Malicious PDF — malware analysis report

Static analysis result for SHA-256 af9dfbb226ec881d…

MALICIOUS

PDF

86.9 KB Created: 2021-09-12 07:57:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: bbbaee94b57de355e37bbf0b9d170624 SHA-1: ebb0a091f058aa3fe11b647fd244edeb74599577 SHA-256: af9dfbb226ec881d12d4beefb21e3aa27f251dd8fa3bc2a608912da7ad1b2cc5
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://smm-mm.com/uploads/news_file/jifufumemipuziwexaker.pdf In PDF document text
    • http://vxclouds.com/userfiles/file/tedodabexukegujegut.pdfIn PDF document text
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/92368165106.pdfIn PDF document text
    • http://onlinepravenconsultant.com/uploads/wysiwyg/files/20889505020.pdfIn PDF document text
    • http://odesignlab.ru/admin/ckfinder/userfiles/files/judosajarixemabubisenoj.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cff5e6388f---mefolo.pdfIn PDF document text
    • https://onderhoudnlgarantie.nl/upload/file/zodoremeboleturil.pdfIn PDF document text
    • https://geloracinta.com/contents/files/1360627120.pdfIn PDF document text
    • https://pakianco.ir/data/image/uploads/news/files/67586273685.pdfIn PDF document text
    • http://achwvs.love-mrt.com/upload/files/84373283286.pdfIn PDF document text
    • http://coinproject.com/userfiles/image/file/rumikipobisakegexi.pdfIn PDF document text
    • http://damutech.kz/upload/2021/09files/210901093311298061jta35.pdfIn PDF document text
    • https://sssmri.com/ckfinder/userfiles/files/pebimekelogasedi.pdfIn PDF document text
    • https://produktybhp.pl/pliki_user/File/duruwipurovinuseb.pdfIn PDF document text
    • https://wyslijpaczki.pl/app/webroot/files/userfiles/file/pebitasefibedorewipovavu.pdfIn PDF document text
    • http://ministerium.pt/files/62486035028.pdfIn PDF document text
    • http://syuncyoku.jp/upload/file/77117262091.pdfIn PDF document text
    • http://austria-ex.com/images/blog/file/pisit.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/de0c51acfb5b8acd5a87c39c3683369b/95267999264.pdfIn PDF document text
    • https://www.hmgfinance.com/ckfinder/userfiles/files/90992287953.pdfIn PDF document text
    • https://ebooksweb.net/files/file/rigitugewosuvo.pdfIn PDF document text
    • https://tjpapigroup3.com/contents/files/fobijovi.pdfIn PDF document text
    • http://hmsendo.pl/uploads/editor/file/30754034696.pdfIn PDF document text
    • http://axwelindia.com/uploads/21339622022.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=wreck+it+ralph+filmyzillaPDF link annotation
    • 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_off0000ed0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED0C 10612 bytes
SHA-256: c4323157b06ec8e65ed931c75ab7a4508628dfd549dbece54bab9de894e7ee35
font_01_sfnt_off0001055c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1055C 18844 bytes
SHA-256: b185d3d10392e6d25576ff9af40e99823c6693aaaadf288c2356f3e8dcd59825
font_02_sfnt_off00013605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13605 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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