Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ef348d9bbfcfef7…

MALICIOUS

PDF

80.1 KB Created: 2021-09-05 14:54:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1b00dfcffe2f8d607cd3590b5799bd3c SHA-1: f1743902962777ae44128696bdd254d14b27b5f8 SHA-256: 2ef348d9bbfcfef7b2e8d37140a4c115a91a59b6137f103fa97cd4a94e676b26
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating it is likely a phishing or malware distribution lure. The document functions as a link farm, containing numerous URLs that point to various websites, including those hosted on compromised WordPress installations. The presence of these links suggests an attempt to redirect users to malicious sites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://kledingindex.nl/images/uploads/misewowutogo.pdf In PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7146c25bfe---86124951470.pdfIn PDF document text
    • https://myphambambi.com/webroot/img/files/wagoditanewitemuvapuragun.pdfIn PDF document text
    • https://jnvhardoi.org/ckfinder/userfiles/files/donurepababeni.pdfIn PDF document text
    • http://balogmihaly.hu/UserFiles/file/78198192786.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16080dbedd9e80---muwegeboximerepu.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608663311e65e---84017629048.pdfIn PDF document text
    • http://gdaniec.com/upload/files/jufosu.pdfIn PDF document text
    • https://syntellect.ru/Repository/file/subujanitekobo.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/16077ff6ede40a---robenamapidaj.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160ae32b2ef74e---31851916416.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/449ccaaf7aa7c4ff010dd0e4f23654cd/xemulopudelomebak.pdfIn PDF document text
    • http://kingalbertltd.com/uploadedfiles/file/97756497945.pdfIn PDF document text
    • https://romalasergroup.com/userfiles/files/jiwiniba.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/57ca0fe8a0547cc1b436905230fe9850/jupizori.pdfIn PDF document text
    • http://sahamit.net/userfiles/file/pupodaputajejivenumotafoz.pdfIn PDF document text
    • http://drjoecarver.com/clients/49355/File/67320910110.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608400c46da60---53994131506.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/6180e24937d3cd6c3cd980241803dcc2/52213439898.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/397a41841cbc9aab152cc73f313eac5f/39350292265.pdfIn PDF document text
    • http://aite-materials.com/upfiles/file/vawomatovi.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0efe425d63---gikatew.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/fspd1rih9f2mdua1r0pm43si1d/39641822785.pdfIn PDF document text
    • https://relans-nn.ru/images/docs/file/nigoripuk.pdfIn PDF document text
    • https://lasanisports.com/files/88798138168.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=attenuators+and+equalizers+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_off0000d5d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5D8 16940 bytes
SHA-256: 6fd4af218a0abffa9a6bdd97c15d72ef46a199441853843bda71b94f459d574f
font_01_sfnt_off0001018d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1018D 10780 bytes
SHA-256: 71d6214d9ed9656642c7cf985300cb081e7d2f1b067c6f98e57ce8602491b652
font_02_sfnt_off00011a4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A4F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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