Malicious PDF — malware analysis report

Static analysis result for SHA-256 17266fa4f6cde430…

MALICIOUS

PDF

94.6 KB Created: 2021-08-11 06:41:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 29ae648ce0d659593fb3530a96eec322 SHA-1: 6eb9a0becc7a5c75a72d56aace7c2dc7d528d2d0 SHA-256: 17266fa4f6cde4302aafa6eda0d08a018e93c628ca228c33ab40ca4edd50ea6e
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to websites utilizing compromised CMS upload functionalities, suggesting an attempt to lure users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/edf72e32c41adde69ee4b85bc86f07bb/xapumupefatamojilimos.pdf In PDF document text
    • https://watosaphotography.com/app/webroot/userfiles/files/20210811_112244.pdfIn PDF document text
    • http://bungefamily.com/clients/5233/File/89216946453.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/enb8scp25kivsd7nd57co098t5/vafawoxijunavagofafu.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160f66b8f860fb---kobov.pdfIn PDF document text
    • http://haiphongcontest.com/images/files/84549928996.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/6c8abedbef71db40e46cfb3760206577/28418240326.pdfIn PDF document text
    • http://laconchigliacasevacanze.it/userfiles/files/pobidoxa.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4e7f576e92---84343235824.pdfIn PDF document text
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/c254743038ee04159c7dcfd1e2e7203f/1911901636.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1d854cef29---32148693222.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fe50162131c---69046048787.pdfIn PDF document text
    • http://syarmarka.ru/userfiles/files/51292484233.pdfIn PDF document text
    • http://hawks79.com/clients/85064/File/patulixuzopuf.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16078dee437a98---80554531765.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/1f4a8164b58e7f28ca90380dcc1157bf/26486699422.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160e6bfdc4557e---39548162180.pdfIn PDF document text
    • https://starwebline.com/calisma2/files/uploads/zunumulukinopulofune.pdfIn PDF document text
    • http://chocoenglish.com/_UploadFile/Images/file/zipaja.pdfIn PDF document text
    • https://saatyapi.com/upload/ckfinder/files/4733276547.pdfIn PDF document text
    • http://geologocarmignani.com/userfiles/files/xipodofefono.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aebdf96f68d---53368109315.pdfIn PDF document text
    • https://usssecuritate.ro/userfiles/file/90429527695.pdfIn PDF document text
    • http://elencostruzioni.it/userfiles/files/45481257895.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=general+math+class+9-10+solution+pdf+2021PDF 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_off0001092a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1092A 17904 bytes
SHA-256: 248c818841c0308fce5642f11ee9c243d6afd27bf3b1454ef60b4ea1d4aaa0c5
font_01_sfnt_off0001383a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1383A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15051 11520 bytes
SHA-256: 99e08857751b041cb474ab6ed22c1912d3889f69b53efbbbeccd195953894d6b