Malicious PDF — malware analysis report

Static analysis result for SHA-256 20f10b80d39f8a7b…

MALICIOUS

PDF

83.7 KB Created: 2021-02-25 08:45:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 742d4ad5b9abe7e57ede7a1b4fe83f30 SHA-1: 2420cf8616aa8bf46a3bbcba6848b57b0c36a225 SHA-256: 20f10b80d39f8a7beb307c378b4a5196cf684de8b36290ccb32da5e9082dcbf7
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting services and are used in a link farm configuration. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of external URIs and the link farm heuristic suggest the document is designed to redirect users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://baarspo.ru/123?utm_term=nexus+10+price+in+india+flipkart PDF link annotation
    • https://nezejigon.weebly.com/uploads/1/3/4/6/134611081/347b0.pdfIn PDF document text
    • https://lebuwaner.weebly.com/uploads/1/3/4/4/134478239/duvewog.pdfIn PDF document text
    • https://cdn.sqhk.co/vimexuda/K4jiXig/minigames_minecraft_list.pdfIn PDF document text
    • https://cdn.sqhk.co/fupupusamun/WcVhjie/bet_plus_tv_shows_list.pdfIn PDF document text
    • http://maewallace.com/spaniola_pentru_incepatorix1izn.pdfIn PDF document text
    • http://info-pages.ru/age_of_empires_2_the_conquerors_expansion_cheatsnv54x.pdfIn PDF document text
    • http://allerlo.xyz/bushnell_yardage_pro_compact_800_manualzvlsj.pdfIn PDF document text
    • https://vugiwaxe.weebly.com/uploads/1/3/4/7/134739196/1194f.pdfIn PDF document text
    • https://cdn.sqhk.co/javomekoru/jcPLPmM/86296858836.pdfIn PDF document text
    • http://tlgfree.xyz/decimals_to_fractions_worksheet_7th_gradee9qo3.pdfIn PDF document text
    • https://cdn.sqhk.co/fuperule/ifLAQge/kulegekifa.pdfIn PDF document text
    • http://normaa-id.com/how_to_use_optavia_blender_bottle84fkd.pdfIn PDF document text
    • https://modedebakilab.weebly.com/uploads/1/3/5/3/135392074/8760977.pdfIn PDF document text
    • https://cdn.sqhk.co/libobivole/xhbNjau/godovuwonubuwujonet.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://fedorahosted.org/lohitIn PDF document text
    • http://lobopekogolo.onlinewebshop.net/92433141704.pdfIn PDF document text
    • http://donijexufenu.onlinewebshop.net/61190531088.pdfIn PDF document text
    • https://s3.amazonaws.com/dabatisew/ceaa_cumulative_effects_assessment_practitioners_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/elektron_analog_heat_mk1_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/wufajog.pdfIn PDF document text
    • http://makakanow.onlinewebshop.net/dbx_stock_zacks.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/chaar_sahibzaade_hd_movie.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C4 5216 bytes
SHA-256: b7475ecd3f9e76b90db7f9da81e799c36dc2693d6163531453f9c29d46272cb5
font_01_sfnt_off0000f696.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF696 10424 bytes
SHA-256: 11078c0e280c450bd164a782d00229054147c77990617ca4e4cfa31a4c55d534
font_02_sfnt_off00011a0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A0B 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
font_03_sfnt_off0001280b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1280B 7288 bytes
SHA-256: 74f94820ee9e0593cca02f399d9ab7c8af7597180979f6438a54a31fe13a4913

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