Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a33a26fdfd8e0d7…

MALICIOUS

PDF

76.4 KB Created: 2021-05-19 10:41:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7d67ae4d630d12599a872538f8f38c11 SHA-1: 76560d497adfc6e9caea2513aa39c2f6cd26cd74 SHA-256: 8a33a26fdfd8e0d748900a416bc834fce493094a3c33dbabe83ef1c590965148
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/strik?utm_term=perfect+pizza+base+recipe+plain+flour PDF link annotation
    • http://zavudonalu.66ghz.com/arjun_reddy_photos_wallpaper.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487005/normal_605ad2815fdf4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486221/normal_604b99ac96ef1.pdfIn PDF document text
    • http://vakekaninu.iblogger.org/bose_companion_3_series_ii_specs.pdfIn PDF document text
    • http://bumisemi.iblogger.org/the_brief_bedford_reader_11th_edition.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382621/normal_6008f509e6d31.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/7a7c71d7-7ff3-4e59-82ba-d3f00fee03b2/black_and_decker_8_cup_food_processor_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/mizikakexise.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c43ebed6-7381-4be7-95f0-0f95845d1497/how_to_build_a_website_using_wordpress_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b053cf0e-9b98-4aca-a23f-b574fde42fa6/defufebabim.pdfIn PDF document text
    • http://wuriwafu.epizy.com/16233830139.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/we_be_all_night_music.pdfIn PDF document text
    • http://basufalutu.epizy.com/what_is_the_release_date_for_baldurs_gate_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a45be76b-1cb3-41a0-81ce-235f4fbeda05/monsters_a_bedford_spotlight_reader.pdfIn PDF document text
    • http://beranaja.epizy.com/chemistry_the_central_science_chapter_1_answers.pdfIn PDF document text
    • http://zexumujadabexu.epizy.com/how_do_you_apply_a_style_set_in_word_2010.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/110ae6eb-8b26-4de1-8c7e-3207aa6718f9/lujanegotemuxikobozixero.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb9eaf33-68ad-4164-bb88-abf219b389f9/what_do_u_call_an_elephant_that_doesnt_matter.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/indian_railway_time_table_chart_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dea69fe-6cfa-46ae-9d1f-7ffade6725cd/jiluturuzofewewere.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f97dd2e9-afff-48cd-9165-7785aefa74da/samsung_55_6300_review.pdfIn PDF document text
    • http://pofulexurukuka.rf.gd/heparin_anticoagulant.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/711b7d5d-0e1a-4325-b60d-9fdd419bb6b1/kegitodifanutemagoruburit.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_off0000eed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED1 5200 bytes
SHA-256: 14ba2b6856a12be6993e8af30434dfdca9bdb2d46f1a0edc251b813c19a80eec
font_01_sfnt_off00010094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10094 10396 bytes
SHA-256: ae40562acd46322b1d659d07d75c100abd548bdffb52770c0f721f654201d8f2

Open this report in the interactive analyzer, or submit your own file for analysis.