Malicious PDF — malware analysis report

Static analysis result for SHA-256 038e449e4bc3c697…

MALICIOUS

PDF

71.4 KB Created: 2021-09-11 14:59:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: db33888115f31252f0b5a76663b125f0 SHA-1: acf0b19d39e3efe573e89bb41938687c78a21675 SHA-256: 038e449e4bc3c69777e29852633a57b909a23692ca98d6a27a7797a3ca60428b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many of which appear to be part of a link farm designed to redirect users to potentially harmful sites. While no scripts were explicitly extracted, the presence of numerous external URIs suggests an intent to redirect the user to a malicious resource, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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://pixomot.ru/uplcv?utm_term=love+gf+bf+shayari PDF link annotation
    • http://bn-biz.com/userData/board/file/11484773699.pdfIn PDF document text
    • http://fusheng-vietnam.vn/admin/webroot/upload/image/files/gamivuxezamawazo.pdfIn PDF document text
    • https://fedico.ca/upload/editor/file/77050576973.pdfIn PDF document text
    • http://z-sinpro.com/upload/files/33074527716.pdfIn PDF document text
    • https://svenjakretschmer.com/ckfinder/userfiles/files/mezuvoko.pdfIn PDF document text
    • https://webornate.com/viking1/uploads/files/18910801928.pdfIn PDF document text
    • https://indoshaolinkungfusociety.com/ckfinder/userfiles/files/32726465368.pdfIn PDF document text
    • http://hmed.vn/upload/files/55416917151.pdfIn PDF document text
    • http://fuguchair.com/upfolder/e/files/20210903013648.pdfIn PDF document text
    • https://implantsdentairesdesmoulins.com/upload/editor/file/vizalemix.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/0c10e9924e1fd6cb8b385532e2284c9e/rudunuririxibulularus.pdfIn PDF document text
    • http://sonsuadogo.org/Images_upload/files/nazifunegaxumumi.pdfIn PDF document text
    • https://saint-florentin.charcutier-traiteur.fr/ckfinder/userfiles/files/2055153234.pdfIn PDF document text
    • http://dealershop.es/userfiles/file/zisuzizoze.pdfIn PDF document text
    • http://mosjob.ru/images/file/12109383599.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/16134df84b0f46---13270377491.pdfIn PDF document text
    • http://pitchdecor-construction.com/user_img/files/kotinumodosisomigepodavik.pdfIn PDF document text
    • https://icon-studios.com/userfiles/file/4955101016.pdfIn PDF document text
    • http://sea-cruise.ru/ckfinder/userfiles/files/muwuruko.pdfIn PDF document text
    • http://as-eng.biz/userfiles/file/22050532851.pdfIn PDF document text
    • http://pb-book.com/user_file/file/43635056431.pdfIn PDF document text
    • http://www.offshoreyachts.net/web_upload/editor/files/gisaloxiz.pdfIn PDF document text
    • https://mobiligennari.com/userfiles/file/xewadikadotosibosemaga.pdfIn PDF document text
    • http://partnercable.com/files/gezowufe.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_off0000b455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB455 10520 bytes
SHA-256: cf2648cedd8095e7abee6708956e99f56cf6057e125b74ca7c0a6ecff4f82110
font_01_sfnt_off0000cc71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC71 16896 bytes
SHA-256: 9ad822ac170294275e156517581d289ed334584fd2b157905d899e5c994122f6
font_02_sfnt_off0000f841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF841 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1