Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f0ea99add128817…

MALICIOUS

PDF

113.4 KB Created: 2021-07-24 19:00:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 351c5615facd75d35bd9b745078d0c76 SHA-1: 579c7fc8b3563c3e5059d77628b6301d458d3a11 SHA-256: 7f0ea99add12881773e2e60d81dde65816f242445ba22513166f95813e7be740
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. Additionally, numerous external links are present, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to distribute malware or phish users. The ClamAV detection and ML classifier further support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/16075b69b98ff9---tawekuwuzatakametem.pdf In PDF document text
    • http://montaze.org/democms/userfiles/file/lovemivekav.pdfIn PDF document text
    • https://agroadvanced.com/app/webroot/newsletters/editor/files/latonadojewilewozibib.pdfIn PDF document text
    • http://playbabydoll.com/userfiles/file/19821512134.pdfIn PDF document text
    • https://meesens.be/KrMee/Tekstverwerker/rosarapotidemoninedudoge.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160804320e24aa---loramonitixadonogir.pdfIn PDF document text
    • https://accounting789.com/ThImg/file/48353028748.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608350e3a4195---84787174508.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094bfa63811c---juxibazepifezokodubopiw.pdfIn PDF document text
    • https://spheresignal.com/app/webroot/userfiles/files/kamapa.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098afe95c46d---kokogegaxizezulodi.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/84k4r345f6mj9h8pcj2bak1lp4/nizizepokofolanafi.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/6784601938.pdfIn PDF document text
    • https://bmw-zona.ru/uploads/file/dixevoriwokufijuravate.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/1ofuig2ft6qud4oorcr7429n9q/56715369457.pdfIn PDF document text
    • http://tomei4x4.jp/js/upload/files/devubi.pdfIn PDF document text
    • http://nusratali.com/userfiles/files/vutodijoxiliri.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fd67beaca3---mumado.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/1014765d5e455bdfe38fc0003c0b7ce5/81286037241.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/160b5e71ab6688---63000599866.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1be218383---ravefoxulasulujemipala.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/16092082c1c162---lorifuvefanatoxax.pdfIn PDF document text
    • http://domainecomps.com/documents/files/fexovomebonig.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bf3be2935c3---54905180951.pdfIn PDF document text
    • http://driscollandgibson.com/images/edit_images/file/bixanajelifez.pdfIn PDF document text
    • https://askisan.com/upload/ckfinder/files/noboxasuwu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=minecraft+apk+fullprogramlarindirPDF 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_off00015631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15631 10980 bytes
SHA-256: f66e533da7d8466aaa4a21d169fd6b03cff2c1067ea031e9357b19c3e9426476
font_01_sfnt_off00016f6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F6D 18552 bytes
SHA-256: 23b0f6dc209c83451a68589a3871a951acebc63d26d2914be2bc313b96fa42ef
font_02_sfnt_off00019d66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19D66 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1