Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce68e2d8b6d6059f…

MALICIOUS

PDF

78.3 KB Created: 2021-03-30 18:31:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: cb7f79f3f91bbdb38e72eb61274dc51c SHA-1: aa824764042541b6648d029b6df98f8a01791b7e SHA-256: ce68e2d8b6d6059ff5d2b738b5140e25a2d684dfa4118f26c871d5d6a294da1d
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 part of a link farm, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to external malicious content, likely for phishing or further payload delivery.

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://jumiwimov.ru/wix?keyword=tipos+de+teatro PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4496146/normal_6002d2851428b.pdfIn PDF document text
    • http://zuwujamoruwipam.22web.org/28311510.pdfIn PDF document text
    • http://vekowen.getenjoyment.net/pre_algebra_review_worksheets.pdfIn PDF document text
    • http://gazinukonap.iblogger.org/28115257438.pdfIn PDF document text
    • http://wimudevereru.sportsontheweb.net/54185995970.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471474/normal_60480b43b5d74.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405925/normal_5fed1b49588a6.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/pibajuwi/bcbs_of_texas_coverage_exception_form.pdfIn PDF document text
    • http://sigogijukajuli.rf.gd/19601727693.pdfIn PDF document text
    • https://47c0d0ed-94e3-447f-940a-e265262d053f.filesusr.com/ugd/a43ec6_dc15ee3cdb7648e280d206bf2b153741.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/metakibeme/248018823.pdfIn PDF document text
    • http://seroritubofa.atwebpages.com/en6501_municipal_solid_waste_management_book.pdfIn PDF document text
    • http://nojisibi.rf.gd/jabovopumejo.pdfIn PDF document text
    • https://b03e51a8-7171-48c0-94d6-e4c032e6f37f.filesusr.com/ugd/9421c8_14b7d46991944daab79a8766273475ed.pdf?index=trueIn PDF document text
    • https://47a25507-5c4f-4e73-9b7c-0c49514c8174.filesusr.com/ugd/e00bd3_d6e0939da9c849c2ae7b74feab058801.pdf?index=trueIn PDF document text
    • https://ec5c17a1-061e-4a2c-a9e6-b3561ba71229.filesusr.com/ugd/299074_d88a897a620b4919b8d796936262b00e.pdf?index=trueIn PDF document text
    • https://6cbe2f5c-748b-4bc6-b691-25a968a47885.filesusr.com/ugd/d6b5da_9b1ace12aa0f41e4be844c41ac66caca.pdf?index=trueIn PDF document text
    • https://569961a5-e6b5-462d-8b38-7193d5e7b20b.filesusr.com/ugd/a37a2e_1452af9f235a49128dd2dfd50cbcd4a7.pdf?index=trueIn PDF document text
    • http://wevisoxa.epizy.com/buninudosivivo.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_off0000f588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF588 4868 bytes
SHA-256: 67dadbefeb5db9d74ad1e80ae108fea3798875d1ed173da11cd20f978c2296aa
font_01_sfnt_off00010620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10620 11376 bytes
SHA-256: 8d313199d8ce0382be63c04123d7985afbf7e597fe31b533200b762078fccabc

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