Malicious PDF — malware analysis report

Static analysis result for SHA-256 6db466ae009e7bfc…

MALICIOUS

PDF

83.4 KB Created: 2021-09-04 12:18:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ed6cf58ccfd1822af135e0a239d6d227 SHA-1: 8e16104a68f2725d506811b392732e8ad868a9a8 SHA-256: 6db466ae009e7bfc6ec61c6e9d4ee56fa3194abb0777c29d4336572659092b8c
156 Risk Score

Malware Insights

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

This PDF was flagged by ML and ClamAV as malicious, indicating it likely exploits a vulnerability or contains malicious content. It contains numerous links to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The file's structure and embedded links point towards an attempt to redirect users to malicious content hosted on compromised CMS uploads.

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://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c512f3b4d89743e7994da352aa5407f1/89541231915.pdf In PDF document text
    • https://samudra99.com/contents//files/52315343113.pdfIn PDF document text
    • https://www.treehousecare.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607234d260e4b---niwumag.pdfIn PDF document text
    • http://lienming-rubber.com/uploads/files/202108181814147433.pdfIn PDF document text
    • http://studioarchperissinotto.eu/userfiles/files/gorumigifizevi.pdfIn PDF document text
    • https://ispartaorganizasyon.com/ckfinder/upload/files/84280387839.pdfIn PDF document text
    • https://schmitz.cz/res/file/fuguvinasoxutofatev.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/059dnco0orpsfruqdrthc6vcv3/69821841013.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160799bda59e7f---69350645773.pdfIn PDF document text
    • http://teleserviciomalaga.com/ckfinder/userfiles/files/93319875768.pdfIn PDF document text
    • https://annekienlen.fr/imagesfile/xitemejofuworupe.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/795b9e6263410cdd64b9752da412d9cd/47310796574.pdfIn PDF document text
    • https://www.mds-horizons.com/upload/files/femixifenibuzuni.pdfIn PDF document text
    • http://xn--9n2bn9mz3aba29g44r4o0a.kr/fckeditor/userfiles/image/nalipojewenu.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/1vhjpareh1ucoiaduc13gavs2d/fidirepavogi.pdfIn PDF document text
    • http://schooldistrictservices.com/clients/f/f6/f6ab1571d2cdf5e569af7b76e288b17c/File/zulilave.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/faf3b17d691b6e6ee430062c369c02ea/gepupugetigekosetipola.pdfIn PDF document text
    • http://sns.hu/_user/file/82096511616.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/15b555dcec75249209e335524b46f094/lorinedopiditogifofodaf.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ae9ffba5d74---wosugixeza.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/161198d1d5f2ef---94858865865.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/70545812ae7d5b489086908ef3a66e05/16720792845.pdfIn PDF document text
    • https://cooperspick.com/files/gemuluful.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=lexicon+thin+book+on+ethics+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_off0000e0b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B1 10700 bytes
SHA-256: 4bac6aa4115da1dc63348b6911f1bfc76c90da0723be337d0289b191c8fb166e
font_01_sfnt_off0000f8f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F3 18476 bytes
SHA-256: 9fc3fa7dbd219ee3760d86af634ee7278f04915ccb0150c2114edba810bf4dcc
font_02_sfnt_off0001287f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1287F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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