Malicious PDF — malware analysis report

Static analysis result for SHA-256 95aa61aee7042abb…

MALICIOUS

PDF

69.4 KB Created: 2021-09-28 20:23:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 70ce47688f712ad3f93a28df5c717b52 SHA-1: 25d826ff468b61f85001da5f40cc5ef4d2c698f8 SHA-256: 95aa61aee7042abb447023f6176807ef1789e942d0815e533b7d691e9284fada
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs pointing to various domains, suggesting a phishing or malware distribution scheme. The PDF structure and embedded content are consistent with attempts to exploit vulnerabilities or trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://medvor.ru/uplcv?utm_term=android+pdf+reader+dropbox PDF link annotation
    • https://truckforceone.com/upload/editor/file/41594150021.pdfIn PDF document text
    • http://runnersavezzano.it/public/userfiles/file/24487336523.pdfIn PDF document text
    • http://zehanbiopharma.com/upload/files/39462817140.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/96083610043.pdfIn PDF document text
    • http://prmakeup.com/Image/files/zepugagilekipola.pdfIn PDF document text
    • http://normel.org/files/upload/file/megusigizot.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/16134a5c66171f---37737889907.pdfIn PDF document text
    • https://semut73.com/contents/files/90757197156.pdfIn PDF document text
    • http://orthopediedelft.eu/files/23624502249.pdfIn PDF document text
    • http://dichvubaove.online/upload/files/pogezuguteninolutopob.pdfIn PDF document text
    • https://sopkambing.com/contents/files/8469154464.pdfIn PDF document text
    • http://shtaket46.ru/page_edit/_samples/userfiles/files/94893143762.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f880480c0f---93820510119.pdfIn PDF document text
    • http://prochem.vn/images/uploads/files/94515889740.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/satuxujevuseso.pdfIn PDF document text
    • http://getsolarnj.com/userfiles/file/timokobosugazudifetetox.pdfIn PDF document text
    • https://eltdb.com/UserFiles/files/kizilotavijopor.pdfIn PDF document text
    • http://karimeh.com/public/userfiles/file/witesuzis.pdfIn PDF document text
    • http://myblindz.com/fck_user_files/file/nefitoduwimavuvaneg.pdfIn PDF document text
    • http://pscworld.eu/ckfinder/userfiles/files/wedarulagixolerisujiza.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/756b230970e5118d1b41ceadd0f9fc0f/molawixuzaralaziseropu.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021090515244419.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16134cb7f40fae---27496068212.pdfIn PDF document text
    • http://thaimassageboy.com/ckfinder/userfiles/files/zefabosigobiw.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_off0000af1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF1A 10404 bytes
SHA-256: 068ac686e8d1f4dc7e05af5275e2b3c7fe3ba57605279f8168e0c7d0682bf131
font_01_sfnt_off0000c683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC683 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000de95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE95 16144 bytes
SHA-256: 0725946f60ab50ed98c30d22dde8885f4b285ce1cee264f1c6b8009e34839ffa