Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0be720e1ac4795e…

MALICIOUS

PDF

81.6 KB Created: 2021-09-07 20:21:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 07319666fd8d90f239b8d095e652a783 SHA-1: 8f250b43ef06866dc8180dc010d03dc8f28ffd39 SHA-256: a0be720e1ac4795e46d42b1df33c5a94f37e9d869bc97e8fc6545cffb8c80447
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to obscure the ultimate destination. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a malicious document, potentially leveraging embedded JavaScript for exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://cructi.ru/uplcv?utm_term=orthographe+fran%C3%A7aise+avec+exercices+corrig%C3%A9s+pdf PDF link annotation
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/5v2p4qn1mhmmel8vhg7nalvhhl/91375250545.pdfIn PDF document text
    • https://jagamimpi.org/contents/files/sinomewitufajogudulodi.pdfIn PDF document text
    • https://kurek-rowery.pl/user_pict/file/wodaxitivuvenedamurib.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f470ced7cdd---25744099213.pdfIn PDF document text
    • http://cgmorenanews.com.br/ckfinder/userfiles/files/95493275864.pdfIn PDF document text
    • http://aroma-es.site/yamituki-n/uploads/files/30779920334.pdfIn PDF document text
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/90319379877.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16070a92fb3b98---99994258199.pdfIn PDF document text
    • http://www.aportecnica.com/imagenes/editor/file/16557055082.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f2b44b8642---17271404270.pdfIn PDF document text
    • https://stpeterscbs.ca/ckfinder/userfiles/files/80879527099.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/9cqel2gm2lr0v3im8v06p8ga45/26339883932.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/2b76cd12e7239baea0c4a0db80ccfc82/1032957791.pdfIn PDF document text
    • http://arniestribu.com/campannas/file/79499810708.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087f739abf85---goligof.pdfIn PDF document text
    • http://pscworld.eu/ckfinder/userfiles/files/fokipebosenugivozeta.pdfIn PDF document text
    • https://sankaibearing.com/userfiles/files/80547994327.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086ee5a68565---namutumewajomalefej.pdfIn PDF document text
    • http://mayfamilycircle.com/clients/5/53/53cd9f4101e72b768929e5daf979c2da/File/64179237008.pdfIn PDF document text
    • http://big-blue-bus.com/pics/fotos/1/file/90286616652.pdfIn PDF document text
    • https://www.ebenisterie-burette.com/ckfinder/userfiles/files/rapak.pdfIn PDF document text
    • http://ingenermarket.ru/userfiles/17928268985.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160bd29ef49392---11772660415.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_off0000cfdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFDB 20720 bytes
SHA-256: 92b85ec81d6053b11379ef238a9597d2c5e99c7c84a67f592fee0236a13515b6
font_01_sfnt_off000103b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011bcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BCC 11396 bytes
SHA-256: 5d8fd151abbad109a3a54c73f881b1f7f66ffe87b48b1fcd4bcccbe4c6f19bdf

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