Malicious PDF — malware analysis report

Static analysis result for SHA-256 00b213597a95d32e…

MALICIOUS

PDF

86.7 KB Created: 2021-09-12 19:04:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 57e17af2314468440e8ccbb99dfaf625 SHA-1: 121f15713c912296bb90aad71a6b5ce0ab997019 SHA-256: 00b213597a95d32ece27a311949457b3dfa631de4459a5b40f556482f62cee93
156 Risk Score

Malware Insights

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

The sample was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other potentially malicious sites. The presence of these links suggests an attempt to lure users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://crysiq.ru/uplcv?utm_term=best+benchmark+app+for+android+2020 PDF link annotation
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131c1c63b335---goxusuxemubifipapusupogo.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/lgcsgdtd18gmh43d9e18n17i6c/2825071097.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/3iv0fcfs59om10m4nm3lscq658/pixapamowujexitovo.pdfIn PDF document text
    • http://mspchicagolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zodamulitawexiguno.pdfIn PDF document text
    • http://whatifitspossible.com/ckfinder/userfiles/files/wezovedixezakajodofek.pdfIn PDF document text
    • https://www.wappa.com.au/siteadmin/ckfinder/userfiles/files/lagulivejonidod.pdfIn PDF document text
    • https://biomedchita.ru/imeg_master/file/60244729431.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a8a133cf5b---gitojudapatixotawazov.pdfIn PDF document text
    • http://stmarysharipad.com/userfiles/file/tujuvewid.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/16133da1118847---51936643780.pdfIn PDF document text
    • https://deycaterers.com/ckfinder/userfiles/files/piruwisulamijajid.pdfIn PDF document text
    • http://ychnjl.net/userfiles/files/10133623451.pdfIn PDF document text
    • http://vwtint.com/userData/board/file/waripamida.pdfIn PDF document text
    • https://infrastone.com/userfiles/files/95725744257.pdfIn PDF document text
    • https://mgc.to/sites/web/upload/files/81422634351.pdfIn PDF document text
    • https://ruta.hu/ckfinder/userfiles/files/pawabeluzumamob.pdfIn PDF document text
    • http://telekommarketing.com/firme_data/files/livevajiju.pdfIn PDF document text
    • http://malifer.hu/upload/file/27735764594.pdfIn PDF document text
    • https://lbjgold.in/ckfinder/userfiles/files/31282718796.pdfIn PDF document text
    • https://luiginoiobbi.com/userfiles/file/33020268465.pdfIn PDF document text
    • https://matharu.ae/userfiles/file/bofejefefezojejefifa.pdfIn PDF document text
    • http://hoaisonland.vn/upload/files/rinoposenusefojelezipepi.pdfIn PDF document text
    • http://daithanhnam.com/upload/files/52232370176.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_off0000ee05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE05 11364 bytes
SHA-256: 7c1bd3d696cf8ea5b2d7459357d289969a8991a1f910946fa073b48f594807f1
font_01_sfnt_off00010871.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10871 17180 bytes
SHA-256: 5594194f2aa3ee96d26e5f5b75859311909d89a57773d00437dca31e2772ff21
font_02_sfnt_off000134ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.