Malicious PDF — malware analysis report

Static analysis result for SHA-256 a50e68edde4ac2cb…

MALICIOUS

PDF

100.0 KB Created: 2021-08-17 05:26:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 004081f96d047418fe7e38e698f851b0 SHA-1: 22155e5300e9ee330befc2aa5c9e2d891f384ce2 SHA-256: a50e68edde4ac2cbf0c00a756d52f72615ce8754c79755e82ff74359631c6a39
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous external links, many pointing to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to redirect users. While no scripts were explicitly extracted, the nature of the links and the ML classification indicate a malicious intent, likely to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://irlanc.ru/uplcv?utm_term=roles+and+responsibilities+of+finance+manager+in+india PDF link annotation
    • http://teknis.it/userfiles/files/85658166147.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/fbe0ushcbsavibajdbh9ja1o30/jovajo.pdfIn PDF document text
    • https://bcbc3399.com/upload/files/69313824705.pdfIn PDF document text
    • http://alternatifmedikal.com/img/userfiles/files/joludupozikareg.pdfIn PDF document text
    • http://universalgroupautos.com/files/others/gamusuzawosevowejalebim.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/59706289667.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a11328e7f53---57969499603.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/30b688390d03ec98c4713fa9e828c5a8/47594468587.pdfIn PDF document text
    • http://web68s.com/upload/files/rofewe.pdfIn PDF document text
    • http://bekescsaba.varosom.hu/userfiles/files/vufedasa.pdfIn PDF document text
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/306987e037d7e81dd1e0e02ecac7e78e/55174194225.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ff35c5bc501---fatoj.pdfIn PDF document text
    • http://vanhacollection.com/images/files/17798819351.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/i19vs6povpebp9o9ddg12h6qu6/57861894650.pdfIn PDF document text
    • https://detector-billetes.com/Imagenes/file/keromoxemugajabila.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/69265792980.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ab15c5340e5---49037302261.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7b71e96d8f---biwedufafatunukideru.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aff8f26ac72---boluvibovogemev.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/ea6c27b66faf9de05216e8c452d8a1cd/gununewopenuke.pdfIn PDF document text
    • http://kfbi.ru/content/file/jamigotitak.pdfIn PDF document text
    • http://gphs84.com/clients/866382/File/33249752544.pdfIn PDF document text
    • http://mopron.ru/upload/files/82906281705.pdfIn PDF document text
    • http://knowleangling.co.uk/ckfinder/userfiles/files/babesemafin.pdfIn PDF document text
    • https://www.mtiwelding.co.uk/admin/ckfinder/userfiles/files/45158062969.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_off000126c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126C5 16028 bytes
SHA-256: 6f8eb3d36e6ee2de27d3af06844e6e116fdfe46db6cec4a6b33b00fe543f50e5
font_01_sfnt_off0001501c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1501C 11148 bytes
SHA-256: 501c3343ae692ce701e4d5f063755e5a72b2afe9cf98b4fb1c0c39fd7bfce7c7
font_02_sfnt_off000169b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x169B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.