Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d98a54d778a8aaa…

MALICIOUS

PDF

78.8 KB Created: 2021-10-01 15:18:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 01b10ea6c974c426dfc52f2fd4ea2d3e SHA-1: e50478b6059fca0247f6832ac2da787c815a66f7 SHA-256: 0d98a54d778a8aaad4ed7ab10baa5fad6a4cf3714fbdc9aef7487033f4423456
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to disposable domains and are likely used for phishing or to redirect to malicious content. The PDF structure and the presence of external URIs suggest it's part of a phishing campaign, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://inwebjor.ru/uplcv?utm_term=bura+waqt+shayari PDF link annotation
    • http://zhuxintrading.com/uploads/ckfinder/files/20210916/16317988647242.pdfIn PDF document text
    • http://lingeriedediva.com/UploadFile/file/2021092518331973499.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/bamotepuzorexutamor.pdfIn PDF document text
    • http://shacklefordlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/95610347198.pdfIn PDF document text
    • http://kalkulacka-hypo.cz/userfiles/files/16918147300.pdfIn PDF document text
    • http://grafittipng.com/userfiles/files/lijuwixavagubudoge.pdfIn PDF document text
    • http://sziazsauto.com/uploads/files/48842482812.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/161368a1700fe8---bobadazowukobitirekejutib.pdfIn PDF document text
    • http://decorstore.eu/upload/file/lojuronokekagadodowukawut.pdfIn PDF document text
    • https://zd-zeta.com/uploads/files/202109190432171595.pdfIn PDF document text
    • http://centralgiving.com/media/userfiles/file/mipuzuvide.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/161496b554b4fb---13612867399.pdfIn PDF document text
    • http://jagodkaprzedszkole.pl/userfiles/file/zujagibawo.pdfIn PDF document text
    • https://ceylanotel.com/firma/files/pikejefurexasifiwijobifot.pdfIn PDF document text
    • http://www.ccengis.be/applications/ckeditor/addons/ckeditor/ckfinder/userfiles/files/31563627892.pdfIn PDF document text
    • https://mygenius.ru/admin/ckfinder/userfiles/files/vunadapotufa.pdfIn PDF document text
    • https://dmshospital.com/mm_engg/files/21373945503.pdfIn PDF document text
    • http://vhktn.at/images/content/files/60915852139.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/92516890353.pdfIn PDF document text
    • http://alicekhenrylawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/76105200767.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b18a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB18A 16696 bytes
SHA-256: 9dc14f3949b6e112fda8d88d5fecc6e1bcbafa595dd042d90694c2b80d908dee
font_01_sfnt_off0000c95a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC95A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e16c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE16C 20940 bytes
SHA-256: 3f0fc129531492683f87b1315ae36906ea1bdcf247e58e4c14055cf8b5b81e79
font_03_sfnt_off00011695.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11695 10300 bytes
SHA-256: 2105166329a97cce950991592e972ed750ed7748d09fa1438f7f3b3c4154439d

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