Malicious PDF — malware analysis report

Static analysis result for SHA-256 d900df3cc64ec51e…

MALICIOUS

PDF

76.7 KB Created: 2021-04-06 09:46:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 9330f798586d3819a73ab1bec4eee86a SHA-1: 568164e0d8c4910e2302e247e07f659d566caa22 SHA-256: d900df3cc64ec51eeef056d33fb5317fd4838616c44304f0b1f8835d3b38a411
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://kuzutuzo.ru/aws?utm_term=what+happened+to+your+voice+i+have+coronavirus PDF link annotation
    • http://vorecan.space/confessions_of_an_advertising_man_freez53hk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403410/normal_6010d7d1a1f64.pdfIn PDF document text
    • http://compte-cmbretagne.best/218684745710bpbp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450723/normal_60353b728e806.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471688/normal_605dfe534a486.pdfIn PDF document text
    • http://feelslike35.com/formato_para_mantenimiento_predictivo41k1w.pdfIn PDF document text
    • https://cdn.sqhk.co/mizosamox/fieCyhe/download_game_table_tennis_3d_mod_apkpure.pdfIn PDF document text
    • https://cdn.sqhk.co/tireronerogo/6ieQm2h/adobe_caslon_pro_font_free.pdfIn PDF document text
    • https://cdn.sqhk.co/xubewarow/AgebWhd/19490393743.pdfIn PDF document text
    • http://eagleaff.com/70572934054kdabm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414335/normal_6049be5b45457.pdfIn PDF document text
    • https://cdn.sqhk.co/lowilufape/3Xihhhv/wapogeta.pdfIn PDF document text
    • http://uose.xyz/48789341828bx31e.pdfIn PDF document text
    • http://hotsales-com.xyz/how_to_factory_reset_kindle_481zn7.pdfIn PDF document text
    • http://creditscorehelp.info/chapter_8_section_2_formative_assessment_chemistry_answersabmvk.pdfIn PDF document text
    • https://cdn.sqhk.co/debefuki/vAhjogh/65336208375.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/6ef63edc-c72b-4535-a646-3a259c1d6471/18586443728.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/51897842149.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/what_can_i_use_if_i_dont_have_brandy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e36582b-55cc-40cd-b88a-08137f1e8227/data_structures_in_c_notes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66002866-865e-448d-8547-104b5c8bd0ef/what_oil_goes_in_a_eaton_transmission.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

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED60 5304 bytes
SHA-256: 11718b4cef2517829915895aef8a6714f78e0eefdf137f421fb7d31397e21a70
font_01_sfnt_off0000ff79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF79 11068 bytes
SHA-256: 565856ecb120e0a6b6bdb7839eec6e8fdc10de8773ea32401a1ac6e93a7480b4

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