Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ef00ce48796b1f1…

MALICIOUS

PDF

72.1 KB Created: 2021-09-19 00:48:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 24a3db46629a6b575fbc2f990cfa6f81 SHA-1: caac298305b928f46ea716455381f3512e3e2fad SHA-256: 8ef00ce48796b1f1a99386dd4ce7e2b6cbad4b75a204711f069d5cf15a0b2508
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and ML classifiers also flagged it as malicious. Numerous external URLs are embedded within the PDF, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a phishing or malware distribution campaign. The presence of external URIs and link farms indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://wastran.ru/uplcv?utm_term=yify+snyder+cut PDF link annotation
    • http://pascalparrot.com/uploads/assets/file/xomajorizefejitu.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1614655a3717a3---2177676102.pdfIn PDF document text
    • http://thingsantiquesla.com/userfiles/files/vimoretitasilisikagemoto.pdfIn PDF document text
    • https://chataigne-cevennes.fr/imgs/files/nusudodo.pdfIn PDF document text
    • https://fratellifurloni.it/file/65266773383.pdfIn PDF document text
    • http://highendschmiede.de/highendfiles/file/2317684383.pdfIn PDF document text
    • https://speeddating.lt/speeddating/ckfinder/userfiles/files/rutepekesijenemuloxox.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/18334040574.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/4cb53fa823201c9b8f5a240f283ecc18/kavufewo.pdfIn PDF document text
    • https://grandhotelbulgaria.com/userfiles/file/23141227260.pdfIn PDF document text
    • http://specimport.by/files/files/gatefijatatebowujiz.pdfIn PDF document text
    • http://tropo-design.com/ckfinder/userfiles/files/99920587260.pdfIn PDF document text
    • https://penal-garazh.ru/files/wodunikujexugidijokakilir.pdfIn PDF document text
    • https://martabaktelor.com/contents/files/30955349063.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/161325ac1d03f8---92946877924.pdfIn PDF document text
    • https://www.kindspring.org/inc/ckfinder/userfiles/files/kexofopezixufipuvoza.pdfIn PDF document text
    • http://testsitehq.com/ckeditor-ckfinder-integration/uploads/files/vofeduxupon.pdfIn PDF document text
    • http://flexa.cz/docs/file/koxuxarakutu.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/b638120a9386ef9bd0e847213e7846b6/firemegumaraxi.pdfIn PDF document text
    • http://lamexmarket.com/uploads/files/sigegajil.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b6fd4ac811---34621865246.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/87e08de41896a8330cb068358b172d79/bofepapuz.pdfIn PDF document text
    • http://dalhousieretreat.com/cote_dor_import/admin/ckfinder/userfiles/files/28644103319.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/5f892a7e6ed711d5875ce9b73f37de6b/buwomepejaxam.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_off0000b68d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB68D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEA4 10340 bytes
SHA-256: 641e8627b4346b204cb3f7a09650dae800f94a6414ba5a068cee1628f7495d54
font_02_sfnt_off0000e613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE613 17304 bytes
SHA-256: f44eac2d694360f0c5752f61f4aeca82fcccd5f007be1d324ce76427c9c88e9e

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