Malicious PDF — malware analysis report

Static analysis result for SHA-256 3046a0c172c95295…

MALICIOUS

PDF

82.9 KB Created: 2021-09-08 12:00:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: bb650f16358750c68da380831b935501 SHA-1: 380f0a75557f8403d5d78335bbf23612dfad331d SHA-256: 3046a0c172c95295a16afd8dc28163db3c4de05a53500136a30f96a47f0b201b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of these links and the overall structure strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://surrattsville69.com/clients/8/81/8122276c22396d7fa0996010cc369f50/File/29547051370.pdf In PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e43a85afb6---wipulofumavala.pdfIn PDF document text
    • http://lubrifianti-auto.ro/files/file/pogukojo.pdfIn PDF document text
    • http://zkmeiqi.com/admin/ckfinder/upfile/files/vudakunuwosusi.pdfIn PDF document text
    • http://abcbyspu.net/ckfinder/images_store/files/bavadiwot.pdfIn PDF document text
    • http://alfadent-volg.ru/images_uploads/files/96157525693.pdfIn PDF document text
    • https://interativacorretora.com/fotosempresa/files/43161059592.pdfIn PDF document text
    • http://farmina.ru/uploads/files/59789694402.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/sporvla9bojnkfi52chs2r457n/57727985544.pdfIn PDF document text
    • http://hookmyweddingup.net/clients/73542/File/51037917834.pdfIn PDF document text
    • http://sahamit.net/userfiles/file/fedozijak.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16073e81b9d226---diviponul.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/fc5194c5c25da7365e17d3f327d8da48/40963565111.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/01486b65e6afe0a3f5cde4eae8b984ca/37905467177.pdfIn PDF document text
    • http://zsdbiopharm.com/upload/files/90263582659.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bacd96dbb67---bapem.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/nn8hbt6k7j01t4vasb2li1trd9/vepotezurejizupaxegukus.pdfIn PDF document text
    • http://szakkepzosiklos.hu/upload/file/jokuri.pdfIn PDF document text
    • http://terralis.net/catalogue_dynamique/file/sulesagiwabinidazotofox.pdfIn PDF document text
    • http://ottotech.center/userfiles/file/betajadepukijapulew.pdfIn PDF document text
    • https://www.ppmcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/auqjdg8v1dl9evmij0fnsfq6q3/47100708829.pdfIn PDF document text
    • https://sapsda.org/SapmaUserfiles/file/5301347478.pdfIn PDF document text
    • http://puppiesulove.com/clients/7/7f/7fa6d7836ea929643a3c23f4562b158d/File/83871854969.pdfIn PDF document text
    • http://kodemari.info/data/files/91998683728.pdfIn PDF document text
    • http://rmgoals.com/userfiles/files/8554978672.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3dedf224df---95220804341.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=military+mental+training+pdfPDF 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_off0000df73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF73 10660 bytes
SHA-256: 093b13fd2ba7d0e00ad13bc88e1b7d93b67de07c558cbc2a5d7de93b4669d8be
font_01_sfnt_off0000f79b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF79B 17832 bytes
SHA-256: 3e6b093dd1dd4a013318c0bf24ac257bced0ea03599ef938959f5ce3074d8af3
font_02_sfnt_off000125c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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