Malicious PDF — malware analysis report

Static analysis result for SHA-256 f92e2e33dd350c94…

MALICIOUS

PDF

74.0 KB Created: 2021-10-06 06:56:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: df914e353fa0f1ea168925644bf888dc SHA-1: 082e197d69cbfd2141c84bf97308d24611a74515 SHA-256: f92e2e33dd350c945769190ce1032246a2b17bc18e4a33467f14367de987ae6f
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript and multiple external URIs, flagged by ML and ClamAV as malicious. The heuristics indicate it's a link farm on disposable hosting, with one URI specifically mentioning a software download lure. The embedded JavaScript likely facilitates the redirection to these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • 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://smidgel.ru/uplcv?utm_term=sly+cooper+4+pc+download PDF link annotation
    • http://chunmianxian.com/upfolder/e/files/20211006022034.pdfIn PDF document text
    • http://associazionemillesogni.it/userfiles/files/rizadoxom.pdfIn PDF document text
    • http://himalayakebab.com/shipinc/userfiles/files/tukifanozopokajo.pdfIn PDF document text
    • https://citronel.com/userfiles/files/pujejirerar.pdfIn PDF document text
    • http://sgo-bage.com/public/files/files/84381366880.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/sorupajo.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/wijufosadak.pdfIn PDF document text
    • http://clubesquilacoma.com/uploads/files/62507530351.pdfIn PDF document text
    • http://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.com/ckfinder/userfiles/files/zenarurejanejawamofakif.pdfIn PDF document text
    • http://veiligheidsslot.nl/ckfinder/userfiles/files/57138453587.pdfIn PDF document text
    • http://mayinmaunhat.com/upload/files/jujinukurifapolenasatu.pdfIn PDF document text
    • http://webinaris.blog/ckfinder/userfiles/publics/files/womodikinu.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161584d1306123---nudax.pdfIn PDF document text
    • http://0vote.com/ckfinder/files/zeroruvutav.pdfIn PDF document text
    • http://mtecommerce.it/public/news/file/50180650036.pdfIn PDF document text
    • https://gadesign52.com/uploads/files/202109071758449833.pdfIn PDF document text
    • http://ttccid.com/userfiles/files/xabinorogivub.pdfIn PDF document text
    • http://liavanhaeringen.nl/userfiles/files/33291127353.pdfIn PDF document text
    • http://vinhthuanvietnam.com/upload/files/46755476666.pdfIn PDF document text
    • http://www.web-globus.de/ckfinder/userfiles/files/53589576939.pdfIn PDF document text
    • http://teen.plovdivweek.com/js/ckfinder/userfiles/files/69224740490.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_off0000bcbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCBD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d4cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4CF 17252 bytes
SHA-256: 3a59336215fc9f2654528de492a48cf3e07dd946ec68e31525314b8afe8c2000
font_02_sfnt_off00010114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10114 10500 bytes
SHA-256: a1cf380be2b3c7a39ead14305ba367c79265153c151e3742ebfbd384ba977970

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