Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d15178471053f7f…

MALICIOUS

PDF

85.0 KB Created: 2021-09-20 04:13:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: cfa5acf38e34278eacee70ac436a6d2d SHA-1: a89a1313d7f2c17d34ca258bd5d7ff0f44f49379 SHA-256: 2d15178471053f7f47f4e8423fdcf53d3faeddfd23e8a8dfaecbbd299b3d7ebc
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs, including one pointing to a raw IP address, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URI findings point towards a common phishing or malware delivery pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://archism.ru/uplcv?utm_term=dragon+ball+z+map+minecraft+pe PDF link annotation
    • https://belretail.by/ckfinder/userfiles/files/vamotavazagirudab.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/161445ec61c0cd---84190888715.pdfIn PDF document text
    • http://wgadget.com/file_media/file_image/file/welibov.pdfIn PDF document text
    • https://www.caissedesecolesdu5eme.fr/backoffice/ckfinder/userfiles/files/wasozibageti.pdfIn PDF document text
    • http://romento.com/uploaded_files/userfiles/files/29736785097.pdfIn PDF document text
    • https://viscom.bg/uploads/wysiwyg/files/vimegusofadizipiguge.pdfIn PDF document text
    • http://140.121.161.111/ckfinder/userfiles/files/kanasipowijosup.pdfPDF link annotation
    • http://mega-gold.com/userfiles/files/seguwupasebitimozu.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613610995792d---17307148032.pdfIn PDF document text
    • http://yarpb.ru/pic/userfile/48506413876.pdfIn PDF document text
    • http://piqiso.ru/userfiles/file/mavavezu.pdfIn PDF document text
    • http://mishor-uvk.com/uploads/files/67533567993.pdfIn PDF document text
    • https://eqonetech.com/upload/userfiles/files/31741176606.pdfIn PDF document text
    • https://investincarpathians.eu/app/webroot/media/files/viwosobukubofusiwuw.pdfIn PDF document text
    • http://energcomb.net/cms_enercomb/sgi_userfiles/userfiles/files/ruzofev.pdfIn PDF document text
    • http://gocchame.vn/app/webroot/img/uploads/files/94145079230.pdfIn PDF document text
    • https://sdhouse.info/ckfinder/userfiles/files/50642885581.pdfIn PDF document text
    • https://cartolmania.it/file/62613532818.pdfIn PDF document text
    • http://zerosquareonline.com/file/6664337421.pdfIn PDF document text
    • https://www.funes.gob.ar/ckfinder/userfiles/files/18067051234.pdfIn PDF document text
    • http://identik.hu/editor_up/norefosewul.pdfIn PDF document text
    • https://rh-h1tapi-turbo.com/contents/files/puduka.pdfIn PDF document text
    • https://red-adlay.com/upload/files/92864205976.pdfIn PDF document text
    • http://rakkhunnursinghome.com/user_img/files/xonoru.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_off0000e047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE047 10856 bytes
SHA-256: a6cae3faabe5e3c24bc9e831b00d18aea8364499ae67d76aea4c3a1041f86ff3
font_01_sfnt_off0000f91f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF91F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11131 19652 bytes
SHA-256: 32cd61cb258ea678f630684bcdb4d0dd1e659f6de1236ae92b3aa748afce78f6