Malicious PDF — malware analysis report

Static analysis result for SHA-256 42193843c41c5e40…

MALICIOUS

PDF

91.1 KB Created: 2021-09-18 05:15:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a6fe921bee20cbda6540dc6e60b2f042 SHA-1: d7f02ebd24aa483b388c8ff716374b1025d1640b SHA-256: 42193843c41c5e40917e9d5bed5444d8e7a33a9c5454c82085331ff0f0c5c048
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress uploads and other disposable hosting, suggesting a phishing or malware distribution attempt. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document may instruct users to open a password-protected archive, a common tactic to bypass security scanners.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://chcial.ru/uplcv?utm_term=crack+instagram+account+password PDF link annotation
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1612ea4d6f0623---giluf.pdfIn PDF document text
    • http://stadion-zarya.ru/ckfinder/userfiles/files/72203311187.pdfIn PDF document text
    • http://szyoujin.com/UploadFile/file/20210909220441087.pdfIn PDF document text
    • https://bedandbreakfastchia.it/userfiles/file/pufukeleduvisek.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/886def9457d485b48caf9693d37a1e0a/fiwojareribaf.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/e33dbd5e2e6ce13f053ddae96f50cdde/nawodetixemolatune.pdfIn PDF document text
    • http://evopizza.lt/ckfinder/userfiles/files/91660650626.pdfIn PDF document text
    • https://aspirans.com/files/file/xevegokazivok.pdfIn PDF document text
    • http://carrasvilla.es/uploads/files/vemirel.pdfIn PDF document text
    • http://artc-polymers.com/upload/images/files/gitaximomu.pdfIn PDF document text
    • http://chipublichouse.com/ckfinder/userfiles/files/bewipifutivavibaduvado.pdfIn PDF document text
    • http://eqletstalk.com/uploads/files/202109091009029966.pdfIn PDF document text
    • http://kcemsp.org/upload/editor/file/zeruketikonumubidifatupo.pdfIn PDF document text
    • http://neonatal-surgery.ru/userfiles/files/22412308097.pdfIn PDF document text
    • http://bukhatirhomes.com/userfiles/file/kereduvegizenexilujupiwe.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133b400f00dc---fijenipapof.pdfIn PDF document text
    • http://china-baby-clothes.com/d/files/pasukapukizuromipijuwebu.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cdab370b5c---91652462995.pdfIn PDF document text
    • http://sccsfz.org/upload/2021-09/tebakirakesuxisonu.pdfIn PDF document text
    • https://ecableapp.com/FCKeditor/FCKimgUpload/file/loduridap.pdfIn PDF document text
    • http://westfallassociates.com/documents/file/tojuvutuvil.pdfIn PDF document text
    • http://sanarina.de/ckfinder/userfiles/files/43249672335.pdfIn PDF document text
    • https://searchlink.org/userfiles/file/ziwejekoperutu.pdfIn PDF document text
    • http://business-plan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/repojepotelumesadag.pdfIn PDF document text
    • https://Null-byte.wonderhowto.com/Forum/Hacking-Facebook-Twitter-Instagram-Account-PassIn 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_off0000fa14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA14 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11226 19408 bytes
SHA-256: 5cc1f51e4a38856d297ff9d334989ae07caac6463aca02522ff9d7367c083178
font_02_sfnt_off00014522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14522 10988 bytes
SHA-256: 2662b9c2c8694c4fc13a88a7c5a9ecac8336812c07a20cf6d81ccb89b8c45b26

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