Malicious PDF — malware analysis report

Static analysis result for SHA-256 a261bfeafa9c34b2…

MALICIOUS

PDF

120.1 KB Created: 2021-05-14 02:27:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 4e045eb9ba17dfe9739306c1906a1488 SHA-1: 0a697d8925e85fcb4de34e5bc9e1c234675b1b81 SHA-256: a261bfeafa9c34b2c3cba1f8dbae38dc1b61c188ef7c97f2b84b5af77ca46ae8
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious phishing content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a large number of links on potentially malicious or spam-related hosting. The presence of embedded URLs suggests an attempt to redirect the user to external, potentially malicious, sites.

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://mezovuduw.ru/strik?utm_term=what+are+the+main+elements+of+world+systems+theory PDF link annotation
    • http://store50off.info/64686586894ds1m4.pdfIn PDF document text
    • https://cdn.sqhk.co/tamupoto/jvoA0yl/kikumupem.pdfIn PDF document text
    • http://form-copyrightservices.com/pizemogafizujudumalofaxox5pkg.pdfIn PDF document text
    • http://moscowflowers.shop/contax_t2_for_sale_australia1w2n0.pdfIn PDF document text
    • http://glawerry.online/python_cheat_sheet_2021kzk6z.pdfIn PDF document text
    • http://sanatoriy-izumrudny.ru/excel_vba_range_object_requiredjwfc6.pdfIn PDF document text
    • http://smartradiobf.ru/bleach_capitulo_199_audio_espaol_latino_facebookgkvzo.pdfIn PDF document text
    • https://cdn.sqhk.co/sururezog/bgeihex/cheesy_monkey_bread_pioneer_woman.pdfIn PDF document text
    • https://cdn.sqhk.co/gulaxemetila/a9hhCzk/canadian_hockey_players_on_dallas_stars.pdfIn PDF document text
    • http://haustova.com/854964093259mr4f.pdfIn PDF document text
    • http://opensalle.xyz/71415080300xffkx.pdfIn PDF document text
    • http://smartcoin.design/danunepafemipokoratolulaogru9.pdfIn PDF document text
    • https://cdn.sqhk.co/mezutowede/idohekt/kogonagimanezonavibapipis.pdfIn PDF document text
    • http://rixorevu.getenjoyment.net/acute_coronary_syndrome.pdfIn PDF document text
    • http://olipaka.xyz/what_is_the_key_distinction_between_classical_conditioning_and_operant_conditioningxdj98.pdfIn PDF document text
    • http://suzamajotibe.mywebcommunity.org/kanesudusiwarejimefe.pdfIn PDF document text
    • http://rivafigikiwax.medianewsonline.com/definition_of_democracy_by_scholars.pdfIn PDF document text
    • https://cdn.sqhk.co/ruvonusebex/ym5qhje/duzoxigirupe.pdfIn PDF document text
    • http://getfreecreditreport.info/99348455403kp3xh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://livirava.atwebpages.com/the_human_adventure_breasted_and_robinson.pdfIn PDF document text
    • http://lewinozed.atwebpages.com/trig_equations_for_non_right_triangles.pdfIn PDF document text
    • http://nibemodida.myartsonline.com/lojixixelaluloxavoj.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_off00019828.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19828 5356 bytes
SHA-256: 34e4ea2acb158bfc8a376df37fe17fc3fb6cf9584bc2e905cae9d07cde3798af
font_01_sfnt_off0001aa4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AA4C 12484 bytes
SHA-256: 6141e67b6291f09858c43efc2e3ecf0432d2ad78658dc813da5c33053b339194

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