Malicious PDF — malware analysis report

Static analysis result for SHA-256 978b3f3c0e4c02c1…

MALICIOUS

PDF

79.6 KB Created: 2021-10-04 19:35:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: ec4937c13e049049c1e36757096265eb SHA-1: ce008e0e3e51014651eb9f74cffd7238ced3b9cb SHA-256: 978b3f3c0e4c02c1a24356d230fbe7b62e981ed3aff101a98b8a03cbb579d08f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains and are structured as a link farm, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 http://rszm88.com/upfolder/e/files/20211002220905.pdf In PDF document text
    • http://dichvutot99.com/webroot/img/files/defuxuri.pdfIn PDF document text
    • http://sostrevalli.it/userfiles/files/befux.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1612f395acbf3c---82388174579.pdfIn PDF document text
    • http://dxczx.com/ckfinder/userfiles/files/20210924_191228.pdfIn PDF document text
    • https://wigs4less.net/nbloom/fckuploads/file/97170314220.pdfIn PDF document text
    • http://limobebe.com/userfiles/files/kawizitiwixipaveviriwox.pdfIn PDF document text
    • http://sampoernastrategic.com/uploads/image/files/jetomipojekufib.pdfIn PDF document text
    • https://a1-recruitment.fr/v2011/Files/fck_upload/file/43928592988.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/df2af2e58d02993672bde8233465c39c/23582143467.pdfIn PDF document text
    • https://brs.jo/userfiles/files/wetudewizafinujage.pdfIn PDF document text
    • http://gpshardorawal.com/hemkunt/userfiles/file/48939876692.pdfIn PDF document text
    • https://dallaslandscapedesign.com/media/files/71495311584.pdfIn PDF document text
    • https://beltamas.by/content/Files/52745256663.pdfIn PDF document text
    • http://cleaner.pl/userfiles/file/53660929853.pdfIn PDF document text
    • https://0908108108.tw/upfile/files/2021/09/28/futadozudanat.pdfIn PDF document text
    • http://daivupaint.com/img-chamthi/files/kelukupuwalazasuja.pdfIn PDF document text
    • http://kdwatch.net/upload/files/2021091215461062.pdfIn PDF document text
    • https://rm-parketi.si/uploads/75408754727.pdfIn PDF document text
    • http://yugang360.com/upload_fck/file/2021-9-21/20210921211529571942.pdfIn PDF document text
    • http://fsnmmaterials.com/UPFILE/userfiles/files/gitagajanalalikagufulojux.pdfIn PDF document text
    • https://km2804.com/ckupload/files/bevixe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=let+me+take+you+by+the+hand+and+lead+you+through+the+streets+of+london+lyricsPDF 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_off0000cc16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC16 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e42d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE42D 11328 bytes
SHA-256: 1219f3715d61ec7ebc2a6d6be177337c39da27abef5238b757d1bd6920f9ee38
font_02_sfnt_off0000fe66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE66 19044 bytes
SHA-256: d6d4c57e958ea12a4093a4914bf2ddce72108616290e02609872d83e120d0f21

Open this report in the interactive analyzer, or submit your own file for analysis.