Malicious PDF — malware analysis report

Static analysis result for SHA-256 77465a6e288bd62d…

MALICIOUS

PDF

210.3 KB Created: 2021-07-03 17:48:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 7d0dcaf896f2f2dc7e11688a62c98f45 SHA-1: 3171080624a7f0715d31ed2aaa7a14eaa1a055b8 SHA-256: 77465a6e288bd62dc586b9a1c5a160ec2b5b986439ef7d31c7de17bc45ea47c3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm or redirection mechanism. The presence of embedded URLs and the nature of the heuristics indicate an attempt to direct the user to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9798

Heuristics 5

  • 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.
  • 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://brooklynsmokeshops.com/admin/images/file/disomijaxamowup.pdf In PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076037ea979d---11016847873.pdfIn PDF document text
    • http://www.look4job.gr/images/_user_na/file/2777496056.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/qlspri34ven5edfon9s8plvj28/73434461125.pdfIn PDF document text
    • https://celebicatering.com/upload/ckfinder/files/vosotawinufikanagoka.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16073518d777af---97275312819.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/a1c60af04514fee9e9e70ba7c7e30274/lilokalujamipibimenuxi.pdfIn PDF document text
    • http://instandee.com/Images_upload/files/78544337650.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/ed0483b9ec526402b3b60818e452e095/sutaludawinakitava.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/16095ffaaae4fd---66375414799.pdfIn PDF document text
    • https://kisikana.hr/userfiles/file/rigunosivuzuximebufogakid.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ef6d43f7e---8894563301.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/deb0b959ae1d492d7e11069ecadb0c77/14370341618.pdfIn PDF document text
    • https://parokisantolukas.org/Uploads/userfiles/files/dowisukapiludejikep.pdfIn PDF document text
    • http://ccsl.asia/files/bifajevezuzoxitaturezo.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b2aa3d76011---28977682309.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a49fc95aa40---zifinomerez.pdfIn PDF document text
    • http://rajhansnursery.com/userfiles/file/83489654211.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/08c45b40b33d4cb256e30a09d411f62e/73831808776.pdfIn PDF document text
    • https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/cd79875399379fbeee9da5d131d80e07/luvurerevinixes.pdfIn PDF document text
    • https://sikanderajam.com/Robinson/ckfinder/userfiles/files/togusaviwazejuwerag.pdfIn PDF document text
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/2d06524bbf7e9c0818703285661732d3/38047937677.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/e5a8a7f42038571067b304c2a5dcfbe4/80881813995.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1608c2b45b4149---41668557926.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa23c7c2a08---2524349824.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd7de9e631---kavipepuxerafatug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=active+and+passive+grippersPDF 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_off0002d704.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D704 20740 bytes
SHA-256: b52ec96317d8dde0afabe2ea87f4fcb7e845d9e18612ac1ab8f43b950f89722e
font_01_sfnt_off00030b03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30B03 10568 bytes
SHA-256: e190567e91a5b443e2e8b6fd0bfd532c0239ca3fe62040f43f7ddbb7544fb770
font_02_sfnt_off0003231d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3231D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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