Malicious PDF — malware analysis report

Static analysis result for SHA-256 6180292e7a5318ee…

MALICIOUS

PDF

77.4 KB Created: 2021-09-01 00:02:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e7482e8ae96e3e8cbc92ce1bb7c592c6 SHA-1: 05ff541b1d4698f69dbaec5de144d251f2652c61 SHA-256: 6180292e7a5318ee0c982aa23672b35d3a0310a00b7aa306c9e1c1b3f8d72ba5
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS upload storage or appear to be part of a link farm. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classification strongly indicated maliciousness. The presence of multiple PDF link farm heuristics suggests an attempt to direct users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 http://asfalon.com/__files/file/riravoluwutafuwibumija.pdf In PDF document text
    • http://kimkhimientrung.com/uploads/image/files/69265518863.pdfIn PDF document text
    • https://zop.bg/webroot/img/content/files/83529493076.pdfIn PDF document text
    • http://ort168.com/upload//ckeditor/files/kepivufoduvujisejibijo.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/v6c2m7pmhv40tlggerllnpnqhi/67361147527.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf395a695a---xokubobawu.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/960be4ebfb7e8d8132c8428810ed9f48/sexafa.pdfIn PDF document text
    • https://samngaimarble.com/html_upload/file/62270850941.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/s9l3vkkgqg2qljmgh0e0jste62/zevamadiku.pdfIn PDF document text
    • http://musiconthebay.org/clients/2/26/269dd5bc96e197da989a8dccc71442af/File/nelafawowiwudipakabovixu.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/fajizikilodukola.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/2f14c4e80d7a62f1d04991a025c3fa08/xojoxujagezesanazetizuxe.pdfIn PDF document text
    • http://chanakyaaerospacedefence.com/userfiles/file/87090944963.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099f5800e3e8---zazaxukodawobitivinukineg.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608a4dc6a6860---80969404201.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e8507282cf---86961839627.pdfIn PDF document text
    • https://latrinquette.com/upload/editor/file/lizinukakuvolenoperozovok.pdfIn PDF document text
    • https://eldorado777.ro/upload/editor/file/tosopuviwonatodategesu.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/ea6f315d23cf701894b5a6f8b812d7cc/tavutuke.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/7554970041422cc54808130706890195/geraludada.pdfIn PDF document text
    • http://hyswimpool.com/userfiles/13385585750.pdfIn PDF document text
    • http://fsoa.cn/userfiles/file/20717470580.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=scorpio+lucky+numbers+todayPDF 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_off0000ca82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA82 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE294 16844 bytes
SHA-256: 8f529adac5ad1cb7a2f0ad2f0137b31c99c6dfe82ef70894a294606d5075d939
font_02_sfnt_off00010dcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DCD 11196 bytes
SHA-256: aac0f8672aecf95660c69dd4f4129fc183d8f710f180321453840661d84258d9

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