Malicious PDF — malware analysis report

Static analysis result for SHA-256 95efadb46fe4f19d…

MALICIOUS

PDF

76.7 KB Created: 2021-03-03 06:54:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 03525fe0637e45650926cea54590db7c SHA-1: 1e06f41a5aaf86a98fe0e4b3b491ffdc9cdb60a6 SHA-256: 95efadb46fe4f19dd312d99f2c4583dec8f13fc8afabb89f30d7c11ffacf7134
126 Risk Score

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 0.9998

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://xezojetit.ru/123?utm_term=flowers+in+the+attic+reading+level PDF link annotation
    • http://sitebomobegux.sportsontheweb.net/nelozi.pdfIn PDF document text
    • https://kenemujawov.weebly.com/uploads/1/3/4/6/134645985/muwapoxowudof.pdfIn PDF document text
    • http://edayafar.xyz/nurufawisopnujw.pdfIn PDF document text
    • http://dihtyar.online/forubugumet6d9.pdfIn PDF document text
    • http://summ-green.fun/performance_appraisal_template_south_africanzhiq.pdfIn PDF document text
    • http://lemixebu.22web.org/dunarozizimujijawuwezam.pdfIn PDF document text
    • http://nat-fru.space/sevirabwvcy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447263/normal_5fdd979177c7a.pdfIn PDF document text
    • http://faripofijukevom.mywebcommunity.org/17344865117.pdfIn PDF document text
    • https://koxoganonigowup.weebly.com/uploads/1/3/1/4/131408343/5ebf84084.pdfIn PDF document text
    • http://italdom.fun/vemepikesoluvumeb7660.pdfIn PDF document text
    • http://vubitim.sportsontheweb.net/escuelas_sistemas_y_corrientes_de_la_psicologa_contempornea.pdfIn PDF document text
    • https://domisupufiz.weebly.com/uploads/1/3/5/3/135316273/4f13135d6eb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zilowovuv.atwebpages.com/perisu.pdfIn PDF document text
    • http://ribaxekag.epizy.com/dependent_and_independent_clause_quiz_with_answers.pdfIn PDF document text
    • http://rogofideb.onlinewebshop.net/37119990908.pdfIn PDF document text
    • http://pizitibasowu.atwebpages.com/how_to_solve_a_rubiks_cube_2_step.pdfIn PDF document text
    • http://nixomirorubu.myartsonline.com/life_history_of_david_maraga.pdfIn PDF document text
    • http://nibopinalilabaj.onlinewebshop.net/nirewukilutenafegubejafad.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_off0000edfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFC 5308 bytes
SHA-256: 2da79589c2b80d2988c843999bb8f4db4ac9636ec5fb52c010b32179441e59e3
font_01_sfnt_off0001001c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1001C 11132 bytes
SHA-256: 2aef8dae653b4bb4e27b60f674313aeae0a9a29ea1c4fe876b1e3e3afbb2ed57