Malicious PDF — malware analysis report

Static analysis result for SHA-256 cafe5482f303874d…

MALICIOUS

PDF

79.9 KB Created: 2021-04-04 00:00:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4029e61fe0be4493fa2e58cecc8aac42 SHA-1: 54bffe42b7cafb88f165b1a74548d27ccc12ddca SHA-256: cafe5482f303874dc4961b022216b2b2806b2a76902876401395e87a63ef8438
126 Risk Score

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 0.9990

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://soxebez.ru/strik?utm_term=which+software+is+best+for+android+development PDF link annotation
    • http://jopkapopka.online/fixuwatanoy7nij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457298/normal_60472e5608816.pdfIn PDF document text
    • http://inter-kalinka.ru/free_lost_bubble_game_for_pcctm3e.pdfIn PDF document text
    • http://canlisohbetim.net/semi_formal_dress_code_for_christmas_party1ywii.pdfIn PDF document text
    • http://fajasated.mywebcommunity.org/abc_publication_chemistry_book.pdfIn PDF document text
    • https://cdn.sqhk.co/waxigapo/hpcy9ia/green_skin_dungeon_master_soul_stone.pdfIn PDF document text
    • http://gavediteriremuv.medianewsonline.com/xiwimujawe.pdfIn PDF document text
    • https://cdn.sqhk.co/jedetanepiz/3gdhiig/fashion_design_world_game_cheats.pdfIn PDF document text
    • http://capridigi.com/11407049725wdyff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379486/normal_60625a3154f6d.pdfIn PDF document text
    • http://f1l3download.site/dinenuvipotiloklnyh.pdfIn PDF document text
    • http://bukuminuwakub.mypressonline.com/mabiretinobub.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473619/normal_5ffea15d913ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470029/normal_605c8db254fa4.pdfIn PDF document text
    • http://bestplacefor.rest/frank_ocean_lens_v2_downloadvpymx.pdfIn PDF document text
    • http://mnatural.space/ncte_ka_full_form_kya_haifsvq9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391001/normal_60432e383771c.pdfIn PDF document text
    • http://civiliscmq.online/89328003080lahlc.pdfIn PDF document text
    • http://likelid.xyz/animal_4d_mod_apku1j5g.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://naxezutozotos.rf.gd/the_host_film_stephenie_meyer.pdfIn PDF document text
    • http://vibamegavisine.rf.gd/28709568070.pdfIn PDF document text
    • http://bimibukiju.rf.gd/3107223519.pdfIn PDF document text
    • http://lugenizuridaj.atwebpages.com/diagnosis_banding_psoriasis_vulgaris.pdfIn PDF document text
    • http://mepogevotu.epizy.com/homophones_homographs_worksheets.pdfIn PDF document text
    • http://muvekalufisu.atwebpages.com/lucifer_and_ahriman_rudolf_steiner.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_off0000ea24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA24 5488 bytes
SHA-256: 860e59203d22f8af64e143884cc6666e8d323ac64cd2cd20047b653bb68a2404
font_01_sfnt_off0000fca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA8 11448 bytes
SHA-256: ac21828b98009f751bc8cef1643c067fa56ea3fed2a288df6a5b410bdd5e7da7
font_02_sfnt_off000123a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123A2 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71