Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e63672b4214a385…

MALICIOUS

PDF

68.2 KB Created: 2021-09-06 23:53:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c45e3683ba1402ba81f81f79bfdae6f8 SHA-1: 06a1f250d390ab07cf3502d2e8d1351445e86cfe SHA-256: 1e63672b4214a385519a65666cbac154560addb9363e50c82153b4860c9afc1f
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links pointing to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users to malicious content. The presence of these links suggests an attempt to lure users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://wcfkenzi.com/ckfinder/userfiles/files/wozatenuwudad.pdf In PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/a35832c3a1ae52286b60c6846ab3e06e/meguvamuxuxuduvuturumi.pdfIn PDF document text
    • http://thetuckerfamilyreunion.com/clients/67950/File/deworuguvajadipurixipixap.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b57da8640db---34246625740.pdfIn PDF document text
    • http://nhadephoanhao.vn/upload/ckupload/files/kikutulepodegopituvepu.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c779a638d07---93786691216.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d28b64204---mutiruleraparisavasiz.pdfIn PDF document text
    • http://krukaiart.com/userfiles/files/86189678011.pdfIn PDF document text
    • http://zzquansu.cn/d/files/jileteponimig.pdfIn PDF document text
    • https://rajatotogroup3.com/contents/files/47510672264.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607becd1eeed8---61733931852.pdfIn PDF document text
    • http://laiksmodalux.lt/app/webroot/uploads/userfiles/files/ximokiminalaxeniwumi.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/77b976137d891ab79bd28a8367c5616c/movegejev.pdfIn PDF document text
    • https://equipelec.fr/ckfinder/userfiles/files/79863344229.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f974d4c176---larevunobosoxedenakamopan.pdfIn PDF document text
    • https://pisangmanis.com/contents//files/57413340563.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4f632e20a---fudenivijig.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160849d0d379b7---mifijivifariwazisoxum.pdfIn PDF document text
    • https://mintedimages.com/ckfinder/userfiles/files/61394554476.pdfIn PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/e780a923e1ac9437c4bf987bc67e9543/zukulukamivowogazoba.pdfIn PDF document text
    • https://uleshuzataruhaz.hu/files/file/54598315499.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/16089aa4aad43d---57800388270.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=anabond+202+msds+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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000affe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFFE 14456 bytes
SHA-256: 48a5a0e772b8d401b8b0c9594fea0ba7ad97c01bb8c856dfa2308109972c6fa9
font_01_sfnt_off0000d442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD442 10556 bytes
SHA-256: c98e826d952e7ba1584d7f749f94e670994222a98ff02cba9e5b4e44a3a92c52
font_02_sfnt_off0000ec25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC25 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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