Malicious PDF — malware analysis report

Static analysis result for SHA-256 32c3940add50b080…

MALICIOUS

PDF

87.1 KB Created: 2021-07-22 09:44:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7df0bbef3f100901a26b0755d76ad7ad SHA-1: f73554d8e859027fbe34bd9bf1d018bcbb666d01 SHA-256: 32c3940add50b080e3f934d919ff8c4e615fd81688103d29d8e57da1d3e6e973
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of these link farms on compromised infrastructure is a common tactic for distributing malware or conducting phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/h9f2emcbvhqm2p5drgivslmc72/dorurejewusaxovuletinekoz.pdf In PDF document text
    • https://pmeds.us/userfiles/file/zuperagugopobulo.pdfIn PDF document text
    • http://aranykoronakft.hu/userfiles/file/6503740129.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b06683ac675---xukizijevoxaxezi.pdfIn PDF document text
    • http://flooroverstock.com/admin/userfiles/file/62800741499.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16078def15e7a9---15058837853.pdfIn PDF document text
    • http://canigrup.com/userfiles/file/7792201333.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4e34734cd---21790380988.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608d1a088ba0e---26766619195.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/24913991891.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d395f1d9732---48871677209.pdfIn PDF document text
    • https://condominiovillage.com/userfiles/file/wovekukagojafulo.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160868e644d3f5---66047172252.pdfIn PDF document text
    • https://mehreganimaging.ir/images/upload/files/limunaniketaz.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f6b31a52f52---jugelulotewizoputomofa.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b48dd8a2f9d---50792548763.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160e982772532d---7240302043.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/k60rfcarp4pu1mn4p4a1ldsc4dpc4ore/kopupifekitajibedo.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b3642a40790---sugadasuxinelatofujimu.pdfIn PDF document text
    • http://istrouma1971.com/clients/9/9b/9b88b062b8d6af44b28e209fcb06d7d5/File/10424406845.pdfIn PDF document text
    • https://acryl-bg.com/userfiles/file/rebebidiwojiz.pdfIn PDF document text
    • https://mertlakustika.cz/images/pages/file/lavudibetep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=challenge+your+thoughtsPDF 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_off0000f228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF228 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010a3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A3A 17296 bytes
SHA-256: ff6e8d0aea627fb3fb2f96da4f4ac8b596fb20c0c7379d5af9a43cbfbcba3b99
font_02_sfnt_off0001375c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1375C 10540 bytes
SHA-256: b9d509d943fb6a4401982062bf46b114bdc85b95201d9bb94dbe85aeb78f65e9

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