Malicious PDF — malware analysis report

Static analysis result for SHA-256 99c7e25efd1323bb…

MALICIOUS

PDF

87.7 KB Created: 2021-06-27 07:41:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 4647b5ab837f4287288dbd02d9a30d1b SHA-1: 846106cd9f9abba5703da6239bfb1e01c0f623c9 SHA-256: 99c7e25efd1323bbe17ed38fef6c69778b86dbf80cc1be3824b830694d495337
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded URLs, many of which point to compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were directly extracted, the structure suggests it's designed to lure users into clicking links that lead to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ac24d07543e---68084457885.pdf In PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/062f6e73c6464a0fe00c80bd36c49b3b/47483955172.pdfIn PDF document text
    • http://caratow.eu/userfiles/file/29975444320.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/11097282884.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/jesasokatokulov.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b3e6063f2a---dimum.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afbfaa128da---dizunerilisapowusetekitax.pdfIn PDF document text
    • http://apsara.ru/userfiles/file/15749657182.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/02865d5f7a1ef560918f8eeb41bc0469/76746945010.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607f270fd8b3d---gofudexujopotakorol.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/8b9435cb23275585febc5c27b3a616cb/9526063029.pdfIn PDF document text
    • http://kaithompson.com/userfiles/file/47282020789.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16087995bc238a---zalugatomaxanorusen.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0181688b8---rurujabixob.pdfIn PDF document text
    • https://biodent.ro/m4fm_files/m4news/ck-uploads-files/42522349908.pdfIn PDF document text
    • https://flyingfish-stay.com/userfiles/file/29924769761.pdfIn PDF document text
    • http://pincailight.com/zk/UploadFile/file/2021060405075773499.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/fc49ddb6fd9949c6c440b187b7550b66/wuvozabibitedebevipuv.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ae86088d36---11598030744.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/14680178329.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077e99e4da52---viluwapubin.pdfIn PDF document text
    • http://fitviewer.de/files/file/56380167229.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160989335864c6---suzumibapanopedak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=new+on+the+blockPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF338 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010b4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B4F 10100 bytes
SHA-256: cd41d53580ad061fa18d1ae79adcddc41842527cc68252515c1113e4120d82c7
font_02_sfnt_off000121ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121CE 17856 bytes
SHA-256: 2b26aa06a74def72294a28cef3dec7aed80490cf6d13c545a0ee4c773cc0e5c3

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