Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a2601004c4165ae…

MALICIOUS

PDF

93.2 KB Created: 2021-09-20 08:52:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 4386f65e3bc47e7022a4a2a8f5d3b4ea SHA-1: 746521f3ac08bb59dc29aff5c134a2d8a9e05d9c SHA-256: 1a2601004c4165aef4e5cfba9cd20df9542560fd9ab19b95722b9f99d7d480dd
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs, with one pointing to a raw IP address, indicating a likely phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and URI findings are consistent with a malicious document, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://oniceh.ru/uplcv?utm_term=my+hero+academia+episode+1+season+3 PDF link annotation
    • https://culturasiapamplona.com/guiarte_userfiles/files/nasubejiz.pdfIn PDF document text
    • http://breakevenpoint.pl/uploads/editor/file/bujidarepedosunonaj.pdfIn PDF document text
    • https://wanfutemple.urwaydesign.com/data/file/userfiles/files/11697588846.pdfIn PDF document text
    • https://thietkewebseo.com/webroot/img/files/xeluxojugerejunuvos.pdfIn PDF document text
    • http://ayhancevik.com/images_upload/files/gamuwevewowawob.pdfIn PDF document text
    • http://bona-agra.pl/Upload/file/xuruga.pdfIn PDF document text
    • http://neogmbh.de/www/sites/default/files/userfiles/file/50588413676.pdfIn PDF document text
    • http://theheavent.com/userfiles/files/65312967691.pdfIn PDF document text
    • https://texasbordervolunteers.org/userfiles/file/gakixegijeludonevibewax.pdfIn PDF document text
    • http://deforma.it/userfiles/files/81897022979.pdfIn PDF document text
    • https://www.cdsale.org.au/application/third_party/ckfinder/userfiles/files/minojatuvonejir.pdfIn PDF document text
    • http://mweb.cz/images/file/63490867715.pdfIn PDF document text
    • http://wellogo.in/userfiles/file///xowenugozenodifixejizupe.pdfIn PDF document text
    • https://i-try.tw/upfile/files/2021/09/08/97252363249.pdfIn PDF document text
    • http://turhantur.com/turhantur/files/nazedozixixirux.pdfIn PDF document text
    • http://mitcostruttori.it/userfiles/files/23809022832.pdfIn PDF document text
    • http://140.121.125.49/ckfinder/userfiles/files/20210903_030706.pdfPDF link annotation
    • https://ewdel.cz/ckfinder/userfiles/files/97882877492.pdfIn PDF document text
    • http://paroissedementon.fr/upload/files/bejodenosozedavirukutanaf.pdfIn PDF document text
    • http://vsrru.ru/userfiles/file/41898726460.pdfIn PDF document text
    • http://digitalpolicycouncil.com/imagenes/file/kexukivafefadodo.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/52090af2b527a5f608cbc19788f4e785/60828908959.pdfIn PDF document text
    • http://studiomanzella.com/userfiles/files/22948461187.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10683 18164 bytes
SHA-256: 0de70dd3f82a0d764857211b5d5b5a10aa8ac2647c3253a276f3de8c7e1d689e
font_01_sfnt_off000135e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014dfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DFB 10968 bytes
SHA-256: 1f3ff4b2844d26c45a4c23e36072c68115b95a283238edfdac024a68a8faa5e1

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