Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6117c1751c23c8f…

MALICIOUS

PDF

91.8 KB Created: 2021-04-09 04:08:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 4d675cc9d493b627930df03949fe2413 SHA-1: 01b448429e3c047af17b17a1870748dc30e32055 SHA-256: b6117c1751c23c8f46f9270977d8e7999ca38d41b09e1419b91516db6a88e6f5
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links point towards an attempt to redirect users to malicious content, potentially leveraging embedded JavaScript.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://zajinet.ru/strik?utm_term=how+to+become+a+part+time+real+estate+agent+in+malaysia PDF link annotation
    • https://duvirimak.weebly.com/uploads/1/3/4/6/134603536/5149420.pdfIn PDF document text
    • https://xumipapabof.weebly.com/uploads/1/3/4/6/134609146/7a159e2af26.pdfIn PDF document text
    • https://fitisasituwag.weebly.com/uploads/1/3/4/8/134846324/9075960.pdfIn PDF document text
    • https://nubeboganiroj.weebly.com/uploads/1/3/1/3/131384383/nudesaxuli-besogi-renunezinu.pdfIn PDF document text
    • https://roxilegetewus.weebly.com/uploads/1/3/4/7/134721251/dulesar_mevijukurif_pikifesi_geraxijojumis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412183/normal_5fe1149e4c825.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390081/normal_600517d0c249a.pdfIn PDF document text
    • https://movediwifed.weebly.com/uploads/1/3/2/6/132695881/zurakosutuvixel.pdfIn PDF document text
    • https://zolefixu.weebly.com/uploads/1/3/4/4/134432518/c703ce497.pdfIn PDF document text
    • https://zitejapaj.weebly.com/uploads/1/3/1/8/131872087/6315883.pdfIn PDF document text
    • https://doleroxewaforud.weebly.com/uploads/1/3/4/3/134322791/ac7c29e1210.pdfIn PDF document text
    • http://moresukko.ru/56087576119n2u7o.pdfIn PDF document text
    • http://cashbackk.site/crossfit_workouts_for_femalex6df5.pdfIn PDF document text
    • http://livecopyrightverification.com/mastermind_1_students_bookobnty.pdfIn PDF document text
    • https://mokonalu.weebly.com/uploads/1/3/0/7/130739423/7874122.pdfIn PDF document text
    • http://sberpodarok2020.online/43865513694pwrud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416305/normal_6041746acf5be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412181/normal_606295c1ec0d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457296/normal_602ce18322cef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0d555108-1732-4721-8d72-76d747b2053a.filesusr.com/ugd/1b0481_1ec851611eb64a39aebfb33d0315c352.pdf?index=trueIn PDF document text
    • https://19004eff-8f5e-45b0-b15a-9fbdbd99e39d.filesusr.com/ugd/578ea4_f7cbe4d70e074fe0ad4f306d560300ad.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0445c5d-ed9f-47b0-8d04-d0d110344be6/family_tree_chart_template_google_docs.pdfIn PDF document text
    • https://550dfcec-0280-4316-a0d5-68b74a7a20b9.filesusr.com/ugd/f59309_c55b83e7a0644ec38c87063f64fffa2d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccde6117-7f71-418f-872e-0eeafef8b970/kujolirexitaba.pdfIn PDF document text
    • https://645c32c3-7e99-4959-b93b-7980205539d7.filesusr.com/ugd/30a31c_96e1c90fb1174ab890ebbb349695a199.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/86ef15f5-0c8c-40ba-9ce2-ab0d1085b107/61234503439.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11125 5548 bytes
SHA-256: d66adf92fc6da89cd26fd50931a383aecd2614e25cd2bbecfa80ad954fa87a6f
font_01_sfnt_off000123fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123FE 11616 bytes
SHA-256: 40cd16a86c1fde3e638868dcc61d12023ede8fbfcfcaf9bc6a4535fd76e8a157
font_02_sfnt_off00014bb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BB3 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd

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