Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bb0c346a6be9440…

MALICIOUS

PDF

76.1 KB Created: 2021-10-05 05:15:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 90649c31f7f6ce39d5ee0c8bf97d963c SHA-1: 5dadffe0ce0b9ad35bd67318033df2dd1a1a8835 SHA-256: 0bb0c346a6be9440892a448e0f4f0f73081f7f123cfedd187e910ac9c75ab66c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised websites and disposable hosting, suggesting a link farm designed to redirect users. The presence of external URIs and link farm heuristics points towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://wsospice.org/uploads/userfiles/file/file/21846455833.pdf In PDF document text
    • http://sherwoodonionfestival.com/ckfinder/userfiles/files/12175933192.pdfIn PDF document text
    • https://altstudio.be/app/webroot/uploads/file/rizubipebot.pdfIn PDF document text
    • http://wksystems.net/HotelEstimator/userfiles/file/75156497710.pdfIn PDF document text
    • http://issaproject.com/app/views/panel/ckfinder/userfiles/files/linodonozemaxad.pdfIn PDF document text
    • http://acudrved.com/ckfinder/userfiles/files/mubumedisope.pdfIn PDF document text
    • http://foto-preiss.at/upload_files/files/42232192537.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613de2de2a140---pobobuzuwebabuto.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1615b52a1a5275---palazubekoli.pdfIn PDF document text
    • http://madiran-cruduparadis.fr/ckfinder/userfiles/files/4555312533.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615733d8894f6---65877634381.pdfIn PDF document text
    • https://www.meditech.cz/ckfinder/userfiles/files/pavisegobowexevunipo.pdfIn PDF document text
    • http://shengyaweb.com/uploadfile/file/2021091110100280.pdfIn PDF document text
    • http://fred-robin.com/ckfinder/userfiles/files/74285494693.pdfIn PDF document text
    • http://jlicentral.com/images/authors/file/42396771423.pdfIn PDF document text
    • https://oazapiekna.com/zdjecia/fck/file/79890127295.pdfIn PDF document text
    • https://viadagio.be/userfiles/file/fagipefawosebudogepi.pdfIn PDF document text
    • https://big-affaires.com/img/pics/files/moxubenoku.pdfIn PDF document text
    • https://coopinproject.eu/ckfinder/userfiles/files/22609134875.pdfIn PDF document text
    • http://ipsgroupjjn.org/userfiles/file/mofasexaxafadurajejadu.pdfIn PDF document text
    • http://vietsonplastic.com/uploads/userfiles/file/gisuvigirurizowavedix.pdfIn PDF document text
    • http://zatexpress.com/upload/userfiles/files/zakikiboxapej.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16159db635bb1d---foguxoze.pdfIn PDF document text
    • http://zenkatsu.dk/files/kiwez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=simple+and+complex+sentencePDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7C2 10752 bytes
SHA-256: 692d82667f3af1ef3c4078a12cf06dd4d8951fa31600ca81b1822ec299781dd9
font_01_sfnt_off0000e070.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE070 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF882 16628 bytes
SHA-256: cf11056126e4eadcedea82587090f8b1b2304abc03abe4b172b57976839eef37

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