Malicious PDF — malware analysis report

Static analysis result for SHA-256 07f0fcd044b9a30a…

MALICIOUS

PDF

73.6 KB Created: 2021-05-10 07:47:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: e4c88532f4b3f87baad7ff99087192e1 SHA-1: dffb804c28e0dc17f8368833bd1f44a66cb46876 SHA-256: 07f0fcd044b9a30a0e1154ca888f8501f4c9efb316e4ff000fe5ec6eaee0df0e
186 Risk Score

Malware Insights

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

The PDF contains numerous 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. The embedded URLs and the heuristic findings of PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://xezojetit.ru/strik?utm_term=selected+solutions+manual+for+chemistry+structure+and+properties+pdf PDF link annotation
    • https://sodipojemip.weebly.com/uploads/1/3/5/3/135325099/fowokixaz_lizajakoxa_putitekim_jefipegivixaxox.pdfIn PDF document text
    • https://sakuvajavabese.weebly.com/uploads/1/3/1/3/131383602/5172747.pdfIn PDF document text
    • http://sopisafexuj.sportsontheweb.net/30167488799.pdfIn PDF document text
    • http://suberubepuparo.getenjoyment.net/xoxapupoxito.pdfIn PDF document text
    • https://pubedazemel.weebly.com/uploads/1/3/4/8/134870130/murebowixoleweb.pdfIn PDF document text
    • http://xuxikurov.mygamesonline.org/arthritis_back_exercises.pdfIn PDF document text
    • https://mirodogewe.weebly.com/uploads/1/3/4/8/134861862/911689e81b5e.pdfIn PDF document text
    • http://wapadax.scienceontheweb.net/what_is_the_best_waterpik_for_implants.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366665/normal_5ffda5a801415.pdfIn PDF document text
    • http://wewogokuwidu.mywebcommunity.org/illustrator_save_smaller_file_size.pdfIn PDF document text
    • https://wefizaxire.weebly.com/uploads/1/3/0/9/130969527/nilolapatarati_kunesiluze_xugivu_jufila.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448720/normal_6062049cdf618.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479439/normal_5fe9aeed15e20.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://duxepivol.myartsonline.com/ruwakiwuruboresenitoj.pdfIn PDF document text
    • https://0f424234-9c27-4462-a606-4b2ccecf17d8.filesusr.com/ugd/b42a09_91194bf84dd449af9a59f81551652768.pdf?index=trueIn PDF document text
    • https://8994dc82-3839-475c-8de5-8afaa5c13229.filesusr.com/ugd/798b5e_6dc0bacd789542288250a2ddc6ed79ed.pdf?index=trueIn PDF document text
    • https://6b9ff03a-ef48-417a-a14c-919df0f903d0.filesusr.com/ugd/f459ea_865e3778767b40c0b58cf96eea07c1b9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/waduzirader/35308118069.pdfIn PDF document text
    • https://s3.amazonaws.com/vebisop/pedazomozu.pdfIn PDF document text
    • http://zexaxekiki.atwebpages.com/19876406451.pdfIn PDF document text
    • https://4eb3a9b5-ca6a-4b2a-896e-878abc754f3b.filesusr.com/ugd/f1ab86_78f8f1e035e94d93996a6e81297c8645.pdf?index=trueIn PDF document text
    • http://vulopekusape.atwebpages.com/fofarakogorufuzurolaw.pdfIn PDF document text
    • https://99516632-72ce-40f3-a9a1-a01c91361c65.filesusr.com/ugd/e42c35_3f61b5a3a1114e769434d1c36077b9f2.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d36f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD36F 5484 bytes
SHA-256: e09d33cc7ab90b6f813e2c383552ca4156e8f38da6ffc7a5b8a2e2a0fd3fc353
font_01_sfnt_off0000e5df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DF 9900 bytes
SHA-256: 73e7f68a7a105eafe39fa59b012665ceef89dff169bb98ac757c0c0dcde12250
font_02_sfnt_off000107ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107CE 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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