Malicious PDF — malware analysis report

Static analysis result for SHA-256 0994a01d6d932717…

MALICIOUS

PDF

82.9 KB Created: 2021-03-14 18:58:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 06533c25cc8c2536ff0a582400b376f8 SHA-1: 54cc4193c2e1310dbeb6d0621833f05a6cdcc074 SHA-256: 0994a01d6d9327173aa5c8c49c255b20804bfcaeabde63fc1904f03da37b5c66
194 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggest this malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence score point towards a phishing or redirection scheme, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://vilenefex.ru/123?utm_term=hypertension+in+pregnancy+guidelines+rcog PDF link annotation
    • https://dapifakefigev.weebly.com/uploads/1/3/1/6/131636612/9b6bfc4.pdfIn PDF document text
    • https://nonadokemiraf.weebly.com/uploads/1/3/0/9/130969568/9445957.pdfIn PDF document text
    • https://jakoxizejibak.weebly.com/uploads/1/3/4/3/134348863/6aedba9eb61.pdfIn PDF document text
    • https://vudefuzafovafid.weebly.com/uploads/1/3/4/6/134630521/b0ec92ec.pdfIn PDF document text
    • http://sexugaweguko.iblogger.org/luis_cernuda_ocnos.pdfIn PDF document text
    • https://rokegijigu.weebly.com/uploads/1/3/5/9/135978077/xifikafexepu-xukuzevasoka-jibejiko.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://3c1ad7ec-bfc7-452d-a92a-0d22078d3251.filesusr.com/ugd/c6e823_54c04ac9daf443379e8da46b334e0206.pdf?index=trueIn PDF document text
    • https://95c758d6-fd33-43c6-b5d0-f1f55e07e946.filesusr.com/ugd/cb0188_b0226c117ca04f81babed38382d188a2.pdf?index=trueIn PDF document text
    • https://893c8be9-d140-4a04-8a3e-66bd54b472cd.filesusr.com/ugd/efd7ea_c11c9ff2127b4566b55e7003f8b10d5f.pdf?index=trueIn PDF document text
    • https://156bb51f-0b62-477f-88ca-8620af00812b.filesusr.com/ugd/e3ff21_618e6b75c901474483dcbb8ce1614f5f.pdf?index=trueIn PDF document text
    • https://f62823ea-e863-4eb7-bd7c-e3bac0139ff1.filesusr.com/ugd/8c639a_411c4c2c0d024c3a903c2fd43ab2b599.pdf?index=trueIn PDF document text
    • https://3ae4d138-4ba3-4962-98fb-1b98b40a6a82.filesusr.com/ugd/38062a_84662377addf4121a51a5cc938472fc4.pdf?index=trueIn PDF document text
    • https://77a80da1-97a3-4b40-ba11-54c6d232eb66.filesusr.com/ugd/39a0fd_774afa497531452fbb2239bb5d6a0edf.pdf?index=trueIn PDF document text
    • http://bodufusuviv.epizy.com/bootstrap_registration_form_template_with_validation.pdfIn PDF document text
    • https://a694a867-b0fa-45cd-b082-7f9abf80b1a7.filesusr.com/ugd/430cb2_1b69118f2896493cb711d598138d0918.pdf?index=trueIn PDF document text
    • http://gefifeji.rf.gd/runuzagupenimotosorogo.pdfIn PDF document text
    • https://2c8134a4-d865-4da1-8961-c755d7242105.filesusr.com/ugd/6dcf04_240f3843aa2e466bb2985265474229ed.pdf?index=trueIn PDF document text
    • https://4f0754e2-f0c4-47db-826b-83042027646c.filesusr.com/ugd/7a11b0_ec242c1df3564b2ba6336ea7f238e68e.pdf?index=trueIn PDF document text
    • https://c245485c-e1a4-4c5a-9a2a-c465a95e53c8.filesusr.com/ugd/25f824_3def8b7c3b62442390cab88ddded96f5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa6101c4-6563-482d-a367-6725f83d82a6/18682126343.pdfIn PDF document text
    • http://pibunowawoxi.epizy.com/jquery_ajax_call_form_data.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae6f7b26-7a0e-4bc1-a746-4f7d3524b9d8/50557788929.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F4 5188 bytes
SHA-256: 90b2c5f2486d22bf6004cfc565be7ee9a8c8f0186e7b885c2e4d19220710fd8d
font_01_sfnt_off00010aa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA6 10952 bytes
SHA-256: d7d3864673ea6ac249eb67f3c8279b4a6b39461eaff337ec9553f4719d6693e1
font_02_sfnt_off00012fe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FE4 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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