Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d365b3a5f6f7279…

MALICIOUS

PDF

78.3 KB Created: 2021-09-18 16:24:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ffacddfb875b25e543a86da77962a80e SHA-1: dc69bd909cb69ac5425036935955261421dfd2b4 SHA-256: 6d365b3a5f6f7279a9a019e62806c2017687677788afb3d200b3181042084907
134 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external URIs, indicating an attempt to redirect the user to malicious websites. ClamAV detection as 'Pdf.Phishing.Trojan' and the ML classifier's high score further support its malicious nature. The embedded JavaScript likely facilitates the redirection or execution of further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://wastran.ru/uplcv?utm_term=how+to+switch+from+phone+storage+to+sd+card PDF link annotation
    • http://cycling-software.com/files/file/mitalazawijasuxevusavuro.pdfIn PDF document text
    • http://kuehllawpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bebojaxetenokok.pdfIn PDF document text
    • https://franchisefarm.franchiseharbor.com/files/files/31591197366.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613db539330eb---64500360240.pdfIn PDF document text
    • http://epoch-making.jp/js/upload/files/binodemobes.pdfIn PDF document text
    • https://www.abandassociates.com/ckfinder/userfiles/files/65575251445.pdfIn PDF document text
    • http://uslugi-ogrodnicze.pl/pliki/File/dirumalegaragetopenasi.pdfIn PDF document text
    • http://mariekevanvlierden.nl/survey/userfiles/files/80341657551.pdfIn PDF document text
    • http://ergo-logo-bamberg.de/userfiles/file/vimozagim.pdfIn PDF document text
    • https://dovolena-jiznicechy.cz/uploads/durenu.pdfIn PDF document text
    • http://symbioticlifetech.org/attfile/fckimg/file///20210911225547_583433975.pdfIn PDF document text
    • http://talani.nl/userfiles/image/file/vifen.pdfIn PDF document text
    • http://jfac.kr/ckfinder/userfiles/files/gexalitamamokurofoku.pdfIn PDF document text
    • http://tuvantindat.com/uploads/2021-09-03/images/files/65677512965.pdfIn PDF document text
    • http://vietcem.vn/public/default/ckeditor/files/puligugavosoduramikeso.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/2h65lhplrk0fd5ijp43gr4dm62/8191475631.pdfIn PDF document text
    • http://nomorecpapmachine.com/userfiles/files/82529227279.pdfIn PDF document text
    • http://saigonradio.com/userfiles/file/relubolojunoluwe.pdfIn PDF document text
    • http://assotechne.eu/userfiles/files/jojawufofomanawavamemov.pdfIn PDF document text
    • http://iltorg.ru/upload/file/24360080594.pdfIn PDF document text
    • http://artin-intranet.com/ckupload/files/96755235328.pdfIn PDF document text
    • http://wenyanchem.com/upload/files/jetevekafuzisoxip.pdfIn PDF document text
    • https://bunyaminerdemir.com/resimler/files/14960270172.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/55813205690.pdfIn PDF document text
    • https://gamma-electronics-eg.com/userfiles/files/53610920009.pdfIn PDF document text
    • https://vietrocknet.org/app/webroot/img/files/zotonifofoma.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_off0000ce12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE12 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e624.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE624 17016 bytes
SHA-256: ce2422aa8fe7cfa532acae86088939ae19d64f85e7a7477755e91518506f1022
font_02_sfnt_off000111fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111FE 11096 bytes
SHA-256: ee8efab65e3a026b7ad7cae5afded01fc00138ad007ef9989abff25f6d9b7b83