Malicious PDF — malware analysis report

Static analysis result for SHA-256 21eda75fe9ef8ccf…

MALICIOUS

PDF

81.5 KB Created: 2021-05-14 15:11:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6ba6846f2dda4d910262e318f4e22e10 SHA-1: 5e48e82053515f5cb244b5cda69e5d4081b955b6 SHA-256: 21eda75fe9ef8ccf129fba2940d920669b2e4b69efe458a119e501eb5d25762f
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 0.9996

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://crophysi.ru/strik?utm_term=dewalt+miter+saw+10+inch+cordless PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4458388/normal_60481e1461d8f.pdfIn PDF document text
    • http://tetizeniwa.mypressonline.com/tuvopezuxorozisopijibopum.pdfIn PDF document text
    • http://mowogaw.mypressonline.com/network_screenplay_paddy_chayefsky.pdfIn PDF document text
    • http://tejowigasinafu.getenjoyment.net/xiviwatoruwovus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495390/normal_5fd26c5b6da0d.pdfIn PDF document text
    • https://cdn.sqhk.co/viliwogid/Xwjiyso/21571209612.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387410/normal_6044fccc63def.pdfIn PDF document text
    • https://cdn.sqhk.co/fepefudasor/ejdgjEc/gulewizoze.pdfIn PDF document text
    • https://cdn.sqhk.co/buzaxelubot/jcgcjdh/hattrick_youth_club_scout.pdfIn PDF document text
    • http://xevojifixifepi.scienceontheweb.net/93035844555.pdfIn PDF document text
    • http://dumubemajizukov.medianewsonline.com/livros_de_cassandra_clare_em.pdfIn PDF document text
    • https://cdn.sqhk.co/jebozibiru/Ggcc1jf/16208032918.pdfIn PDF document text
    • https://cdn.sqhk.co/pugijuzo/cMhdqXi/beziwitesiwawifexaxokisep.pdfIn PDF document text
    • http://ruwemipuwev.mypressonline.com/bruttoinlandsprodukt_definition.pdfIn PDF document text
    • http://zhenskiizhurnal.ru/singer_201-2_bobbin_tensionbq1iy.pdfIn PDF document text
    • http://apsmall.space/76737620348dsesz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427295/normal_601ca915e9819.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/dcf30ad3-5ed6-431e-bb97-07733560c548/whirlpool_duet_steam_washer_and_dryer_set.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da10ef9d-433f-4fa4-bcee-25e010711443/146481871.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/071a7f75-ab47-41cc-ad2a-eb8eab0c6be0/how_to_write_a_monitoring_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/091d5c08-82b0-4540-8ee4-836870683036/2010_chrysler_town_and_country_tpms_light_reset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df01a726-911b-4849-bd87-0a7ff4090e8e/el_seor_de_las_moscas_personajes_principales.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_off0000fe22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE22 5464 bytes
SHA-256: 272d2dfc304318b589eb7dee6ee16bfd70ef7fd2d120d5f5ea383e0ea602351f
font_01_sfnt_off000110a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110A0 12068 bytes
SHA-256: a1f72e7950871125aaf89adfacd94e3dcb43225cfbb0766c89fc6b43fa98cb19

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