Malicious PDF — malware analysis report

Static analysis result for SHA-256 73887ee4a4a0eaf5…

MALICIOUS

PDF

86.1 KB Created: 2021-09-04 11:22:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 43a4323c4ac45242ba282fdeb38375f0 SHA-1: 566490d9cf628112a7df6103f82eda4fa346342d SHA-256: 73887ee4a4a0eaf58b3d5b7c04b14a024fddae11ee49548d10b0c93c6dfd8bfb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs that form a link farm, likely intended to redirect users to phishing sites or download further malware. The presence of these links and the overall structure suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://oniceh.ru/uplcv?utm_term=qatar+labor+law+pdf+2019 PDF link annotation
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdf8c1da936---29660115781.pdfIn PDF document text
    • http://gmkms.net/upfile_editor/2021/files/zobapigenu.pdfIn PDF document text
    • http://axi-hohenstein.de/userfiles/file/53733683358.pdfIn PDF document text
    • http://placc.info/up_image/latomamejegeganaruvosav.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/8655bbbead0ae9ce9d524f2b6443cfd3/wiwutup.pdfIn PDF document text
    • https://birudongker.com/contents//files/28546414408.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bca9667bb1d---seguzalamelo.pdfIn PDF document text
    • http://olneyjune65.com/clients/d/dc/dcef5d22f85ec69f5810ba62c2e8cf46/File/sodavajaxulomomuluvuz.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/30243979909.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160af83ad134ae---nutapidagifidig.pdfIn PDF document text
    • https://sanxuattrucauthangkinh.com/Images_upload/files/83375259270.pdfIn PDF document text
    • https://nhorizontours.com/userfiles/files/21323922666.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160f4600310b73---62486737995.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/pkgdil8qf6mutu4lf94hfha9b4/puworonodu.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/b4hldaoggkao0hdakmaq61bc12/60876585097.pdfIn PDF document text
    • http://www.motionmantra.com/userfiles/files/mojenabaxaxuleju.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/16079b4979cf30---28620044380.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c013c4cdab6---81874902144.pdfIn PDF document text
    • http://harrisonsfamilyreunion.com/clients/62911/File/82205370279.pdfIn PDF document text
    • http://ilksolar.com/Images/Media/files/87632129553.pdfIn PDF document text
    • https://www.swissfillon.com/wp-content/plugins/super-forms/uploads/php/files/5b0e924d4f5596e196787da33b2b5966/21952041397.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aae407b7de2---lotopiwunumalidoju.pdfIn PDF document text
    • http://dailymaydemtien.com/userfiles/files/50907148759.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_off0000edae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAE 17264 bytes
SHA-256: 48e59411e34c25cf2cbc7ed185b40ed8d65659855eada47475809f9887ac1f41
font_01_sfnt_off00011a59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A59 10740 bytes
SHA-256: f0a1c9fa706c04c6ed064f52964db9d82d773e10bf8f7556ab11cc063d53b83a
font_02_sfnt_off00013327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13327 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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