Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac25a8f399a98cac…

MALICIOUS

PDF

69.6 KB Created: 2021-03-22 11:12:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53ad6da21cceef40f66332d4372f2a0e SHA-1: 65e514882f120e7dc8c30ef2a353ce90680ec12e SHA-256: ac25a8f399a98cac50bf562d7c9c2d6d47dbf208a10521e6cf9b8941ad28c714
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or malicious content delivery attempt. The PDF contains a large number of external links, many of which are likely part of a link farm designed to manipulate search engine results or direct users to malicious sites. One of the embedded URLs, 'https://soxebez.ru/wix?keyword=the+flinn+clinic+bartlett+tn+38133', appears to be a primary lure. No scripts were extracted, but the structure suggests it's designed to host or link to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://soxebez.ru/wix?keyword=the+flinn+clinic+bartlett+tn+38133
    • https://cdn.sqhk.co/lukapokobejo/EjdqwEX/xosejisamolerodujaxo.pdf
    • https://cdn.sqhk.co/birugafomafo/hhRigC8/55781694003.pdf
    • https://cdn.sqhk.co/minamojazi/MRiezqx/stackers_medium_travel_jewellery_box_blush_pink.pdf
    • https://cdn.sqhk.co/rasirise/0hhddjj/fusosit.pdf
    • https://riwipawubo.weebly.com/uploads/1/3/1/4/131453561/7528225.pdf
    • https://cdn.sqhk.co/rotexopapi/igjjhfH/hack_beach_buggy_racing_2_mod_apk.pdf
    • https://xafovudomogagak.weebly.com/uploads/1/3/5/3/135324285/vafuwitara.pdf
    • https://cdn.sqhk.co/webepinovet/phivgiN/transmission_meaning_in_communication.pdf
    • https://giderolimarova.weebly.com/uploads/1/3/4/0/134098849/6b26985a19.pdf
    • https://cdn.sqhk.co/kikutajaz/9jdLygi/53702377963.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://67d298e0-85f4-4ad4-bf36-e1ac857e42fc.filesusr.com/ugd/b6bf5b_1b7b51bc2361407d97a21d356f402ad9.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f6a33e4f-375f-4529-9c78-bac2ef593606/jipapemunal.pdf
    • https://5637a596-61ce-4e67-8953-8fd9cb84b940.filesusr.com/ugd/c20ea7_7370b5464425495695933541b519dbce.pdf?index=true
    • https://uploads.strikinglycdn.com/files/820ac69b-1be1-4561-83ea-a6b1a5947a0e/adobe_photoshop_cc_2015_tutorial_free_download.pdf
    • https://d1ee23ee-9ccf-45b0-80ef-1e1ff1f657c4.filesusr.com/ugd/9ef0c3_f2498b55aa6245a3ae6cd45467f32f43.pdf?index=true
    • https://uploads.strikinglycdn.com/files/5bb32136-4ef5-42ce-922f-8607b1ed8d24/oxford_medicine_online_password.pdf
    • https://uploads.strikinglycdn.com/files/d992bd89-7342-437f-9d98-08bb605991d1/the_tipping_point_malcolm_gladwell.pdf
    • https://uploads.strikinglycdn.com/files/bd0a9a36-becd-4014-bbc6-334c98ff7e6c/2003_ford_focus_zx3_transmission_fluid_capacity.pdf
    • https://uploads.strikinglycdn.com/files/216b040e-9bdd-4379-ba4f-fde07b7b43c1/los_medios_de_comunicacion_respetan_la_dignidad_humana.pdf
    • https://5ee0d2ad-6486-47ce-ab7d-0e7b2bae4193.filesusr.com/ugd/bc0d1e_01dc041f95044cc0b45487223bbc7db6.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2fc.bin
5cc64b7dacf01e9c6941ae3a09478424dde6d3bd8dc6e203c280d70c0de1a67e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2FC 5292 bytes
font_01_sfnt_off0000e4fd.bin
ed7e6f75404d7172abddd21ea3c93211d7b1a7ee8fb5e543281251593b98ad83		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4FD 10600 bytes

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