Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c8b1972f94398cb…

MALICIOUS

PDF

100.2 KB Created: 2021-07-22 20:59:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d0c0156e3881be470fa7478e0daeaff6 SHA-1: a102008a760a3aecea449b79eb16d696aea5eabf SHA-256: 6c8b1972f94398cbccbf581be75cf0efb1f6f22c205ae0067e2e22751d26a987
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by multiple heuristics and ClamAV as malicious, indicating it is likely a phishing or malware distribution lure. The file contains a link farm pointing to numerous domains, many of which appear to be disposable or compromised, designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9910

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 http://evevoyance.fr/adh/.-/file/tefokavevakulixijaduwom.pdf In PDF document text
    • http://luvnchrlysenglishtoys.com/clients/861429/File/17570036830.pdfIn PDF document text
    • http://dgjinhak.kr/DATA/upload/files/202105300321292871.pdfIn PDF document text
    • http://50wj66.com/clients/a/af/af9d65f11c1965a5434adcd4cd578f00/File/fupagalu.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9f9a4a2cd---59488200321.pdfIn PDF document text
    • http://microsolder.hu/userfiles/files/pumilaridilifoper.pdfIn PDF document text
    • http://spoanalyze.com/wp-content/plugins/super-forms/uploads/php/files/1a754e828bf55f85b021cdc8981b5632/63394163647.pdfIn PDF document text
    • http://janandpoos.com/clients/872640/File/xinen.pdfIn PDF document text
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606f212c2a6aa---68276113712.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080f0eaac187---5328691391.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/657a0fad36b8829d2d872d5023c036ca/82597599420.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4d3963bb34---85078289100.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/b59d4fdae9f9dfb6293b7b95c74caed2/xijosikaxupu.pdfIn PDF document text
    • http://ck-kutnahora.cz/gais/image/file/dewet.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/68253745705.pdfIn PDF document text
    • http://thanuyentea.com/ckfinder/userfiles/files/20624880732.pdfIn PDF document text
    • https://parquesanalbertohurtado.cl/ckfinder/userfiles/files/25949990779.pdfIn PDF document text
    • https://magyar-logyogyasz.hu/fileok/file/92361322593.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/16098c3e97ae03---32952820156.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad5a9507ba0---39462755195.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aebb3d860ae---kinejijesarobilagi.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/4fcf99ca1e9dc23024ceb46a169ae0ab/44270980323.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/fd2af8bc80eab437102764398b10d33a/94368874696.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af99932bae3---12202561033.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/9dfc11aa5bb3b908dc51ae61a211acf9/87721871705.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=carrying+a+chip+on+your+shoulderPDF link annotation
    • 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_off0001098c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1098C 10940 bytes
SHA-256: addc31d13dd427f51f6e6b38758bbd137238accba5dd0617fbf4de4a1c96f01f
font_01_sfnt_off0001229f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1229F 19068 bytes
SHA-256: 8294717f4b97dd1cd1e437cdb16e271036bc5418ea3375c438cf6eb3cf84092f
font_02_sfnt_off00015343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15343 16216 bytes
SHA-256: abc5cf41b1e3496ee95d4f1d756c49cfe304729c804ead8c763bf2440c81e2b3
font_03_sfnt_off000168eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168EB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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