Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1c5c5b6f8c53bf9…

MALICIOUS

PDF

159.0 KB Created: 2021-04-04 09:03:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 946f64c1a7c49d84a38468c94ab9f1ef SHA-1: b7e6d86cae3360437fa4ff30299cf7bc600be543 SHA-256: e1c5c5b6f8c53bf91777ea2c32062e5ab940cc5cdad45682283810d46a6ac9c9
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attack pattern involving redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://dafemum.ru/123?utm_term=philip+sidney+astrophil+and+stella+pdf PDF link annotation
    • https://ponefapu.weebly.com/uploads/1/3/1/6/131637257/bbf28b6a0a5.pdfIn PDF document text
    • https://wexewuvaxodewo.weebly.com/uploads/1/3/1/4/131407465/6277903.pdfIn PDF document text
    • https://nezikuwetop.weebly.com/uploads/1/3/5/3/135346993/cfc9736cbbda5.pdfIn PDF document text
    • https://zetizisoxaw.weebly.com/uploads/1/3/4/4/134498522/riwujuvego.pdfIn PDF document text
    • https://wabexerimib.weebly.com/uploads/1/3/0/7/130739061/f385b15bf0c09bf.pdfIn PDF document text
    • https://vamofelew.weebly.com/uploads/1/3/5/3/135398798/6555336.pdfIn PDF document text
    • https://fapudunaga.weebly.com/uploads/1/3/0/7/130776769/2001acd74.pdfIn PDF document text
    • https://sedivunoruset.weebly.com/uploads/1/3/4/8/134859312/89f741a74e8e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://79ab8074-8148-4faa-9219-f6cdfa35bc15.filesusr.com/ugd/99e004_c9049486d0604be4ae3e376a84f3342b.pdf?index=trueIn PDF document text
    • https://b0837e58-6fb0-4b2c-a83d-c451c4d85cc2.filesusr.com/ugd/1169b1_b2a85144883c4544bfb25035a859c1c1.pdf?index=trueIn PDF document text
    • https://9d1e48ad-bcd7-4831-9b7b-7108443a63b6.filesusr.com/ugd/136d07_ad5112c8baab4ce68f95a43a7761cd04.pdf?index=trueIn PDF document text
    • https://8d5bcf17-53f2-4f21-b585-7a27aef14131.filesusr.com/ugd/7baf93_b02dfcada02c4faea4bba1f156fa9ccb.pdf?index=trueIn PDF document text
    • https://d1e6aceb-f258-402f-b59e-92ecb386693c.filesusr.com/ugd/2cc58f_ff388044fac145b3b6ad0226c301962b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/daxemo/magistrates_court_sentencing_guidelines_ni.pdfIn PDF document text
    • https://9e269ae7-c3cf-4b9f-bde2-1d9be064b7bf.filesusr.com/ugd/139869_00873549b30741b7a409de1d0b91afd1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/basic_business_plan_template_australia.pdfIn PDF document text
    • https://f867c6cd-7aae-4938-a634-6821dcb48262.filesusr.com/ugd/eb45fa_1bcea3b0e7144007b04db47bc876c120.pdf?index=trueIn 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_off00023300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23300 5232 bytes
SHA-256: 90c1c5e0b2ba36e88d2cc20fd90e7499ea27869e34da770ec0e1291458d691ff
font_01_sfnt_off000244cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x244CF 11624 bytes
SHA-256: 524d09c655c3b3344fc50b3099b0d77eec4f398f0924adfceb22c2506f42851e

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