Malicious PDF — malware analysis report

Static analysis result for SHA-256 00e1b14166d27f74…

MALICIOUS

PDF

80.6 KB Created: 2021-03-12 03:45:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 1b705d9120e08eb12e67861c396c6d06 SHA-1: 5c97b7ef71c7991b801301c777b1d135944d46bf SHA-256: 00e1b14166d27f741e5be68f257c50496ff8de819b8d61289afb7d3507d867d6
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious content or phishing sites. The primary URL observed is `https://dugedepap.ru/123?utm_term=hypertension+guidelines+patient.+co.+uk`, which is likely part of this redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/123?utm_term=hypertension+guidelines+patient.+co.+uk PDF link annotation
    • https://fipupoluvov.weebly.com/uploads/1/3/0/7/130775710/1231091.pdfIn PDF document text
    • http://itsamorem.com/wejavish7i98.pdfIn PDF document text
    • http://lawyer-consult.ru/dometic_marine_ac_repairl53un.pdfIn PDF document text
    • https://rijigajigife.weebly.com/uploads/1/3/1/8/131856487/zepunoz.pdfIn PDF document text
    • https://tizemafuniture.weebly.com/uploads/1/3/4/6/134636649/1745488.pdfIn PDF document text
    • http://cpskras.website/10301757022v3txr.pdfIn PDF document text
    • http://ouily.xyz/bradesco_net_empresa_mac47nmy.pdfIn PDF document text
    • https://kumigovujubexug.weebly.com/uploads/1/3/0/7/130776874/jazewuk.pdfIn PDF document text
    • https://dugitesabisaxo.weebly.com/uploads/1/3/4/3/134392589/272bec6798.pdfIn PDF document text
    • http://bodyita.space/lowijoratemimafosel48sc.pdfIn PDF document text
    • http://game-pro.xyz/sat_books_to_studyi5kc9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://17673d3b-e5d0-4e0e-8211-f079fadf35f5.filesusr.com/ugd/13ae68_86425e32d57d424aa313830dd4be8de1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/80f6859b-f1aa-4e62-a2e8-a34692fc97b9/vejex.pdfIn PDF document text
    • https://1261df91-4e32-40b2-8b8a-4050d3c54cbb.filesusr.com/ugd/df69c1_93dfaf6e0d594c599d9be76f7323f9f8.pdf?index=trueIn PDF document text
    • https://7f1888b6-cdab-4603-9914-1cf81a8b29aa.filesusr.com/ugd/6846fe_7bf17fbd8fb741da98f7f6432ae7f6c8.pdf?index=trueIn PDF document text
    • https://cda84be5-0c54-4c05-8389-97bb004c798d.filesusr.com/ugd/fa9f00_7212d096cd2a42f1b8ba76322cfd05c3.pdf?index=trueIn PDF document text
    • https://e6676b24-921d-4f57-8fca-beda98688f3c.filesusr.com/ugd/144d27_5a1fa7bde44a423185a225a4cda9ebc1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/625009cc-f995-4414-a5c7-d5b5422ecacb/palubojaviraleti.pdfIn PDF document text
    • https://b064d0e4-88d6-4b7e-8087-8ebf790fcba6.filesusr.com/ugd/ca32a8_bd1c9bca28a44ef09efc1bec335011b5.pdf?index=trueIn PDF document text
    • https://67389751-14cc-4ed3-b660-7ef7239e4cc3.filesusr.com/ugd/bb5584_9dd4e484b52349b5998084b7b981c99d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/670c0260-9bd3-4be3-aaf0-57ba294a728d/sozinadedufuniluluxoner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16435046-fad4-4d6b-8a37-1149df65c222/common_spanish_transition_words.pdfIn PDF document text
    • https://71b4061d-0fbe-47a8-a671-08758978b022.filesusr.com/ugd/0216f2_8b11b8f4207e4ba5b82da5f443431f0e.pdf?index=trueIn PDF document text
    • https://4b4b92a8-4ac5-4030-97d5-af0917f8c077.filesusr.com/ugd/0251f0_cf8ab5db7be04775b6669c4db19a5eae.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_off0000fccb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCCB 5400 bytes
SHA-256: c51690e4bb00003b364edd66b23fd4e633f306d1562a80ed7149348d6f1d3a97
font_01_sfnt_off00010f41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F41 10988 bytes
SHA-256: 7ac57d3c109543df73d2325cbd29bd03b38e929afb6e6ea8c6942b1940502512

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