Malicious PDF — malware analysis report

Static analysis result for SHA-256 464e2dd10745fdeb…

MALICIOUS

PDF

85.8 KB Created: 2021-09-16 18:11:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: fa6ce3383ae98d42d4b96eeaf7c705fe SHA-1: f82086929cfb1566f0eb2b044cfbbcab9863fcba SHA-256: 464e2dd10745fdeb22f6fef1a852347386bf073795b6a9ac81b4ec2b86fb0e42
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites, potentially for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://wastran.ru/uplcv?utm_term=practical+machine+learning+with+rust+pdf PDF link annotation
    • http://www.mattig-accounting.bg/fisiere/file/35232863788.pdfIn PDF document text
    • https://weyergans-hcc.lv/userfiles/file/91532655482.pdfIn PDF document text
    • https://funke.be/data/file/todupogomo.pdfIn PDF document text
    • http://space-edge.com/upload/files/25783284856.pdfIn PDF document text
    • http://www.vljainandco.com/userfiles/files/50302144563.pdfIn PDF document text
    • http://ceramicaartisticamarsalese.it/userfiles/files/gamerawuvopisotam.pdfIn PDF document text
    • http://orsini-blasioli.it/userfiles/files/sofudexekazajufulamarube.pdfIn PDF document text
    • http://teusz.pl/UserFiles/file/39009645227.pdfIn PDF document text
    • https://familienbilstrup.dk/userfiles/file/91841386609.pdfIn PDF document text
    • http://g-shocktou.com/user_file/file/639533316.pdfIn PDF document text
    • http://ytlcases.com/userfiles/file/65928059053.pdfIn PDF document text
    • https://bodymason.com/user_uploads/files/wilofasobemega.pdfIn PDF document text
    • https://najlepsze-w-polsce.pl/uploads/samol.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/47795590614.pdfIn PDF document text
    • https://csn-alliance.com/data/files/mejoxapijaku.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/moxavuzevisabanuzaro.pdfIn PDF document text
    • http://ledseoul.com/userData/board/file/riwonoxudisegejetomu.pdfIn PDF document text
    • https://cfi-registration.org/buzzboxgift/img/userfiles/files/vezosexuwanoropoz.pdfIn PDF document text
    • http://profstil.az/userfiles/file/94454247880.pdfIn PDF document text
    • https://khambenhxahoi115.com/images/files/53622661490.pdfIn PDF document text
    • https://littleitalypizzany.com/nbloom/fckuploads/file/buwitoko.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139160266408---vaxatewitovitav.pdfIn PDF document text
    • http://daisytalavera.com/userfiles/files/fanomawe.pdfIn PDF document text
    • http://speckletrack.com/update/editor/file/5594522671.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_off0000e7bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7BD 18240 bytes
SHA-256: d8b7e61a455e4632cc7a640ca6e58c226e1c4ab306124339d1d0bb8f8d051bc3
font_01_sfnt_off00011788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11788 11136 bytes
SHA-256: 2e89c2cbfabddcf2817672b6e4bac185670afe527a279f3912226e28a9ffe41d
font_02_sfnt_off0001312a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1312A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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