vulnerabilities or social engineering to drive traffic to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://smidgel.ru/pbw?utm_term=sample+book+review+examples+pdf PDF link annotation
    • https://bomaripuxizidul.weebly.com/uploads/1/3/4/9/134901287/4815108.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463286/normal_604683ac3b6b6.pdfIn PDF document text
    • https://fewegako.weebly.com/uploads/1/3/1/4/131453302/5196536.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370263/normal_6035dcbceeeaf.pdfIn PDF document text
    • https://satalediveli.weebly.com/uploads/1/3/4/0/134018026/4190853.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459470/normal_60239daf26a1f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420030/normal_6000e5742f45d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418558/normal_601dfc175c05d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dbb084f-e111-46dc-b0dd-860937a34463/kumojovuvobiwakivemet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9749bdda-24bd-43e3-9e75-9883cef81aae/79123235297.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97db244f-1332-4282-ba88-bfefb0ba4d97/somozesekuneloka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2391058d-3bbc-4e2e-96d0-15d408da851a/79948796943.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ad662b0-5092-4bd6-afa1-e23cb8658636/21800228280.pdfIn PDF document text
    • http://lokuwulixit.pbworks.com/w/file/fetch/144718689/how_to_service_a_navien_combi_boiler.pdfIn PDF document text
    • http://sozakuvepar.pbworks.com/w/file/fetch/144518163/how_to_get_a_bank_statement_from_netspend.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e009821f-698d-49ca-acaf-37a3fc24358c/sony_wega_tv_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/370a2ce3-b451-43c3-9308-d07a13d1dd94/getting_started_with_spring_framework_github.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43cb0e69-e493-4e0f-b0fb-27bb73d23f30/how_long_does_it_take_to_make_beef_jerky_in_a_food_dehydrator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/caab7cdc-2608-4617-92fa-dd7f586b85fd/19724437606.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef43e3a9-b0a6-4e9b-98f7-acf045facb08/how_do_you_introduce_seasons_to_preschoolers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f990d840-1f30-4a43-99a5-0b49aa7a5470/rokosaxufazinikizuxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab910588-e054-4a9c-9f3d-4ea10185d776/8185574746.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a45affd-d374-46ad-add1-8c36a5d683ef/logic_pro_x_download_windows_crack.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_off0000dc93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC93 5712 bytes
SHA-256: 363cb28edf4e03be3d34c11227fe64283d42bd3777b8163f83fcbc7d134982ed
font_01_sfnt_off0000effc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFC 10604 bytes
SHA-256: d64d42ce75d22684b7b38c2be2fbe0404828ddbfa8f15ede4c28c67eb218f739

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