Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6e52be777bb49ea…

MALICIOUS

PDF

75.5 KB Created: 2021-09-21 05:31:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 364d14b0325a6a9bd2195954d93c09f4 SHA-1: 892d847fbe62afeaeb78b7b94f36f802fac91417 SHA-256: c6e52be777bb49ea622a3228c6d5cb35c1aac8afe78c78f6496d2e315bd46e95
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file containing embedded JavaScript, which is a common technique for executing malicious code. The presence of numerous external links, many pointing to PDF files on various domains, indicates a link farm or redirection mechanism. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification. The embedded JavaScript likely attempts to exploit vulnerabilities or redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://fivetc.vn/uploads/files/8963621477.pdf In PDF document text
    • http://esipro.lu/userfiles/file/jaxozaxez.pdfIn PDF document text
    • https://www.artikel238.nl/emmwebbit/resources/ckfinder/userfiles/files/49708942826.pdfIn PDF document text
    • http://montazenabytkupraha.cz/files/file/54828105857.pdfIn PDF document text
    • http://stefanourso.com/public/userfiles/file/86745040671.pdfIn PDF document text
    • http://rdmsrl.it/userfiles/files/31088369257.pdfIn PDF document text
    • http://byecook.com/ckupload/files/74263447381.pdfIn PDF document text
    • http://platypusspot.org/uploads/ckfinder/userfiles/files/fabawumajisaginajekigu.pdfIn PDF document text
    • http://premiumcsp.com/uploads/files/gepapevunotevanasixi.pdfIn PDF document text
    • http://sodrex.pl/userfiles/file/kelonebar.pdfIn PDF document text
    • https://quimicasorocolor.com.ve/ckfinder/userfiles/files/tozufuretalonazogimobifut.pdfIn PDF document text
    • https://chokysitohang.com/Uploads/userfiles/files/23150937787.pdfIn PDF document text
    • http://autosvilar.com/uploads/ckfinder/files/xonosifabogomurazuwasako.pdfIn PDF document text
    • http://goodtraefarm.com/ckupload/files/vekazoparoponuj.pdfIn PDF document text
    • http://industrialdevices.in/uploads/59790519157.pdfIn PDF document text
    • http://moestuinwebshop.nl/userfiles/file/gefejel.pdfIn PDF document text
    • http://nagakuratrading.com/js/upload/files/16062608895.pdfIn PDF document text
    • http://www.medic-pneumolog.ro/fisiere/file/65333605398.pdfIn PDF document text
    • http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/sugifezulejipeveterubetut.pdfIn PDF document text
    • http://xn--eyt274i.com/upload/files/97737209494.pdfIn PDF document text
    • http://perfect-gallery.com/userfiles/file/67702853811.pdfIn PDF document text
    • http://szyqjsj.com/UploadFile/file/20210904021918969.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=gomovies+inside+outPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC228 18340 bytes
SHA-256: 111792cbcf6bb3d2cbc1414e04d141abeb429cd5d064c3e9272a51130262a81c
font_01_sfnt_off0000f150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF150 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10967 10304 bytes
SHA-256: 247354be870bd79b4714d70f14c3c8a7c899871f32ee92e03b4068c38a5c015d

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