Malicious PDF — malware analysis report

Static analysis result for SHA-256 4061c89d3000c6f5…

MALICIOUS

PDF

81.2 KB Created: 2021-03-09 08:17:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 1747ef4fc57ff8aa4f5e3f7990607650 SHA-1: b5706a6be3f13e3bcebc880275d4f71accf979cc SHA-256: 4061c89d3000c6f5ad658c556fef70d629a5d154b5927b97f12f5e370595d796
126 Risk Score

Malware Insights

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

The PDF document contains embedded URLs that redirect to a link farm, indicating a phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though truncated, suggests a lure related to 'How to setup my roomba' to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=how+to+setup+my+roomba PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4444869/normal_60145834d051b.pdfIn PDF document text
    • http://meziradidanaru.iblogger.org/descargar_musica_gratis_para_android_mviles.pdfIn PDF document text
    • https://wokusozevopiwaj.weebly.com/uploads/1/3/4/3/134381386/37a0514d105a.pdfIn PDF document text
    • http://varuzajuv.22web.org/renal_artery_aneurysm_guidelines.pdfIn PDF document text
    • https://vepemetamat.weebly.com/uploads/1/3/4/3/134354227/nopemitajari.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366639/normal_5fd655b70d58b.pdfIn PDF document text
    • https://jonewaxuge.weebly.com/uploads/1/3/5/3/135319919/nazedegamul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483338/normal_60407eed46d20.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xaramoturowuf.rf.gd/jixafopiwaxemojipetevobag.pdfIn PDF document text
    • http://zalezir.epizy.com/is_cloud_atlas_2012_worth_watching.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f80afe52-39c3-4b72-99dd-4a27edcc6d5a/69498185865.pdfIn PDF document text
    • http://refaruzevogot.epizy.com/rovagiwizaxaz.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/zovoruxojanejegefab.pdfIn PDF document text
    • http://nezuwuxupewe.rf.gd/gekisijefopipipifatot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac4256ff-cd9e-496d-b629-129011fcfe40/mozukular.pdfIn PDF document text
    • http://rinexijirava.rf.gd/proper_bench_press_form_for_chest.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/mirumojegave.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc98f6b3-f2ce-43fc-85a5-6de84f51c57a/ups_aircraft_maintenance_manager_salary.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/wilsonart_laminate_sheet_sizes.pdfIn PDF document text
    • http://kodugexibitomo.rf.gd/pidotejovije.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/083e5322-3684-4296-8eed-c54be2140af7/drz400_engine_rebuild_kit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acc5ad90-7f31-412a-bb03-b1eebb8a4533/how_to_make_your_script_better.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_off0001001d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1001D 5228 bytes
SHA-256: a013d92d1bce9421557ac5425b35d8e9ad6a0782c6badcc1d2a23ec4d57a42c8
font_01_sfnt_off000111da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111DA 11008 bytes
SHA-256: c08f82738442fc80b9fdcc2189de1471ff638c9df5c454e8f8227dfe85057b0a

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