Malicious PDF — malware analysis report

Static analysis result for SHA-256 be94428d4251a766…

MALICIOUS

PDF

86.7 KB Created: 2021-07-15 12:00:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: cc3274fb93c0fc571da1227974982b92 SHA-1: 10599a7227498eef4f1490442da92cc4dc301a59 SHA-256: be94428d4251a76690fe51efb5c30bc342d1cc19971ba937a52e8ccb29fdffdc
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised or disposable hosting domains, indicating a link farm designed to lure users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://art-lamps-rali.eu/files/file/zutot.pdf In PDF document text
    • http://pusancard.com/userData/board/file/pakololawesogido.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/dea964d090a5adb7329f18dc2a7d1c98/pipozefozodedadadewo.pdfIn PDF document text
    • http://kimhoatra.vn/upload/fckimagesfile/34017497816.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a4665dd1b1c---44812397618.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160848f548b0f8---25970902354.pdfIn PDF document text
    • http://fluellentrees.com/clients/58222/File/6583667705.pdfIn PDF document text
    • http://itkaufmann.com/images/fckimages/file/bofisivulefobunavavek.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a7609512722---detatokalir.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/5ca6665e1ba32e917ea6c2eba56e378e/63868595219.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609c7736a9e7e---pojadopikadevovesafes.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee63dfc5259---44350200014.pdfIn PDF document text
    • https://leavereview.com/customerinterview/ckfinder/userfiles/files/xavakogebutisoza.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/0oqpog5bq6dj1mvcvaejao0n31/noranuvanobozusedaz.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/6fve3asnl710qdkbkkhb57gvn5/66741623332.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16080fc7210653---tukosusowajitizefujasi.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/45284740294.pdfIn PDF document text
    • http://gyobel.itpublic/file/52159558461.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607e88d31a4cf---jexekudivitixusi.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160741fee73dd8---20423470268.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/466a0bee3e8e882d837bdd9f10453ffb/86574326160.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/o1ngkd8gsubmu1p7t2bvdkq7d2/52170280958.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075bdaa1dc9a---silikalosimugumu.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/lukanuredama.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/61352190958.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=evolution+of+ict+in+education+pdfPDF link annotation
    • 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_off0000f101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF101 17068 bytes
SHA-256: 0e54d4d5a1b8b0f9426195454468a9602037b5d417f0be333182702534197c95
font_01_sfnt_off00011d68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D68 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001357f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1357F 10496 bytes
SHA-256: b447f2f3219e3369715eeb1b66dda47298b9e30afd3e0ed290c211cf13f0f9af