Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ee2a0cad7927e69…

MALICIOUS

PDF

97.1 KB Created: 2021-03-31 17:18:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5061998a75da5af887b638d63da118be SHA-1: 11164f583b328a8fb79a221fc942b2e693574b80 SHA-256: 6ee2a0cad7927e69f6b775e4f8724236c39133420ca9f5a76da991a35385d4aa
186 Risk Score

Malware Insights

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

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 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/123?utm_term=vanilla+wow+1.+12+macro+guide PDF link annotation
    • https://sunivisoxeban.weebly.com/uploads/1/3/4/4/134493344/mikufa.pdfIn PDF document text
    • https://nogulakotu.weebly.com/uploads/1/3/0/9/130969216/fubuwularozupe.pdfIn PDF document text
    • http://jedugefipevama.iblogger.org/6407805831.pdfIn PDF document text
    • http://bettermoneytips.com/42464671612gql2q.pdfIn PDF document text
    • http://lnstagram-verifedbadge.com/how_to_use_apple_watch_for_marathonnmedx.pdfIn PDF document text
    • http://operationhomeplate.com/denujozenubn29mp.pdfIn PDF document text
    • https://lewuseloti.weebly.com/uploads/1/3/1/4/131437615/554582.pdfIn PDF document text
    • http://xosuvirakogaf.iblogger.org/aircraft_structure_book_download.pdfIn PDF document text
    • https://wepejusekubikur.weebly.com/uploads/1/3/4/4/134441987/3564879.pdfIn PDF document text
    • http://emmetrix.net/pretty_little_liars_episode_guidembi7g.pdfIn PDF document text
    • https://jewezuwexokuj.weebly.com/uploads/1/3/4/7/134717424/9387720.pdfIn PDF document text
    • http://optamorem.com/does_best_buy_sell_polaroid_300_filmezk90.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e1d5fa5a-667c-4d22-bb72-2ec96b4ed0f7.filesusr.com/ugd/01f30d_d94cb19cf57043b8a227d9e5910d7390.pdf?index=trueIn PDF document text
    • https://a815f367-2516-4b88-9496-eed07d5c1eb7.filesusr.com/ugd/665c20_ae5ad5df8eda475ea371ed9ed7a8747d.pdf?index=trueIn PDF document text
    • https://f55c6975-0091-4942-a106-dc80285e5f9d.filesusr.com/ugd/8a4248_872dd10c9e304eb29ceb0a8dfb48fb6e.pdf?index=trueIn PDF document text
    • http://mujelinenifa.rf.gd/technical_analysis_free_ebook.pdfIn PDF document text
    • https://ecfc1f44-6648-4072-bff5-6ee4adcfbe4f.filesusr.com/ugd/e5a943_0ef609e5a44d4fd9844a7b51c882eda4.pdf?index=trueIn PDF document text
    • https://47e244ab-6b1f-4ae7-97e8-86de5b619f9f.filesusr.com/ugd/e1d12c_2d33ef500a0f4644a532cebeb8075675.pdf?index=trueIn PDF document text
    • https://101c3d73-5e22-4da1-a203-a3a2a794ce88.filesusr.com/ugd/69a512_46d06f0488fe4b51889c3d0cf133049d.pdf?index=trueIn PDF document text
    • https://76c9fb28-c10e-4950-85be-37de24a2ede8.filesusr.com/ugd/fa32a6_62a9ed62d1cf4635a7c929f08db3c00e.pdf?index=trueIn PDF document text
    • https://adc67df4-9ac4-4169-8225-f8d60376216a.filesusr.com/ugd/a1c2c7_0b4bc0f3fa9e4d9c86605099ff0ebbed.pdf?index=trueIn 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_off00012cc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CC3 5352 bytes
SHA-256: cf35699b305bf70f633e74ab1cb86b3ab9c1c2acfcc453ad718b8a0ea802343e
font_01_sfnt_off00013ef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EF3 5728 bytes
SHA-256: 34b644332485a071ce65de117dceb94ecfbc18e2afc5221f63cd4a62c40bba93
font_02_sfnt_off00014e5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E5E 11880 bytes
SHA-256: b935f206b74ed654df973e1224ee232f637c098394ed3982170e8c9dcad288a0