Malicious PDF — malware analysis report

Static analysis result for SHA-256 48168c893f5e90b9…

MALICIOUS

PDF

191.7 KB Created: 2021-09-07 21:20:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 59d5c4e877c0245fc1f1b4b432f8c412 SHA-1: 18917fe70befe4cc8d651ec8d603e5d83a8417ac SHA-256: 48168c893f5e90b9868dd5e710b49405f9468496c6555c7277fe47d6dcd87bc9
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external sites, many of which host further PDF files, suggesting a link farm or redirection mechanism. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common technique to bypass initial security checks and deliver a secondary payload.

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://wastran.ru/uplcv?utm_term=axis+camera+station+manual+pdf PDF link annotation
    • http://merwepizza.com/upload/file/51345146442.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fced1fdb87f---pesuwavesawebuxaxalak.pdfIn PDF document text
    • http://kag.fr/userfiles/file/pevigavukalavajemabadapo.pdfIn PDF document text
    • http://tofuyatogo.com/uploads/files/55664416265.pdfIn PDF document text
    • http://precedent.by/_newsite/images_from_html_editor/file/kujofizugetesimalenobi.pdfIn PDF document text
    • http://geoplan.su/userfiles/file/wizowovodawifi.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/ritapedilupoliradu.pdfIn PDF document text
    • http://schokoladenfontaene.de/idata/76021778146.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160869c9601ec8---gemutadekojaxefipamo.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/56979101881.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/1e90efd6a5dd50af9e006a6b7cbd6163/502502772.pdfIn PDF document text
    • http://dezmaster.com/userfiles/file/60815374614.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/061a1cfd3e3e2fe51ee3f8f50e8f6932/gurajosovudexefezovikux.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/11411802966.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/60ce037c6acf47cdab1ac29727d2be5c/feberemi.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/nizejumiriwige.pdfIn PDF document text
    • https://majubesar.info/contents//files/rifux.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/c921b1656afe81b52bfa4a9a06e47511/zezomeriwajomexipebaz.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fd0116ac669---foparamaxa.pdfIn PDF document text
    • http://osoboebludo.com/ckfinder/userfiles/files/50430325362.pdfIn PDF document text
    • https://baoholaodong24.com/userfiles/file/viwetidixevedigup.pdfIn PDF document text
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/73a57e2145750fcd8098692e9192b5e7/sakifenoza.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_off00028868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28868 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0002a07a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A07A 20624 bytes
SHA-256: 21722b9495732419ca08243a4cdcabf9ae60b043bc08d3449c49723b722ad967
font_02_sfnt_off0002d741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D741 10964 bytes
SHA-256: d64d2165d8a741a8311ef932bd278a180c81372f316294f0b5e0aaf91266d469

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