Malicious PDF — malware analysis report

Static analysis result for SHA-256 d25c3272c0547ef9…

MALICIOUS

PDF

74.3 KB Created: 2021-06-04 06:18:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: d9153509ed72c71e42f09de7a9675393 SHA-1: 57fe74dbcbeefffab3193461769f09d22673f32d SHA-256: d25c3272c0547ef91692683d08760d9fc713db55de7fc677844de4cbe06c5cdb
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs, one of which, 'https://drafthe.ru/pbw?utm_term=download+musica+da+youtube+online+gratis', is flagged as suspicious and likely part of a phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though partially corrupted, suggests a lure related to downloading music, which is a common tactic for phishing.

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://drafthe.ru/pbw?utm_term=download+musica+da+youtube+online+gratis PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://neruwuk.pbworks.com/f/15694432467.pdfIn PDF document text
    • http://fixulirulafa.pbworks.com/f/what_coordinates_are_diamonds_in_minecraft.pdfIn PDF document text
    • http://jutifakukap.pbworks.com/f/damofinamilijiwub.pdfIn PDF document text
    • http://bemulopawed.pbworks.com/f/what_is_a_accounts_payable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a6db4d4-0a0c-4cee-a313-e1968d4d1d88/properties_of_water_lab_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a3234b4-26fc-4a4b-8048-44ca170e027b/pitimolufe.pdfIn PDF document text
    • http://tusoxefum.pbworks.com/w/file/fetch/144587097/que_es_el_metodo_cuantitativo_de_investigacion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a860655b-250b-4f7d-90eb-449378cc4a83/what_does_it_mean_to_spread_the_newsom.pdfIn PDF document text
    • http://pefagisunel.pbworks.com/f/what_are_the_types_of_special_needs_plans_snps.pdfIn PDF document text
    • http://mapaduzipi.pbworks.com/f/where_are_cub_cadet_zero_turn_mowers_manufactured.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04cd064b-8f9d-4481-9ffe-ae1b9c8efdd2/60546808001.pdfIn PDF document text
    • http://zeladejan.pbworks.com/w/file/fetch/144470406/meccano_traction_engine_instructions.pdfIn PDF document text
    • http://pagorevet.pbworks.com/f/download_easy_frp_bypass_apk_free_android_host.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cbbfc7b-3f3f-4740-a2b2-34dda066e5f8/emperor_clock_company_fairhope_alabama.pdfIn PDF document text
    • http://tisowowuduwe.pbworks.com/f/wolfteam_bedava_nakit_ekme_2019.pdfIn PDF document text
    • http://kusarolox.pbworks.com/f/p1684_dodge_neon_2005.pdfIn PDF document text
    • http://kapetipubi.pbworks.com/f/flexible_work_schedule_agreement_form.pdfIn PDF document text
    • http://ropotupi.pbworks.com/f/45821791407.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0c30e39-496e-43e1-a710-e06c38bf0ba3/what_are_goblins_afraid_of.pdfIn PDF document text
    • http://bijinim.pbworks.com/f/95385653038.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_off0000e1e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E1 5592 bytes
SHA-256: 9842dd68bab553f090c7a5d26ebfe50dd4fbbb383ff2633795326e47b67bf1f1
font_01_sfnt_off0000f4ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4EC 11500 bytes
SHA-256: a3ca81a7d7947167f14762d1f6ed15908d56d746abbc352785fb96370d2e86e0

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