Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0109586a35a3d14…

MALICIOUS

PDF

84.8 KB Created: 2021-09-02 00:54:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 961bf56fd2aa281bc719003b69e7f262 SHA-1: e5f207271f120c7c31a7f3b4329c9ed334227cc3 SHA-256: f0109586a35a3d1475a901b9db3f3fb0f5a327145e3bed8ee69cb014c8903ac5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external URIs, many of which point to compromised websites or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm on disposable hosting, suggesting an attempt to distribute malicious content or phish users. The embedded JavaScript likely facilitates the redirection to these malicious sites, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 7

  • 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.
  • 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.
  • 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://drafthe.ru/uplcv?utm_term=homes+for+sale+in+lawson+waxhaw+nc PDF link annotation
    • http://studiostocchi.eu/userfiles/files/rivemunogepoxinavubeso.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c415fe8e240---laviparudojuvadikifojeri.pdfIn PDF document text
    • http://shrootgroup.com/upload_fck/file/2021-7-25/20210725204408609042.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/45ae5341011ec0533cf4cd850c27af7a/bifekunabujisalapupamo.pdfIn PDF document text
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/f95225390a46d09c6747d4ba08c1e348/78558603535.pdfIn PDF document text
    • http://radis-rrl.ru/userfiles/image/wuminefisanibokovinazigob.pdfIn PDF document text
    • http://www.teaterskolen-efteruddannelsen.dk/ckfinder/userfiles/files/65928457727.pdfIn PDF document text
    • https://k-barrierfree.com/FileData/ckfinder/files/20210717_55C24CCCAE33B793.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/73650216877.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1610eb722058e5---putemipisobikuninuvuruzej.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/kewolilezubipot.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/8f55f9d8c3d8af2f3c8c256e38185c59/xoporusu.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f23a54bed1c---75845923216.pdfIn PDF document text
    • https://tomorrowhubs.com/upload/users/files/tulisitizerabugekixalipep.pdfIn PDF document text
    • http://archi-m.ru/userfiles/file/mowuzuda.pdfIn PDF document text
    • http://hanilkwanla.com/uploads/files/mujutixajigolasiduvezavil.pdfIn PDF document text
    • http://www.aaar.cat/assets/js/ckfinder/userfiles/files/bawegobi.pdfIn PDF document text
    • https://chezgregoire.fr/userfiles/kazenakedepi.pdfIn PDF document text
    • https://jerseyshorepirates.com/userfiles/files/81974572033.pdfIn PDF document text
    • http://jatyn.cn/upfiles/202105/file/1622016466.pdfIn PDF document text
    • http://urbancollab.com/userfiles/Proj_Name//files/16099945455.pdfIn PDF document text
    • http://futurepoolandspa.com/ckfinder/userfiles/files/5838800243.pdfIn PDF document text
    • https://ayurvedaemart.com/uploads/file/buzusubobowonaso.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612cb41acc0d0---46142040933.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607146c4df8dd---41422097690.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_off0000e409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE409 10680 bytes
SHA-256: 92a649f7f7f1cfcce71288a7b75f41e022e02ea9da167933ecbaecad0ab46b24
font_01_sfnt_off0000fc50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC50 18420 bytes
SHA-256: 0ad45a8ed8e9bc5e2f2eeeb54f668bfc8f57a7ce3d88d5d377fa11868499c6b7
font_02_sfnt_off00012c41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C41 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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