Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e97aef285fafea1…

MALICIOUS

PDF

79.6 KB Created: 2021-09-11 20:04:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 4f5a5b4b69e78fdbf9cd339f28fa513c SHA-1: 7859218b9c0102d2e637407da8342160ad9e965e SHA-256: 9e97aef285fafea17c55bcb2e61fbb1692ec680b47cf4aaa96cee0d10048900e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The critical heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document attempts to trick the user into providing recovery secrets or private keys. The presence of numerous embedded URLs, many pointing to PDF files on potentially disposable hosting, suggests a link farm or redirection mechanism to further phishing or malware delivery sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://dwornawodzie.pl/userfiles/file/nefewo.pdf In PDF document text
    • https://projektovanje.info/userfiles/file/76441121832.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130d7555bce9---51684238952.pdfIn PDF document text
    • http://rdmsrl.it/userfiles/files/rijujevuzejibimexituxibo.pdfIn PDF document text
    • http://carneslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/65825108117.pdfIn PDF document text
    • http://cana.vn/uploads/userfiles/file/30799282707.pdfIn PDF document text
    • http://enidental.com/userfiles/file/20210905050424.pdfIn PDF document text
    • http://hotelbelleepoque.bg/userfiles/file/56937799786.pdfIn PDF document text
    • http://futuralagoparking.eu/userfiles/files/59815735901.pdfIn PDF document text
    • http://ucg-eg.com/userfiles/file/76279664265.pdfIn PDF document text
    • http://st-ark.it/userfiles/files/74035788807.pdfIn PDF document text
    • http://clinical-pain.com/pds/userfiles/files/xatewijip.pdfIn PDF document text
    • https://sanaspinler.com/calisma2/files/uploads/temowodevanavofuxaza.pdfIn PDF document text
    • http://electric-kernbichler.at/menulebidegomebamofetedi.pdfIn PDF document text
    • http://www.biogreeno.com/cms/ckfinder/userfiles/files/79596652486.pdfIn PDF document text
    • http://linkingpeople.info/userfiles/file/lifefalezaxatolumuf.pdfIn PDF document text
    • http://phongkhamthienhoa.org/images/files/zorexazubeperarofi.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16132d9d4114ee---54776348145.pdfIn PDF document text
    • https://eltonltd.ru/sites/default/files/uploads/pexifelurevomegivugel.pdfIn PDF document text
    • http://alessandrobelleseveterinario.eu/userfiles/files/wilesobenevevevosokav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=how+to+save+multiple+photos+from+facebook+messenger+androidPDF 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_off0000d0e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E4 17304 bytes
SHA-256: 55d9ea66048c6b58f3ca0ff2e68c9427d264565b5000ca6f8a14631ca1c707e4
font_01_sfnt_off0000fd67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD67 11544 bytes
SHA-256: ad94b5ca98747712ab74b9efb4cf821f2840c4256cd23cb8b359169b82635cd8
font_02_sfnt_off0001182b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1182B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1