Malicious PDF — malware analysis report

Static analysis result for SHA-256 81dd069494af5099…

MALICIOUS

PDF

93.2 KB Created: 2021-03-17 11:23:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: d0176bc0c561307c6a420f8a33c62195 SHA-1: 9a5530fe66c0d4d2cf67b1d80b4766e9238127f5 SHA-256: 81dd069494af50993bceb5923bcd7757f6d8c629100b2322cef3edf64d78ba5a
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL identified as a potential phishing or scam lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links on disposable hosting, suggesting an attempt to distribute malicious content or redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/123?utm_term=new+blade+runner+parents+guide PDF link annotation
    • http://bcipreactivaperu.com/spectrum_reading_grade_6_answer_key_bonsaim14k7.pdfIn PDF document text
    • http://vabuzunaseridal.iblogger.org/google_safe_browsing_report_error.pdfIn PDF document text
    • http://sandiego-podcasts.com/13421805897vhxo7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/92404079364.pdfIn PDF document text
    • http://poborunedajemo.onlinewebshop.net/80731802542.pdfIn PDF document text
    • https://247e77cc-5367-4382-8586-7c5891409f42.filesusr.com/ugd/2dbf5a_d0724a183f1648059255497849bae468.pdf?index=trueIn PDF document text
    • http://wedopuketid.rf.gd/how_do_you_know_when_your_i12_tws_is_fully_charged.pdfIn PDF document text
    • http://kokibitumoxa.epizy.com/genazov.pdfIn PDF document text
    • http://raxajabidadida.onlinewebshop.net/4604395476.pdfIn PDF document text
    • https://65de77fc-0341-4fd2-89b2-cd6b005a91de.filesusr.com/ugd/cf79db_b96cd796d3bc428dbbe770027e461e54.pdf?index=trueIn PDF document text
    • https://b7e73dfe-ad35-4791-b4f7-7500f5b7882c.filesusr.com/ugd/bc79a4_b9e6a4d4d8304832ad722b7603a636c7.pdf?index=trueIn PDF document text
    • http://wixukitasezi.epizy.com/parajipepomuwupasixakini.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/16455360950.pdfIn PDF document text
    • https://6a24fdd2-d4a5-4c4b-882b-0f3115751bcf.filesusr.com/ugd/04e6f9_dd5f97ae2b5f4b5d975e3503900e9aa9.pdf?index=trueIn PDF document text
    • http://fanuxifesuz.rf.gd/26924343662.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_off00012e10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E10 5328 bytes
SHA-256: aebf2a6ce1244156158969dddbe6b13b96f97505c7cdba154bf4deb765fe196b
font_01_sfnt_off0001404e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1404E 11920 bytes
SHA-256: 0e09c7b4027add8c23e1d8ca76dead2ce558f2e2155f7866ef37c3fa792c0146

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