Malicious PDF — malware analysis report

Static analysis result for SHA-256 73fe57ff7ba27b6b…

MALICIOUS

PDF

75.1 KB Created: 2021-09-21 05:34:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: bd788c8f13cfde845b37374d28263b95 SHA-1: 44f6f52071f5ce1a8de5207134ac4795bd87bcfd SHA-256: 73fe57ff7ba27b6b4dcb380c4d72f6e2e11bfc848b9551d6e6dc090101d0ce8f
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. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed to host numerous links, likely to distribute further malicious content or phishing pages. The embedded URLs point to suspicious domains, reinforcing the phishing and malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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=headway+upper+intermediate+fourth+edition+teacher%27s+book+pdf PDF link annotation
    • https://cordovajewelry.com/images/file/15660676033.pdfIn PDF document text
    • http://gpsputhuppally.com/userfiles/file/jizezuliropafedule.pdfIn PDF document text
    • https://sealand-pptc.com/userfiles/file/15527489204.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/pobaliwuvopalazepe.pdfIn PDF document text
    • https://12shio3.com/contents/files/dajudunutigij.pdfIn PDF document text
    • http://e2ingenieros.com/ckfinder/userfiles/files/nupuze.pdfIn PDF document text
    • https://alhasooncorp.com/Files/files/zigedijekegebebokupel.pdfIn PDF document text
    • http://euro-ex.com/images/blog/file/jepuzoniliduwosu.pdfIn PDF document text
    • http://kerekesvillszer.hu/UserFiles/file/gafafutuzokanufezapogu.pdfIn PDF document text
    • http://gniortho.com/files/Upload/file/67484130115.pdfIn PDF document text
    • http://regimhotelierbucuresti.com/images/userfiles/dozaxozusozusupuvavo.pdfIn PDF document text
    • http://m-camper.ru/ckfinder/userfiles/files/larenaxutibobizub.pdfIn PDF document text
    • http://kaies.net/upfiles/2109121849211373823tl1tr.pdfIn PDF document text
    • http://sksound.com/userfiles/file/54780193023.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1613365a538975---38659584211.pdfIn PDF document text
    • https://eghamatyab.com/basefile/bainbookcom/files/26079684711.pdfIn PDF document text
    • http://grandviewgroupresort.com/upload/files/jusanegebixow.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/7dc0016e7ebd44182ca1d8777902b636/vigolexurimo.pdfIn PDF document text
    • http://oris-am.com/editor_up/62691222527.pdfIn PDF document text
    • http://potentialdesign.cn/userfiles/file/1631496761.pdfIn PDF document text
    • http://senvietsystem.com/ckeditor/upload/files/55961977372.pdfIn PDF document text
    • http://doremimarlikinsaat.com/userfiles/file/27066475594.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_off0000bdd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDD3 17740 bytes
SHA-256: e7d7b16a466c5ad3e6f205ed6b0c8b2ab4c68c88ac535f07c0e50ab1c7927ee7
font_01_sfnt_off0000ec11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC11 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10428 11396 bytes
SHA-256: ea861fbb77cd9fad9f5e73e62bb492af91cb37d0a5559acbfd007012150ff972

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