Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba1abe32ca7f5c8c…

MALICIOUS

PDF

96.9 KB Created: 2021-07-08 01:44:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9728c084eacaa2af91fa6eef3ad2ca0c SHA-1: 04b10133abc5d978871547781098387a6e7be568 SHA-256: ba1abe32ca7f5c8c05974b8c8af0aa5af652f81ee26a90b4a6ce5559c67d3965
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external URIs and link farm heuristics, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and numerous URLs point towards a phishing lure, likely intended to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://catamma.ru/uplcv?utm_term=piano+scores+for+beginners+pdf PDF link annotation
    • http://billsky.ee/files/file/fazivozexijobog.pdfIn PDF document text
    • https://swalaya.in/userfiles/file/kebomo.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/joguzedejaxafu.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/nejib6j8v89gpkpqvmpbskfujb/kidelakoxinez.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/af0ed6840915b9b00b268e08e527657a/mizedilesifasemuwelegiba.pdfIn PDF document text
    • http://iltorg.ru/upload/file/wipafukovafex.pdfIn PDF document text
    • https://mszukam.pl/dat//file/36345197869.pdfIn PDF document text
    • https://ibliberia.com/ckfinder/userfiles/files/88013500809.pdfIn PDF document text
    • http://wabasnb.com/files/fckeditor/file/150266070960c429bce6793.pdfIn PDF document text
    • http://geose.ru/userfiles/file/91337990084.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160947d0fa50ea---vakimumavilavodefojo.pdfIn PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/a2a0890496391057404d23bfb249334f/dusisadegekoxefuraxererok.pdfIn PDF document text
    • https://coluer.ir/documents/file/56334265767.pdfIn PDF document text
    • https://heritagecambodiatravel.com/userfiles/file/25319059394.pdfIn PDF document text
    • http://techscreening.com/userfiles/files/laxetulojegufe.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/c48ec62f24368bb318d9a42a2cfd7960/44639892528.pdfIn PDF document text
    • http://mbcasc.net/imgs/file/ravevexegu.pdfIn PDF document text
    • http://sumterhigh89.com/clients/863574/File/fadibuzeximi.pdfIn PDF document text
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/5625ab2666df40c7178dd14dfa904aa9/dofijuxegejogixet.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a45eb044b6a---39365326975.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094bd5c12bc0---1084090935.pdfIn PDF document text
    • http://charivne.info/images/file/4622847321.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160799f3c2575e---2742938907.pdfIn PDF document text
    • 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_off000117cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117CC 10792 bytes
SHA-256: b5adeadb46cb562edbf58dc652ac9bbf478963c8fa0c6f6d965e65416a39edbc
font_01_sfnt_off00013056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13056 17788 bytes
SHA-256: 97fe9bb31f27be061e59921024e664bbcdaa135dff918946f8f6d72e97620403
font_02_sfnt_off00015efd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EFD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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