Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ec32b0ee447ce18…

MALICIOUS

PDF

84.2 KB Created: 2021-09-05 00:53:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 21174b023442e8aa34aa4dff5bb8fee2 SHA-1: be8d4a4fe43156573897cde244a4e2a3d30a3274 SHA-256: 4ec32b0ee447ce189af28dfcbfc6e778b7dffdb2cc9884f44bac2cf16e52f17d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external URIs, many of which point to potentially compromised WordPress sites or link farms. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a deliberate attempt to create a network of links, likely for SEO manipulation or to distribute malicious content. The embedded JavaScript, though not fully detailed, is a common vector for exploiting PDF vulnerabilities or redirecting users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://archism.ru/uplcv?utm_term=canzoniere+italiano+per+chitarra+pdf PDF link annotation
    • http://kaizenlife.com/ckfinder/userfiles/files/pazepawexowojevesomat.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607f541f1ac28---vofulufizuzaveduga.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/c87cd2454c56b2d6fe1a6929bd122f67/vamaveratulajaros.pdfIn PDF document text
    • http://farmina.ru/uploads/files/27113424088.pdfIn PDF document text
    • http://arcstema.com/userfiles/files/vafananekebiwuza.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/369fcb4c9d578e1db3e8e117979b93af/47001112306.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/be79e1822ebf603a4fa2fca85c518751/14757182085.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/7mbu8202uq3oqh80503f4m7fqt/ziliduzevuziraxatimifob.pdfIn PDF document text
    • http://luchetti.it/userfiles/files/36905661635.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16083a07d2b5f6---51177907117.pdfIn PDF document text
    • https://asiarsolutions.com/userfiles/file/14381716981.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/f5216b4e39162d85c52efe9d5e6739ad/xurufinumon.pdfIn PDF document text
    • https://master-service.ro/images/file/dapopofomelikaxojeniv.pdfIn PDF document text
    • http://designpavelzapletal.cz/files/file/31000267415.pdfIn PDF document text
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/af5da363f5899c6cb9a381aa3cbad194/deforiwixe.pdfIn PDF document text
    • http://www.netcorp.hu/data/editorfile/lisolepexonak.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/515f70a6dcff83d828545bf55247545f/83900554985.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cba34ee0fb---jesewiwupo.pdfIn PDF document text
    • http://parkety-patemal.sk/files/file/20279154427.pdfIn PDF document text
    • https://www.pu-sk.com/app/templates/js/ckfinder/userfiles/files/pinuzilifakapezalidag.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/gezazexabefazoguzelipal.pdfIn PDF document text
    • https://hkbca.org/UploadFiles/file/20210621141417200.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/tg0l3j0e95mhe7kjfoks86o3li/ratimolo.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/7cd850f87befce4eb7322729fce22b1e/30248679270.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/n4deiuotfk9vlltkceod79ii83/23277385136.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_off0000e303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE303 18160 bytes
SHA-256: cf29d1249343a6412ea2cb6cc15c20c79bfb1e2ac120b838474c46edce9f6e0d
font_01_sfnt_off00011243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11243 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012a5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A5A 10640 bytes
SHA-256: d2a284dec3e9267be27d4cf7d0b2e3e3c973a0278cbf4906b06b9ee8689eda30

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