Malicious PDF — malware analysis report

Static analysis result for SHA-256 d117e9d2e45c552e…

MALICIOUS

PDF

86.1 KB Created: 2021-10-09 17:56:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 31a79bc5e86c21226765472515971233 SHA-1: 814ea25459e4bf14f0b2c6c4b5ffe3c6c60c54c8 SHA-256: d117e9d2e45c552e9986c23905103a522bf0c84dfd4e6f249ce29caae9392f94
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable domains, indicating a link farm designed to obscure malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a phishing or redirection attempt. The ML classifier and ClamAV detection further support its malicious nature, likely serving as a lure for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://huntland.hu/upload/file/437634359.pdf In PDF document text
    • https://hiperaktivite.info/userfiles/files/tebejoxegumobekuvosegaz.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/janopobedumomalijix.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/kebekujopibuxuxelukuzaba.pdfIn PDF document text
    • http://psychologkmalinowska.pl/ckfinder/userfiles/files/wozapuvemepumoluni.pdfIn PDF document text
    • https://kp-bs.ru/upload/files/belutibagegipazuvom.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/161353ad1a4693---57651138525.pdfIn PDF document text
    • http://pinturasoltra.com/images/slider/files/28994650954.pdfIn PDF document text
    • http://mtcongnghiepxanh.com/upload/fckimagesfile/27327490431.pdfIn PDF document text
    • http://w3-japan.com/js/upload/files/5019416127.pdfIn PDF document text
    • https://impactmediaresources.com/userfiles/file/24066133621.pdfIn PDF document text
    • http://sintniklaas.kinderopvangpimpeloentje.be/ckfinder/userfiles/files/38964822432.pdfIn PDF document text
    • http://thetsaban3watnuea.com/UserFiles/file/biwiwipafofawe.pdfIn PDF document text
    • https://nikosdimos.gr/userfiles/file/sajonuzegobamopagukamav.pdfIn PDF document text
    • http://salt17.com/userfiles/files/2677361999.pdfIn PDF document text
    • http://moristas.com/userfiles/files/11750230344.pdfIn PDF document text
    • https://easypayindia.in/userfiles/file/65842684537.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613dc9a05c657---zevikog.pdfIn PDF document text
    • http://www.libroparlatolions.it/backoffice/ckfinder/userfiles/files/kawexokokoxubimuvivefil.pdfIn PDF document text
    • https://gulfcans.com/home/madarmun/public_html/gulfcans/images/bulk_images/files/kuwaziwejagene.pdfIn PDF document text
    • http://perfect-gallery.com/userfiles/file/29805905465.pdfIn PDF document text
    • http://ranahytta.com/ckfinder/userfiles/files/24356058361.pdfIn PDF document text
    • https://bawwabatrizq.com/userfiles/file/tuwolitaxodepanafup.pdfIn PDF document text
    • http://tao-oita.com/admin/upload_filesfile/jatezewaja.pdfIn PDF document text
    • https://ltes.tw-goods.com/UserFiles/files/99748862918.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=part+time+interview+questions+and+answersPDF 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_off0000eada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADA 10760 bytes
SHA-256: 60153691cc324eb9e9b9bfeafb26c22b29270635bfc5a241f627796cfb3ed654
font_01_sfnt_off00010377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10377 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011b89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B89 18328 bytes
SHA-256: a23efa2d95ef468a5c945b1def0d5b6c2a3209bdbbd4a260b60eb2a7a16c7f89