Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3920ec96ec91b13…

MALICIOUS

PDF

64.0 KB Created: 2021-09-28 09:52:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: ef058ffcd94e08ed395a3392f3c02df0 SHA-1: 575161d7f3a85cf733f7dd54b9919028a1257ab5 SHA-256: e3920ec96ec91b1328be79c87f5e4fec93c7b217f068b9494f4871ee7bf1add3
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting. ClamAV detection and ML classification further indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's part of a phishing or malware distribution chain, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5661

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://qhchemicalsfeed.com/upload/files/kovukuzotasavodomo.pdf In PDF document text
    • http://www.mezmat.ru/ckfinder/userfiles/files/bapujekoroxalate.pdfIn PDF document text
    • http://kastely-vacduka.hu/fileok/file/dukugimesenabupoxaxijekib.pdfIn PDF document text
    • https://behbehaniprojects.com/uploads/files/zizomejavefunadagadu.pdfIn PDF document text
    • http://xinxinhouseware.com/uploadfile/files/tobomolapogeg.pdfIn PDF document text
    • http://xn--oy2b19v1mb1yi.com/userfiles/file/fadiromixugovo.pdfIn PDF document text
    • http://geoodwierty.pl/files/file/99589474230.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/qp90uqs5d7u3nf3lmtq9bl9udn/ziwagobaxosolilatar.pdfIn PDF document text
    • http://eternoohydro.com/d/files/12676848530.pdfIn PDF document text
    • https://sahyadrisevasanstha.in/userfiles/file/fatajifozavokupar.pdfIn PDF document text
    • https://sanagustin.cl/files/11549619244.pdfIn PDF document text
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/53171450781.pdfIn PDF document text
    • http://qzgj.cn/upload/file/resuno.pdfIn PDF document text
    • http://branonperformance.com/ckfinder/userfiles/files/67514322621.pdfIn PDF document text
    • http://www.hermosabeachbungalows.com/userfiles/files/jilaw.pdfIn PDF document text
    • https://coaching-jk-academic.com/ckfinder/userfiles/files/lutuluwojuvamubarefusewu.pdfIn PDF document text
    • https://hideab.se/tc/Mediagalleri/file/xowoxuguduxosewi.pdfIn PDF document text
    • http://solarexperten.ch/fckeditor/editor/images/file/warenuravile.pdfIn PDF document text
    • https://rallstarawards.us/nbloom/fckuploads/file/50984471229.pdfIn PDF document text
    • http://www.smwiarus.pl/ckfinder/userfiles/files/45092730983.pdfIn PDF document text
    • http://sunrui-ti.com/d/files/4423529593.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/0fbdqlro6umu1nis60mdk9qema/sadigejugileguvanu.pdfIn PDF document text
    • http://bygreenpure.com/userfiles/file/zesuremigitojadu.pdfIn PDF document text
    • http://salonorganica.ru/upload/files/balivunuseguwuxawakukeb.pdfIn PDF document text
    • http://mayinluatudong.com/uploads/userfiles/file/48255765146.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=mario+royale+unblockedPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB192 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c9a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9A9 10536 bytes
SHA-256: 281d72aad61de3dc466b6e030afaed6e884583c1baaf66aca24295c4b765d7e7