Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4bed295172f0f80…

MALICIOUS

PDF

82.6 KB Created: 2021-10-11 21:19:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03
MD5: 073bad2af8302eae1d7e9a84556311fb SHA-1: 6e7ed0b7f27dd2e762c65637c7317b3214c83184 SHA-256: c4bed295172f0f801bf1a6198162c6f0dd398df65859c803e8c61cef0d125a32
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and multiple external URIs, including links to compromised WordPress uploads and link farms on disposable hosting. The primary attack pattern involves exploiting PDF vulnerabilities to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://oniceh.ru/uplcv?utm_term=the+danger+of+a+single+story+annotated PDF link annotation
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161506bf8504a7---95743810663.pdfIn PDF document text
    • http://maha.tcnme.com/chop/multimedia/userfiles/file/zawovekag.pdfIn PDF document text
    • http://hrudolf.com/userfiles/fevuniwujodo.pdfIn PDF document text
    • http://iiiemjobs.com/FCK_Editor_Images/files/fajotukegupopefeko.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/12190ac88c8b20c265d75cec0ea83ac2/lazeparuwalexax.pdfIn PDF document text
    • http://huarong-bio.com/upload/files/8354433821.pdfIn PDF document text
    • https://searchkar.com/ci/userfiles/files/ganoxuzafuzixuxonenepe.pdfIn PDF document text
    • http://www.galiantsolutions.com/emailimages/file/84752338178.pdfIn PDF document text
    • http://skyrun-arser.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/210929113835777868rkk9gv.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cc4058277c.pdfIn PDF document text
    • http://viermaalh.nl/Bottesteyn/Site/afbeeldingen/file/bexol.pdfIn PDF document text
    • https://jackinthegymtpe.com/uploads/files/202109240631391144.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/7384197036.pdfIn PDF document text
    • http://whipitleather.com/userfiles/file/losijarivuxaduxodeki.pdfIn PDF document text
    • https://jobtiara.com/files/files/49625874072.pdfIn PDF document text
    • https://synodradomski.pl/userfiles/file/jexubiwojikomipavi.pdfIn PDF document text
    • http://costruzionibulagna.it/userfiles/files/89617993332.pdfIn PDF document text
    • https://www.dooleysnaturalgas.com/ckfinder/userfiles/files/runumefusulasitiduz.pdfIn PDF document text
    • https://cungcapthitdetuoi.com/app/webroot/files/images/pages/files/54753772312.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/4c3354385133d56953f462a12ab34a4b/90636570014.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16143e922e3135---99115801546.pdfIn PDF document text
    • https://produccion.formacion2puntocero.com/ckfinder/userfiles/files/46439872.pdfIn PDF document text
    • https://taperagi.com/contents/files/39961807745.pdfIn PDF document text
    • https://hediyelikhanem.com/calisma2/files/uploads/64073888210.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141879becb99---73336047158.pdfIn PDF document text
    • https://tes-sys.com/uploads/ckfinder/files/20210917/16318846653425.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_off0000d955.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD955 19364 bytes
SHA-256: 8792a07ab9c2f96f7dbe9e3e329a551aa8f55e0a1ec875ec029eeda5d12c2e74
font_01_sfnt_off00010c1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C1C 10708 bytes
SHA-256: adf628dac85fac367fddaeada6c2f895c0ca14dcc8f0cdc6db58ad7e77f4dc5d
font_02_sfnt_off0001246f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1246F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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