Malicious PDF — malware analysis report

Static analysis result for SHA-256 e085a311354441e7…

MALICIOUS

PDF

86.7 KB Created: 2021-03-28 12:57:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 7389db975e1e49979df5e5e7a1684ae3 SHA-1: 599ca877b188ea658939cc30c404ca538cd71759 SHA-256: e085a311354441e72baab9f8039659804e807336d6087e9e03d5776ee062525f
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for phishing or SEO spam. The primary malicious URL identified is 'https://xezojetit.ru/award?keyword=edema+pulmonar+pdf', suggesting a lure to a phishing or scam page. ClamAV detection and ML classification strongly indicate malicious intent, likely related to phishing.

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 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.
  • 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://xezojetit.ru/award?keyword=edema+pulmonar+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4476766/normal_601e23422f390.pdfIn PDF document text
    • http://hs-life.ru/52254730503sta8p.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417325/normal_6011ebf9e0a0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457854/normal_5fd91e2890bfa.pdfIn PDF document text
    • https://pepagefowajuna.weebly.com/uploads/1/3/4/7/134738543/20a4af49d1e1.pdfIn PDF document text
    • http://cocobeautybar.ca/jiziwalya1ob.pdfIn PDF document text
    • http://13millions.store/lithium_ion_battery_testing_methodsyi2r5.pdfIn PDF document text
    • http://roman-holidays.shop/34260622027wgchb.pdfIn PDF document text
    • http://naturebiolog.space/19253568503me8nm.pdfIn PDF document text
    • http://omoikiri.info/kali_linux_for_windows_10_iso6xc83.pdfIn PDF document text
    • https://mokabeninenaji.weebly.com/uploads/1/3/4/0/134013120/7563592.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421960/normal_601dce7756447.pdfIn PDF document text
    • http://mediaverifiedbadge.com/para_q_sirve_el_te_de_manzanilla_con_menta5wlnf.pdfIn PDF document text
    • http://marketeuro.pro/red_linen_cotton_sheets7o1zo.pdfIn PDF document text
    • https://karozazosepi.weebly.com/uploads/1/3/4/3/134316788/momop_kejogubumabozeb_xotoloxadagopi_zazojumav.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9cf93ecd-64ee-4ad6-afcc-f350577a7522.filesusr.com/ugd/c4dbd3_7dbc980e59d84b8c9e8683908dce0cdd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/music_audio_free.pdfIn PDF document text
    • https://52a1af19-6946-4c37-aba6-ab00a30e4874.filesusr.com/ugd/5dc3ca_5f7c251200dc45dca5669138cb25ed1e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/black_and_white_formal_dress_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/nosepevozux/perakulukipumawokiwajafol.pdfIn PDF document text
    • https://0cc2a7d0-6f33-4335-9ec9-554d9418487e.filesusr.com/ugd/cb4a18_167ad72bbf0d4224b836f975f96c1cd4.pdf?index=trueIn PDF document text
    • https://b67fa923-03b4-4d21-b555-95ff628d7525.filesusr.com/ugd/1d4b90_238d49a5f1e64bc8b4597677b6f72426.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/attendance_management_system_project_free.pdfIn PDF document text
    • https://7f3356c1-ec1f-498a-9d41-5b36c14d87b7.filesusr.com/ugd/98d33d_18dd6134dd9b4e6c90f394e7a62aec56.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001149c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1149C 4964 bytes
SHA-256: ee9c8529d389ee7eddf1751c7450cfc8ae7fbab7fe7edcfd93fb14709e9640f9
font_01_sfnt_off0001256a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1256A 12276 bytes
SHA-256: cab350b9dd39750fc7c86424323b27a6c42c3c1ed3aea5f573432578e0187def

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