Malicious PDF — malware analysis report

Static analysis result for SHA-256 cded507194ef5fcf…

MALICIOUS

PDF

81.0 KB Created: 2021-04-27 14:53:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2b97c5ca6eed9458f552b872bc72096b SHA-1: 9803dcb230e1bef69b57f84ce64321d7f9c377e1 SHA-256: cded507194ef5fcfff0b0d3b78bbc152940bccc91d64b784daa7535774f75743
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 0.9995

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://druttle.ru/strik?utm_term=shakespeare+sonnet+150+analysis PDF link annotation
    • https://cdn.sqhk.co/wifopuzuxiba/fZgijiA/bed_wars_minecraft_server_cracked.pdfIn PDF document text
    • https://cdn.sqhk.co/xojoweva/E5OPggx/tricare_prior_authorization_form_2018.pdfIn PDF document text
    • http://rollernefrit.xyz/welding_technology_free_downloadldrsl.pdfIn PDF document text
    • https://cdn.sqhk.co/xobabowiwa/u2ge2nY/xaselasimopuvanejufemi.pdfIn PDF document text
    • http://ersoil.fun/3825407631611ha1.pdfIn PDF document text
    • https://cdn.sqhk.co/wogefosa/GtGHjhi/xowokotunakorebobovasebum.pdfIn PDF document text
    • https://cdn.sqhk.co/sebuwemid/e3nhegd/conquest_of_empires_app_review.pdfIn PDF document text
    • http://tehnikator.ru/seth_godin_blog_every_day2kwro.pdfIn PDF document text
    • http://getporte.xyz/72206911292wgyli.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://gasigigi.rf.gd/fexikoliziserimetilo.pdfIn PDF document text
    • https://3e1d1bad-f645-4ebd-ac75-469e7ff7c972.filesusr.com/ugd/e745be_ad8300d8b8d64a4691001fa38a713edd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sojenozap/dometic_duo_therm_rv_air_conditioner_parts.pdfIn PDF document text
    • http://nemevefer.rf.gd/gakazak.pdfIn PDF document text
    • http://bamemuwibe.epizy.com/haldimand_county_waste_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/72697033715.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19ab7135-3c09-4522-b3dd-0ea9537c103e/bissell_proheat_powersteamer_pro_tech_manual.pdfIn PDF document text
    • http://lemaponu.rf.gd/satatawataden.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/jewigiforapezajejed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7a9c488-fcb1-4fe8-89b5-ec5b7bb7c44d/piano_sheet_music_book_free.pdfIn PDF document text
    • https://620678a0-8f5b-407b-881a-8a96a128c1c4.filesusr.com/ugd/25b7a6_abfaa429aeed4ea9998e61a2e6ee6ea7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea509126-40c0-4c7f-9e68-41ec773a12fa/kokopeguso.pdfIn PDF document text
    • http://pasufok.rf.gd/jononeseja.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f22a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF22A 5280 bytes
SHA-256: abb552bb1644928a88620da23e56cbfafa40b12b3eb636837e6cc678f8c43567
font_01_sfnt_off00010414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10414 10660 bytes
SHA-256: 9b9cae0bf3364c50d8b40eeb7235165d04c937b794121d4fa935c412158ea2c5
font_02_sfnt_off0001286b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1286B 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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