Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7ff09fedf0eeef0…

MALICIOUS

PDF

77.2 KB Created: 2021-08-17 00:25:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 378aa4cfb30ab057009335867b2c64c2 SHA-1: 494d88fc232399373ca1a119a1a099c392d62474 SHA-256: d7ff09fedf0eeef06565120205b8f50f6c420febf1768653c2303b93b405740d
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple domains, likely intended to distribute a password-protected archive as indicated by the 'SE_PASSWORD_ARCHIVE_LURE' heuristic. The presence of embedded URLs and the nature of the heuristics suggest an attempt to trick users into downloading further malicious content, possibly via a phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://drafthe.ru/uplcv?utm_term=soluciones+tecno+12+18+vistas+de+piezas+1 PDF link annotation
    • http://www.retorika-zidar.si/ckfinder/ckeditor_uploaded_files/files/13252830477.pdfIn PDF document text
    • https://aljazeerahpetroleum.ae/userfiles/files/24879785487.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/slnul9k2eual3ci805e4td0m8b/44293015986.pdfIn PDF document text
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/d50b695b12a81c919c6e52894a9caca8/41388815217.pdfIn PDF document text
    • http://mrpokedb.com/uploads/files/vosumevizilemufunubikuz.pdfIn PDF document text
    • http://www.fuchingrading.com/upload/file/vamozodotezomunetibepiza.pdfIn PDF document text
    • http://7linc.com/uploadfiles/fckeditor/20210725/file/16271523349745.pdfIn PDF document text
    • http://targhevaticane.it/userfiles/files/9377168756.pdfIn PDF document text
    • http://svsteinfurth.de/radsportfiles/file/24533163239.pdfIn PDF document text
    • https://cafesca.mx/ckfinder/userfiles/files/ligevopowotulixifudonir.pdfIn PDF document text
    • https://maryamghiasi.com/images/upload/files/4510436571.pdfIn PDF document text
    • http://syuncyoku.jp/upload/file/57255181400.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/jiwap.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2b951bf13---tixaxoto.pdfIn PDF document text
    • http://namadagaskare.ru/ckfinder/userfiles/files/gunepuvapasinibituzekis.pdfIn PDF document text
    • http://congtyvima.com/images/Download/vesogaruxaja.pdfIn PDF document text
    • http://rowsontw.com/shopadmin/upload/files/58063899410.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/43715044641.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/67817699636.pdfIn PDF document text
    • http://architettorobertafasola.eu/userfiles/files/49272672296.pdfIn PDF document text
    • http://sunjewelsonline.com/userfiles/file/zifot.pdfIn PDF document text
    • http://helder-effect.nl/userfiles/file/kafotojevurufaxevulo.pdfIn PDF document text
    • https://www.unimedbelem.com.br/painel_template/assets/global/plugins/ckfinder/userfilesfiles/busikirapuzu.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_off0000c6c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6C7 18100 bytes
SHA-256: 9d9b0c065e839b4358225af8f10bd3e1176f0d7fd4664e32ecf1945de704139e
font_01_sfnt_off0000f4c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ce0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE0 11088 bytes
SHA-256: 8f60376903be718da1e56800c1ca56cdddeb717509ce7cdaa24804e45d21edeb

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