Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0fb2ac283b3a031…

MALICIOUS

PDF

96.5 KB Created: 2021-09-19 09:28:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2390041ea80df6fa4c69c403a222af61 SHA-1: e1c9fac4a762f341d59aff712049f2167a3443fd SHA-256: f0fb2ac283b3a031a17c3d50a9e2242622fff0e9e9d91069d3b219023d4385b7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous embedded URLs pointing to external sites, many of which are hosted on disposable domains, indicating a link farm or phishing lure. The PDF structure and embedded content suggest an attempt to redirect users to malicious websites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://irlanc.ru/uplcv?utm_term=parlour+near+me+open PDF link annotation
    • http://marikitaberbagi.com/userfiles/file/napuju.pdfIn PDF document text
    • http://tid.vn/upload/files/80277664140.pdfIn PDF document text
    • https://hoatuoi360.vn/uploads/files/bodigesegugixudademi.pdfIn PDF document text
    • http://aerotechgroup.ru/img/outer/files/60769928856.pdfIn PDF document text
    • https://noriupapildu.lt/ckfinder/userfiles/files/nazutakat.pdfIn PDF document text
    • https://adminico.nl/userfiles/file/foriroduwapivubagije.pdfIn PDF document text
    • http://www.iuoelocal870.com/kaizen/ckfinder/userfiles/files/fofozarolivonetabar.pdfIn PDF document text
    • http://perksys.com/userfiles/file/manesodoli.pdfIn PDF document text
    • http://quiltingacademy.info/fckeditor/userfiles/file/96197572220.pdfIn PDF document text
    • http://5percent-design-action.com/upload/users/files/27604366795.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/387c295db43e371e2a57f7ce4602f201/mikanevun.pdfIn PDF document text
    • http://i-harmonics.com/upload/files/17464607405.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1613ea330004d4---dugijikakaxaji.pdfIn PDF document text
    • https://fidelishospice.com/ckfinder/userfiles/files/jugulibuwenefagape.pdfIn PDF document text
    • http://medwin.kr/userData/board/file/16990163053.pdfIn PDF document text
    • https://wita.lt/images/files/43303487898.pdfIn PDF document text
    • http://kmjmt.com/news/upload/file/2109052326116935873m9v8l.pdfIn PDF document text
    • http://boekenwinkelindex.nl/images/uploads/zaxipipiwenijerojorufoje.pdfIn PDF document text
    • https://suacuacuontoanphat.com/upload/files/geligukepusiso.pdfIn PDF document text
    • http://kriosispl.com/cote_dor_import/admin/ckfinder/userfiles/files/duwowegit.pdfIn PDF document text
    • https://triangle-electronics.com/assets/userfiles/file/74840449384.pdfIn PDF document text
    • https://bompentax.com/quangbasanpham/app/webroot/upload/image/files/53944372132.pdfIn PDF document text
    • https://fullmagicweekend.com/ckfinder/userfiles/files/nidatarijirizidaw.pdfIn PDF document text
    • https://edusfera.pl/upload/file/bitalazalakerakuka.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/48670856313.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_off000110e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110E1 19980 bytes
SHA-256: 10eccbb5ae3b99f75f6ea6e235d30d1bc4b094c28724f6bfed616c61559fd79f
font_01_sfnt_off00014556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14556 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015d6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D6D 10156 bytes
SHA-256: 8464915bd247ddb729da0f9444f6e5317a7010f15c26bfeea7e006e57fcac41a