Malicious PDF — malware analysis report

Static analysis result for SHA-256 e39ed8652080f76d…

MALICIOUS

PDF

89.0 KB Created: 2021-09-11 15:56:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e42272b1d90e75448a0d286d77705b80 SHA-1: 7f0c1c2782038a69aa049bbbcf150b57f9b8d0a1 SHA-256: e39ed8652080f76d29a58a5414dd5a2ca89240ddcebd973a51709845aacb43ba
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or malware distribution. Heuristics indicate it's a link farm and has been flagged by ML classifiers and ClamAV as malicious. The presence of external URIs suggests the document's primary purpose is to redirect the user to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://pistant.ru/uplcv?utm_term=housefull+2+full+movie+watch+online PDF link annotation
    • http://bobhendrix-law.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/68906325737.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133f31276980---zexeseko.pdfIn PDF document text
    • https://beta.nhatthiengroup.com/files/uploaded/files/ritizevava.pdfIn PDF document text
    • http://myphammonly.com/luutru/files/pabetowimotuxaj.pdfIn PDF document text
    • http://tpt.taipei/asset/uploads/files/93365446513.pdfIn PDF document text
    • http://metallpress.info/files/96485870124.pdfIn PDF document text
    • https://kaparatt.com/images/File/mozajuvakor.pdfIn PDF document text
    • https://ykitraders.com/UserFiles/file/74308097305.pdfIn PDF document text
    • http://cestovni-postylka.eu/userfiles/file/84743476524.pdfIn PDF document text
    • http://simsvizag.com/admin/uploadedfiles/file///69429812386.pdfIn PDF document text
    • http://mrybalko.ru/files/58401685960.pdfIn PDF document text
    • http://vibestedu.com/_UploadFile/Images/file/46605388678.pdfIn PDF document text
    • http://lactopad.com/uploads/files/tanakujanu.pdfIn PDF document text
    • http://moriefrusca.com/userfiles/files/jafitoxowadiboruzib.pdfIn PDF document text
    • http://phutungtdc.com/upload/files/ribumapinoxelovale.pdfIn PDF document text
    • http://dh-cell.net/ckfinder/userfiles/files/39300455720.pdfIn PDF document text
    • https://suma.ca/upload/editor/file/70288878043.pdfIn PDF document text
    • http://twtqedu.com/userData/ebizro_board/file/vitaranusezexal.pdfIn PDF document text
    • http://ewtch.com/upload/files/leruxurokigafov.pdfIn PDF document text
    • https://buffinvestment.com/upload/ckfinder/files/76303762672.pdfIn PDF document text
    • http://chinamakina.com/userfiles/file/zuraradagi.pdfIn PDF document text
    • http://labellebeaute.com.hk/ckfinder/userfiles/files/75755812657.pdfIn PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136958fbae3c---fevukizofufabenilu.pdfIn PDF document text
    • http://linza-market.ru/upload/files/2261370214.pdfIn PDF document text
    • https://attack.lt/images/files/78984792628.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_off0000f7c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010fde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FDE 10864 bytes
SHA-256: c664d3cb642022e6ef16da103c132e586deb9b2cc9ae2e88261e40177406dfeb
font_02_sfnt_off000128e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128E9 17596 bytes
SHA-256: 0c971d9c181ecae5b678d1e88f8b0bb79afe4cf692bf3a51f1d817aeaa0790a2

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