Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e04a4bc7ff369e9…

MALICIOUS

PDF

232.6 KB Created: 2021-08-04 08:52:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 3e5a3fd8898ac18093a192132b3c84aa SHA-1: b03cacea33b80919414f350b47f0e088580746bd SHA-256: 0e04a4bc7ff369e9705bb1af81f9f935c2d775f1ef6d363c6c613b1053432d3c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs, many pointing to compromised WordPress sites, suggesting an attempt to distribute malicious content or conduct phishing. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of numerous external links and the PDF's structure point towards a phishing or malware delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8557

Heuristics 5

  • 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.
  • 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://coretry.ru/uplcv?utm_term=big+ideas+math+algebra+1+chapter+3+test+answers PDF link annotation
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609cefda7e627---17133285879.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607312cf982b2---nibotasegelaxa.pdfIn PDF document text
    • http://piqiso.ru/userfiles/file/jitusajorasibiwogo.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/cs6v27lvausaqnfcohoh31bpo7/lidokumeme.pdfIn PDF document text
    • http://zonweringbelgie.be/ckfinder/userfiles/files/42182282240.pdfIn PDF document text
    • http://interwork.sk/userfiles/file/65479234910.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/16091a688ac3e5---megegikuxodajiweduzitasel.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/11052137843.pdfIn PDF document text
    • http://centralgiving.com/media/userfiles/file/rapepilogubotidekeluremoz.pdfIn PDF document text
    • https://vannordenvastgoed.nl/userfiles/file/49141428153.pdfIn PDF document text
    • http://jnafarms.com/clients/864068/File/67524410468.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/65582138949.pdfIn PDF document text
    • http://thaiboxes.com/piceditor/file/tibarosojojofoxaridi.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/f9efcc53bb3aa5514736d221cc5dcb4d/busofotapazativ.pdfIn PDF document text
    • http://obraz-tlt.ru/userfiles/file/664583627.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/f0db1db3c89a2d7c3659f2899ecf0520/23968911690.pdfIn PDF document text
    • http://fsoa.cn/userfiles/file/26014259864.pdfIn PDF document text
    • https://socohoteldanang.com/uploads/image/files/88811141077.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/3eec9b92f6f66c5805f5b3df0d81f85b/91081983678.pdfIn PDF document text
    • http://sugarfree-gelato.com/upload/file/suxujosaroza.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607654f7b7cc4---musonikaz.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/n5r5a7eck78s2a55mkisv5mno4/68639664928.pdfIn PDF document text
    • http://yogo110.com/userfiles/file/gowejevinezirax.pdfIn PDF document text
    • http://zonazero.es/userfiles/file/85987685817.pdfIn PDF document text
    • https://landbar.com/upload/files/lekiranenuvorajiga.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_off00032c64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32C64 19552 bytes
SHA-256: c7d0d287ae70e430f992b143f173d27b40a59f58a9dd40b4eca72d28890e48a4
font_01_sfnt_off0003604b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3604B 11344 bytes
SHA-256: 16220225baed22ad3de1caef85ccb3961de7de3cb0261b6b136798cb43cdfd2e
font_02_sfnt_off00037a83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x37A83 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1