Malicious PDF — malware analysis report

Static analysis result for SHA-256 36587da6bce006c5…

MALICIOUS

PDF

85.2 KB Created: 2021-09-15 00:29:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 04b94a2362b1265d613e83df7c8f9d74 SHA-1: fb56e4851bef6b6190bc319994ef6b35c267e9a2 SHA-256: 36587da6bce006c5a293d12508b7edda6f7a1fffe2cb41ea15507845a7318b37
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains embedded JavaScript and a large number of external URIs, many of which point to compromised CMS uploads or disposable hosting, suggesting it functions as a link farm to distribute further malicious content. The embedded JavaScript likely facilitates the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://huntic.ru/uplcv?utm_term=arcore+react+native PDF link annotation
    • https://rimsball.com/ckfinder/userfiles/files/40789664564.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/161410d6b539ca---83832637828.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210907040830067.pdfIn PDF document text
    • https://burgas-remonti.com/userfiles/file/pazatuxadulageda.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141127bd33b0---xexotur.pdfIn PDF document text
    • https://www.sensormaticltd.com/app/templates/js/ckfinder/userfiles/files/83118425366.pdfIn PDF document text
    • https://pre-www.bridge-college.com/uploaded/ckeditor/files/49753288283.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140bb7a74be7---69038777983.pdfIn PDF document text
    • https://akamercedes.com/images/uploads/files/kawemakibizipapamugokap.pdfIn PDF document text
    • http://shiny-baby.com/fileimage/file/voruzujexedevasadejuxi.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/oongmliadhiamiv9rjdfvnqooj/sabafonudosafog.pdfIn PDF document text
    • http://www.morrisjones.co.uk/EditorImages/file/71700457623.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613a0b4d89870---30478283818.pdfIn PDF document text
    • https://nakipoglugroup.com/upload/ckfinder/files/55920087852.pdfIn PDF document text
    • http://thaoduocvn.com/userfiles/image/file/lezulolojukimol.pdfIn PDF document text
    • http://speckrepeg.by/UserFiles/files/nemevojumiw.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613d24c6cafe6---7622030667.pdfIn PDF document text
    • https://kozhikodedeaf.org/admin/my_files/file/60333577545.pdfIn PDF document text
    • https://allmassage.net/upload/file/20210903164216.pdfIn PDF document text
    • http://c2ctrading.org/cms_upload/files/42863361354.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161341c08cd7d0---9490920832.pdfIn PDF document text
    • http://monteconsultants.com/image/upload/File/23908583339.pdfIn PDF document text
    • http://basketaci.cz/UserFiles/File/newogixusigofosibejuwek.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_off0000e914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE914 18196 bytes
SHA-256: da37ee13b9bd3529716ca2a81eb5f6011b85db14d86f70a44720c5363d54bf69
font_01_sfnt_off000118fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118FB 10056 bytes
SHA-256: e23f76d4da570beefddde52dfffdea1ac5a4e210f90d7bf11441777fdf6776df
font_02_sfnt_off00012f83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F83 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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