Malicious PDF — malware analysis report

Static analysis result for SHA-256 e614956b65e7110d…

MALICIOUS

PDF

88.4 KB Created: 2021-09-08 17:11:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 3f9e56190bb93110cbdc7be1c16f5af8 SHA-1: b47af04f494d3ef8fef79fc88105f37e5e183dde SHA-256: e614956b65e7110df01692439cd98817c93f4c72bb2feac585352955fbce9b2c
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple URLs, including links to compromised CMS uploads and disposable hosting, indicating a phishing or malware distribution attempt. The 'SE_INVOICE_LURE' heuristic suggests a pretext for the malicious content. The embedded JavaScript likely facilitates the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://kimsanghun.com/upload/userfiles/file/2021971421186435.pdf In PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/161324eee13789---kokifojiditemakilirolug.pdfIn PDF document text
    • http://adwokaci-pila.pl/userfiles/file/wuretojigutikibivo.pdfIn PDF document text
    • https://bda.ch/ckfinder/userfiles/files/60046976737.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/16130ec08dca53---36027109927.pdfIn PDF document text
    • http://totoumi.jp/upload/file/49276539510.pdfIn PDF document text
    • http://deltools.com/userfiles/file/davefidivuz.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/p9ogqvht8kj1dmru4jfhtpea7p/zetibazumogaritet.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161323546a3f53---41186345245.pdfIn PDF document text
    • https://onwater.my/uploads/file/patepuwaganekolegelulelom.pdfIn PDF document text
    • http://goopenapp.com/uploads/files/34451340044.pdfIn PDF document text
    • http://baovekhucongnghiep.com/upload/files/worosivifiniguvobo.pdfIn PDF document text
    • http://klimagra.pl/images/wysiwyg_img/file/94296437493.pdfIn PDF document text
    • http://1night2day.com/ckupload/files/52459068174.pdfIn PDF document text
    • http://kbidc.kr/upload/editor/file/1630971052.pdfIn PDF document text
    • https://franchiseharbor.com/files/files/9230918732.pdfIn PDF document text
    • http://auto-spec.ca/fck/file/rilalezikigizolovadu.pdfIn PDF document text
    • http://lacasedescaraibes.fr/file/rilisetovijiko.pdfIn PDF document text
    • http://www.brickchamber.com/ckfinder/userfiles/files/41060879060.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/78008778581.pdfIn PDF document text
    • http://machi-tomo.xyz/js/ckfinder/userfiles/files/kinetimerapezoresubisow.pdfIn PDF document text
    • https://venusnvs.com/userfiles/file/60135530112.pdfIn PDF document text
    • http://rigosarchitects.gr/userfiles/file/lozegelimodo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=bailey+and+love+surgery+27th+edition+pdf+free+downloadPDF 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_off0000f170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF170 11364 bytes
SHA-256: 7060e7941f5b4255db4b3f857df848a4724dbcf1b9f8afb485bb0f7997fffff0
font_01_sfnt_off00010c22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C22 18156 bytes
SHA-256: cf5715324ebfff3f66214c887f5fc1469f6a5fbf0cb3e1727eba5cb1df48ad50
font_02_sfnt_off00013ade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ADE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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