Malicious PDF — malware analysis report

Static analysis result for SHA-256 184d0032b606406e…

MALICIOUS

PDF

122.3 KB Created: 2021-07-31 11:49:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 399c07a91e3597881e1090b9ecd928e3 SHA-1: b65cbd06d2262ecad3726a9e47f4f695f9221d94 SHA-256: 184d0032b606406e4e319f0a1a899158e49a95e12099dd3cd2c131cf0ed8a30c
116 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous embedded URLs pointing to compromised WordPress sites, suggesting it's part of a link farm designed to redirect users to malicious destinations. The ML classifier strongly indicated maliciousness, and the heuristics identify it as a link farm on disposable hosting, likely for phishing or malware distribution. No scripts were extracted, but the primary attack pattern involves directing users to external, compromised resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://laborke.ru/uplcv?utm_term=tcl+65+inch+tv+manual PDF link annotation
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/303acd4e6fba88396ec0a0d80be84ca1/laxuman.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6279d861e---suramutupezekobolewuv.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/0f2509b81b3dce8307267b5a62681483/jepevitiwidabusefepuni.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af2e0a97d9c---zolorazozafuni.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084efbb508a0---74322104643.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/n89eegmf7hfkkf293rl6j88pt5/61936256439.pdfIn PDF document text
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/4282u5md28l6c9t3b6jprgsd9e/libuwelebunanenodobuw.pdfIn PDF document text
    • http://murphysbeads.com/clients/54316/File/goroduxatizawi.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/nosazipedasereluxota.pdfIn PDF document text
    • https://gmt-tw.com/app/webroot/userfiles/files/saditaxinokino.pdfIn PDF document text
    • http://megalabsrl.it/userfiles/files/6961638786.pdfIn PDF document text
    • http://solarhomepage.ch/fckeditor/editor/images/file/memabololigepukur.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/ih9nitoudgd5puir73fv1lpasv/fubuf.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085a14b3ad38---96920735320.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160da4aa3e5f10---43921074928.pdfIn PDF document text
    • http://mbcasc.net/imgs/file/vudidexisugudenudez.pdfIn PDF document text
    • http://tunesistudio.eu/userfiles/files/weweratofujegasojaraf.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/l7p8gsiuntohj541fedr8dpimi/86946663946.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/00b35cdd23496b23cd50e67d0bae7d32/nexorefenarokanud.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/69561193341.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/keviwokajed.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160736720358dc---64180460996.pdfPDF link annotation
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce6026df7f9---33495151823.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608451514d322---pitudopasolep.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_off00017c19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C19 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00019430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19430 10404 bytes
SHA-256: b5daf37b3d439658b76ad2e0f436714d99ec8d2190cff4716f69fdc0f42a5acc
font_02_sfnt_off0001ab96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AB96 17868 bytes
SHA-256: d2b3470dd12e9eee3cf402dd5ffcaa040116c547a6ef7f27e32cf814d8e29e2b

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