Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ba5ec9f3f68f644…

MALICIOUS

PDF

75.9 KB Created: 2021-03-06 05:16:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 6284bfcfc3d0bcf921496a142b1b2a09 SHA-1: c2eba6add2b10f4b0c17862c45eee13fbb822128 SHA-256: 5ba5ec9f3f68f6446c2410a464eb66449fce380de43b98df6608a9cf0cfc9b1d
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a phishing site, disguised as a carpet cleaner manual. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing and trojan activity. No scripts were extracted, but the presence of an external URI and the document's deceptive content point towards a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://botokaw.ru/123?utm_term=hoover+spinscrub+carpet+cleaner+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4483833/normal_603f21b63060b.pdfIn PDF document text
    • http://simkosa.website/how_to_enable_4k_on_element_tv90shg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376858/normal_6042d1a2a07d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470692/normal_602521b7e0785.pdfIn PDF document text
    • http://vamoktin.ru/306540157518z1j9.pdfIn PDF document text
    • http://generatorsale.ru/area_formula_for_triangular_prismq8ouq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501212/normal_600b3ce22710a.pdfIn PDF document text
    • http://detonic-de.website/vivofit_jr_2_bands_disney6v6br.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418991/normal_6010a8753835c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393521/normal_600f460452b9d.pdfIn PDF document text
    • http://lifeeuro.info/makabavinozojuzupeso5ay8l.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/ac5bccf8-148c-40da-abfe-f0619b2517bd/6816355149.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8925c3d-3207-447a-a5ae-ade832dfcbbe/craftsman_chainsaw_16_36cc_fuel_line_replacement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f396ef3b-1ecc-4de2-a8bc-b0b803622f8b/47862797203.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5de171f1-b83d-4592-b74a-5a3d4f5e8600/55069657828.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ea32e70-3214-42fb-8b11-db3372b749d9/jixuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74b7077c-b5d0-47e9-8d56-ef5c106b3ed7/viewtv_at-163_troubleshooting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05a90de0-55c5-48ca-84e5-ffcdae724ff5/lean_management_training_melbourne.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ee59e66-925b-4994-a94e-9c3f916f8652/words_their_way_spelling_inventory_primary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e3028aa-00ee-4045-9c51-fdae5bf8792d/28910808760.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_off0000ed3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED3A 5240 bytes
SHA-256: 9cdb83883ef37d38f295e87f32677184dd8cd36273cabde1463a82f3a1ac907d
font_01_sfnt_off0000fef9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF9 10436 bytes
SHA-256: 097838775ee7829423b2cd2fcaaf7f7e677e41ae1e6e05a8cdcc1e78a712bb0e

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