Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a01434c15b11c33…

MALICIOUS

PDF

73.6 KB Created: 2021-05-31 23:56:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: d1b556d35b998ea30109543330c027a6 SHA-1: f2334a18c2a5b95e5d8c15debe287068ca652af5 SHA-256: 1a01434c15b11c33035caf1ccb9c59d800863b45e9c90152b596345e5ba24459
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a page about losing weight, which is a common lure for phishing and scam operations. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://allytemp.ru/pbw?utm_term=dieta+para+perder+panza+en+una+semana PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4453575/normal_602c4400b34d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485457/normal_603e9a0db4932.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/b97e71e4-1ceb-4baf-8163-e9b7244c0228/what_does_1234_symbolize.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60da2dba-83b7-484c-8864-8048c178fe6e/43583870351.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ffc0dbb-ef13-4018-b2f6-d4ef0cfad01c/how_to_design_a_transformer_robot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d270610-af8f-437f-9c55-4d624dcc8795/94822526874.pdfIn PDF document text
    • http://xedidovetaw.pbworks.com/f/xarixugalu.pdfIn PDF document text
    • http://siwuromo.pbworks.com/f/xowotoxunipavejig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a8b126a-1a7d-4cf6-a788-e67f694f2414/best_entry_level_corporate_finance_jobs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8eda33f9-8610-4106-b570-0fcc17800510/36010111626.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f9aca71-fd1d-4fb7-89eb-aaa691242efa/bikadekeletawijisafidefek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a59bd22-e827-45fc-bcd5-f428bac42265/lozori.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2967c5f4-9ce1-4afd-bc53-eb98761ea9e7/5111953571.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/348eaa86-cd7e-4a5a-a81d-e2914657eba2/what_is_the_fee_for_usmle_step_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/065679bd-62a4-41e7-8855-00904a0db2b9/conjugacion_de_verbos_regulares_e_irregulares_en_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca58e170-b1f0-40c8-b19f-e08aebdc58db/dometic_rm2652_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16155a1c-bd48-441f-aff2-658ab9c40f27/big_star_pop_quilt_pattern.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ec2d846-6e4c-43c8-8b40-ee8233a8dc53/57999274629.pdfIn PDF document text
    • http://kapetipubi.pbworks.com/w/file/fetch/144426048/youtube_go_app_for_pc_free_download_new_version_windows__mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/729d1730-af4a-420c-b87c-23d8aece5187/57995384223.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38fa1919-e71b-4a3f-86a7-37288208cd8c/impossible_quiz_2_unblocked_66_ez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2fbfb48-b7a4-4b20-aee0-0c51abd1d0a8/100_most_common_phrasal_verbs_list_with_meaning_and_examples.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_off0000def8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF8 5120 bytes
SHA-256: ab15610dc0c7332129dd8397faa9b6079c4daa122ab4b2b72a3d45121aa29327
font_01_sfnt_off0000f05b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF05B 11772 bytes
SHA-256: d254a62eb96fcedbd7f2b5943df4e2cd5094948fbac0bd3ba215d703101a47b8

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