Malicious PDF — malware analysis report

Static analysis result for SHA-256 f53ccaa652271e07…

MALICIOUS

PDF

69.5 KB Created: 2021-10-03 02:55:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 7d4746f192f72232f99b5597baba582d SHA-1: d48324bdadd42d47c856e1dd61aa133a9e15725a SHA-256: f53ccaa652271e07e7957fa4d5936fb3b5b916ea5e2a5cf07dd01c19461c060b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to compromised websites, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest a phishing or trojan payload delivery. No scripts were extracted, but the PDF structure itself facilitates the attack by hosting these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://garglob.ru/uplcv?utm_term=emma+kivell+and+shane+richie PDF link annotation
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16155a531ac662---sorex.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/5b47d42dde711a41a6f9b8e20833ee19/netovuwegomuponedun.pdfIn PDF document text
    • http://fishngrill.iorderfoods.com/uploads/files/xawisulajuvumok.pdfIn PDF document text
    • https://lmetinternationalschool.in/ckeditor/ckfinder/userfiles/files/siwazuloti.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/84706321644.pdfIn PDF document text
    • http://daisytalavera.com/userfiles/files/10944417423.pdfIn PDF document text
    • http://dc-a0dcf319a153.breakthroughsport.com/userfiles/files/87395313176.pdfIn PDF document text
    • http://yenidenyuzlendirme.com/ckfinder/userfiles/files/badiwid.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615214a0e5cd0---19800019196.pdfIn PDF document text
    • http://teusz.pl/UserFiles/file/18736651779.pdfIn PDF document text
    • http://klgd.spokoino.ru/i/upload/files/28249836722.pdfIn PDF document text
    • http://ttworld.hu/uploads/content_files/files/wegubogolasalitesapefuza.pdfIn PDF document text
    • http://guanzhuli.com/userfiles/file/risowiwezod.pdfIn PDF document text
    • http://robedecreateur.com/img/files/64096382716.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/16158d410e6036---32871504708.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/30047ea2ee2a9de8396e555da4e81ea9/20671210956.pdfIn PDF document text
    • http://abcbyspu.com/ckfinder/images_store/files/mesozipixugu.pdfIn PDF document text
    • http://askort.pl/Upload/file/27153910911.pdfIn PDF document text
    • http://baldonimarcostudio.eu/userfiles/files/medopivuwibidodaxekisi.pdfIn PDF document text
    • http://zamgph.com/FCKeditor/editor/filemanager/connectors/php/uploads/file/100024531532.pdfIn PDF document text
    • https://mygrind.ie/userfiles/file/99304397847.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16151efd193273---39608085930.pdfIn PDF document text
    • https://unaizahic.com/Files/files/56355225805.pdfIn PDF document text
    • http://pro-group.ru/userfiles/file/bowafosiserojujoke.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_off0000b0e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c8fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8FA 10560 bytes
SHA-256: f403707365b4f34280ba797fe5d9d3584fb2b9a9f21355f4ee0247083055d06a
font_02_sfnt_off0000e0c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C5 15640 bytes
SHA-256: 2c7ce414dc110d675011f85deea63a6e1d175de9046e7d63f2d89349dd1fbced

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