Malicious PDF — malware analysis report

Static analysis result for SHA-256 04887383cae2dd6a…

MALICIOUS

PDF

81.3 KB Created: 2021-09-15 20:14:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f8a44e1e7746bcb52d9c4f10dda8e87d SHA-1: 60196a821a42a7f999ca8c75d68eaa7d1772c4ef SHA-256: 04887383cae2dd6a6213ab2ad323ad14c6e76c9ff53e222813a6bfee64cb3f90
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous embedded URLs that point to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these URLs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://garglob.ru/uplcv?utm_term=mulan+2020+online+movie PDF link annotation
    • https://aymexco.ro/ckfinder/userfiles/files/gipixiwerinisisisipinen.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613f1f6e84e5e---27594030612.pdfIn PDF document text
    • http://aallergy.friend-match.com/upload/files/34335073715.pdfIn PDF document text
    • http://www.aunay-sous-auneau.fr/ckfinder/userfiles/files/fuxuwokepiwoxad.pdfIn PDF document text
    • https://siriusdynamics.com/assets/uploads/files/67335993103.pdfIn PDF document text
    • http://aytekinpolatel.com/image/files/20584363900.pdfIn PDF document text
    • http://tobn56.com/UpFiles/file/28338161745.pdfIn PDF document text
    • https://unchiulmihai.ro/files/fckeditor/file/18331169667.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132045edc53a---97548975449.pdfIn PDF document text
    • http://kirsanov-maslo.ru/uploads/rixoxul.pdfIn PDF document text
    • https://colakcivi.com/userfiles/file/74558761342.pdfIn PDF document text
    • http://flixgolf.com/ckeditor/ckfinder/userfiles/files/25570275303.pdfIn PDF document text
    • https://akvanova.ru/sites/default/files/6537463655.pdfIn PDF document text
    • http://getsolarny.com/userfiles/file/xuvevufivezisurivawof.pdfIn PDF document text
    • https://breedlife.com/upload/files/diwamukuxuf.pdfIn PDF document text
    • http://heorungminhphat.com/luutru/files/99580213717.pdfIn PDF document text
    • http://renknh.com/ckupload/files/rosipix.pdfIn PDF document text
    • http://eclickapps.in/userfiles/files/72870609440.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/cfqlts413labdr6tnrq9jkbs91/21884631335.pdfIn PDF document text
    • http://ipsgroupjjn.org/userfiles/file/ritoga.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1613097daec389---74272718758.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1612fe2e54e47d---89550848033.pdfIn PDF document text
    • https://hostsolutions.ro/app/webroot/files/userfiles/files/58366972410.pdfIn PDF document text
    • http://occahomesearch.com/userfiles/files/lotaxajarinebako.pdfIn PDF document text
    • http://acm-medicali.it/userfiles/files/zitatibilukalat.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_off0000d914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD914 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF126 18312 bytes
SHA-256: e020c9484e96bc9de41f534533168902042506162b27506cbc9ca3d79bea42db
font_02_sfnt_off0001205b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1205B 10304 bytes
SHA-256: c8a7ebd258a7c62f25b268a01423a5f3203f0958a1d445743bc5c86774cbfbde

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