Malicious PDF — malware analysis report

Static analysis result for SHA-256 b484dbe348a2a7a0…

MALICIOUS

PDF

67.5 KB Created: 2021-03-14 01:25:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 249f487206a1926426b5debe1390c380 SHA-1: 9394b0dbebd0433f559638f46c59d2cf1e7058cc SHA-256: b484dbe348a2a7a0c0fb5ac8919f612399a72ec7d1f469ec7efaefd7c5620487
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a high concentration on disposable hosting, indicating a link farm designed to obscure malicious destinations. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically identified as a phishing trojan. The presence of external URIs and the PDF's structure as a link farm point towards an attempt to redirect users to malicious sites for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://lozipotod.ru/wix?keyword=free+musically+likes PDF link annotation
    • https://natufebopod.weebly.com/uploads/1/3/4/3/134305275/jifirixogovum_levejema_sebujere_tanipa.pdfIn PDF document text
    • https://xedasijaw.weebly.com/uploads/1/3/1/4/131453620/dabbb06cd.pdfIn PDF document text
    • http://pozijuza.scienceontheweb.net/what_is_an_average_salary_in_dubai.pdfIn PDF document text
    • https://nupetumagapet.weebly.com/uploads/1/3/1/8/131859993/tekudated.pdfIn PDF document text
    • http://fukazab.mywebcommunity.org/vimavodonajojel.pdfIn PDF document text
    • https://dibevapanowodi.weebly.com/uploads/1/3/0/7/130776811/dorelotu.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/23d78797-0a7f-4e5a-868a-0a4d5c085b37/ratios_and_proportional_reasoning_chapter_1_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/52924836690.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e81bc1fa-8673-483c-9c26-b87718a81183/xotic_effects_sp_compressor_bass.pdfIn PDF document text
    • https://s3.amazonaws.com/savifin/29974802764.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0799597-38a2-48a0-9eac-136318bb9c1d/sivomokogipobabujopobuzav.pdfIn PDF document text
    • http://rosajeku.myartsonline.com/why_has_my_chest_freezer_stopped_working.pdfIn PDF document text
    • https://s3.amazonaws.com/nuselufuzo/25984382031.pdfIn PDF document text
    • http://niwurekatexo.atwebpages.com/omnisphere_2.6_demo.pdfIn PDF document text
    • http://josesomesube.myartsonline.com/how_to_reorder_pages_in_adobe_reader.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/canny_opencv_android.pdfIn PDF document text
    • http://timojodabemisux.myartsonline.com/99515042247.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/excel_macro_range_different_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89e0c2a2-5782-496e-b581-25deb9b75500/16967129547.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_off0000cc39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC39 5068 bytes
SHA-256: cb1a44bd3663b5a0fffce4a1169f1317a494716e22cde6efca595a26ad6f0bdf
font_01_sfnt_off0000dd69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD69 10548 bytes
SHA-256: 295ab843dd2fea48da766f05924a19218a104c41f29ffe7c7f74f1a9928c1e09

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