Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb4850c28f4525a3…

MALICIOUS

PDF

94.7 KB Created: 2021-04-16 21:03:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: ab0e84deeaa0bfa5d45b1529092ba28f SHA-1: b140fe15cfefb229a4e72b64f9f096a1ce418978 SHA-256: bb4850c28f4525a3c124630bccbd5681fe7eda9f6440919c8a5bbc9960232f7c
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are flagged as link farms, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://lozipotod.ru/strik?utm_term=bedford+book+of+genres+chapter+2 PDF link annotation
    • http://idealica-uficiale.website/74279278581lnc1k.pdfIn PDF document text
    • http://petrol-v-pol-price.site/javazuwulodumotuvau9c4a.pdfIn PDF document text
    • http://kuvezowepo.scienceontheweb.net/72265311683.pdfIn PDF document text
    • http://fujudigisegejeb.iblogger.org/jurnal_internasional_akuntansi_sektor_publik_2020.pdfIn PDF document text
    • http://ralugugifoxatir.scienceontheweb.net/appleton_electric_catalog.pdfIn PDF document text
    • http://1-bog.ru/it_stephen_king_book_pagesg06of.pdfIn PDF document text
    • http://euromarket.pro/85735763758wu91g.pdfIn PDF document text
    • http://vijufik.iblogger.org/20411258695.pdfIn PDF document text
    • http://jaxopofo.22web.org/articles_contracts_exercices.pdfIn PDF document text
    • http://xebubux.sportsontheweb.net/24299431559.pdfIn PDF document text
    • http://bibujajed.22web.org/basics_of_excel_sheet.pdfIn PDF document text
    • http://003-center.ru/42932425200v1245.pdfIn PDF document text
    • http://zajiledafalam.getenjoyment.net/99916225199.pdfIn PDF document text
    • http://gipeturira.22web.org/16584159001.pdfIn PDF document text
    • http://erkutungotu.com/kujusiwoxawixukotonopoe3maf.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/84719b21-2f4f-460b-b7e7-ad16f823ec00/how_to_factory_reset_kidibuzz_g2.pdfIn PDF document text
    • http://sezajuvijib.rf.gd/pneumatic_system_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0586e810-b286-4e7a-a9fa-4805f7326ed6/how_do_i_calculate_my_weight_watchers_smart_points_allowance.pdfIn PDF document text
    • http://wafogaz.rf.gd/87262987967.pdfIn PDF document text
    • http://xubomegixabax.epizy.com/45120461133.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ed9fd15-46a3-4fda-af2e-d01c18583eb7/wogureluzekuxokusonimo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f79054c0-2aec-43e5-a6f0-f37828a16c76/nenufowanizoxadumureben.pdfIn PDF document text
    • http://tokewaperomuveb.epizy.com/85858478179.pdfIn PDF document text
    • http://nopowilaleso.rf.gd/20946301996.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4174da2-37d1-44d6-8c0f-61b2f89051ae/jazagul.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_off00013441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13441 5772 bytes
SHA-256: 8ebd1d2bac4d7bc7aef064b4ae1d71a28b46685d982ba3bb2e1bffa15e1e9305
font_01_sfnt_off000147ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147EE 11164 bytes
SHA-256: c9c8d87bf50f7e339d0340ef561a9bdc1dbf0f63a63efb92cb3a35acd8af77ec

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