Malicious PDF — malware analysis report

Static analysis result for SHA-256 7045845ab3a1701c…

MALICIOUS

PDF

166.1 KB Created: 2021-08-28 17:37:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 96b90c5257ba64cb74d84ac263c86375 SHA-1: e2b6d0f40312c15d37f0379aa5c189564fedd36a SHA-256: 7045845ab3a1701c7bd8b28bb1ab6ec8e83398f42594c3db67e91b6bd7c4939b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, suggesting a phishing or malware distribution campaign. The presence of embedded URLs and the nature of the heuristics indicate it is likely used as a lure to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://bethelhanberryaaa.com/clients/2/24/2465ef4bb9bb1b7382310ae17d7cafeb/File/32799380099.pdf In PDF document text
    • https://deltagroup.bg/uploads/file/dolipejilonafimi.pdfIn PDF document text
    • http://instandee.com/Images_upload/files/tegub.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608eb4db1b771---79427181754.pdfIn PDF document text
    • http://vswet.ru/f/zododepikunupu.pdfIn PDF document text
    • https://cplastik.com/data/cms/file/59677075462.pdfIn PDF document text
    • https://cs168.tw/upfiles/editor/files/72976106430.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/92379655899.pdfIn PDF document text
    • http://northstarbaptisttyler.com/clients/a/a4/a4b4c2e389351fb2dee96c3f727c6a57/File/sunudotowediso.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160aa69da245d0---94106435188.pdfIn PDF document text
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/e81eef34794273db3e74a8475c70097e/60859423126.pdfIn PDF document text
    • http://beautybybelief.com/admin/images/file/fomumufel.pdfIn PDF document text
    • https://menuiserie-sainte-anne.fr/userfiles/file/47565888081.pdfIn PDF document text
    • https://unicornproduction.gr/wp-content/plugins/super-forms/uploads/php/files/e30bf81639794ea6b24ad2eec104e7cd/58419235877.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160729c7183dd3---96434195717.pdfIn PDF document text
    • http://riskhedgetech.com/uploaded/file/89852556610aa1df0402b.pdfIn PDF document text
    • https://shriramsteels.in/public/ckfinder/userfiles/files/50642409582.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/99e72048143d1c051b43de6e61c97701/3606590231.pdfIn PDF document text
    • https://baglab.pl/galeria/file/82177721225.pdfIn PDF document text
    • https://astdubai.co/userfiles/files/legaderu.pdfIn PDF document text
    • https://besteva.com/upload/files/29515472644.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/e841bd03ce3788b87c7b03213ef9b96c/4714720273.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/up45g6jgdr13s6rn3rjrqgpn68/majemaravevurefaxojot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=game+of+life+source+code+cPDF 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_off00021fa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21FA7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000237be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x237BE 10572 bytes
SHA-256: f3e42edde0bb5cd1d06a8598c18b949213af7e375b417b7ab681bc9f60f82bc4
font_02_sfnt_off00024fd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24FD9 22212 bytes
SHA-256: 48ef06b718422795b3181777578fbbef925611587fcc4a907c20e4f734fac5f4

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