Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ed3bebef78961cb…

MALICIOUS

PDF

72.7 KB Created: 2021-02-26 15:26:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: d0c406f0b817cb0337b94fb74b21db7c SHA-1: 2fa2fad607d43f6bbce478891e2a1466276d1792 SHA-256: 0ed3bebef78961cb9d804a3fe28d9917cae89b2863776cb31ddda90c45a40bdc
66 Risk Score

Malware Insights

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

The PDF document contains embedded URLs pointing to suspicious domains, suggesting a phishing or malware distribution attempt. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicates a pattern of creating numerous links on disposable hosting, often used for malicious purposes. The ML classifier strongly flags this PDF as malicious, supporting the conclusion that it is designed to direct users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://midufefew.ru/award?keyword=what+are+the+purposes+of+technical+writing PDF link annotation
    • http://dezurifu.iblogger.org/what_qualities_should_a_principal_have.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422659/normal_6010073121d83.pdfIn PDF document text
    • http://sdfsdfsdf.shaketorch.com/kenmore_convection_oven_not_heating_up_properly.pdfIn PDF document text
    • http://fullcreditreport.info/cute_child_status_videos5uz7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488315/normal_602fe0708f7ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413467/normal_600bfde8069ec.pdfIn PDF document text
    • http://dk-inc.xyz/lagu_blackpink_whistle_korea_matikiri8htfl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384145/normal_602d3ab20d802.pdfIn PDF document text
    • http://priz24.site/682441622066ud1w.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416660/normal_600bd9018e4df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414868/normal_60115dae28851.pdfIn PDF document text
    • http://prostotit.site/7519157831mmkkt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/neviwove/37863721794.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/kuvemunosujezor.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/tablayout_android_in_fragment.pdfIn PDF document text
    • http://vobogiv.rf.gd/badowuwawigarajizon.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/antivirus_microsoft_essential_64_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/19475803192.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/bipolar_treatment_guidelines_canmat.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_off0000df4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF4B 5384 bytes
SHA-256: 079bd4386453a2ce6c260d47e0db96b57e5edc4d9253fc6b61d7f4a44081885a
font_01_sfnt_off0000f1b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B3 10540 bytes
SHA-256: 379d91bb9993b2df58a3483554e20a199bc12de0e43fbf18460e798a2f0ae128

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