Malicious PDF — malware analysis report

Static analysis result for SHA-256 eebbb09ec3e07809…

MALICIOUS

PDF

82.2 KB Created: 2021-10-20 04:07:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 06d068a9fb7ee8dba5ccca0b19ba5ae3 SHA-1: e28129916a97d72c697d2958d685c56a52b6aeb7 SHA-256: eebbb09ec3e0780906f1b5fea51257061764b648cc269ba2348be132df7ec8b5
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URIs pointing to various domains, with one directly linking to an IP address. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or delivering a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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
  • 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://aleshashop.net/uploaded_files/userfiles/files/6972412688.pdf In PDF document text
    • http://diamantina-joaillerie.com/ckfinder/userfiles/files/mevufonaxuzopinunowegup.pdfIn PDF document text
    • https://ms02bet.net/contents/files/lulorumesubipo.pdfIn PDF document text
    • http://gabinetpro.gabinetpro.pl/kosmetyczka/krakow/files/deremofufupolomikakomene.pdfIn PDF document text
    • https://cremyco.com/app/webroot/docs/file/80065204264.pdfIn PDF document text
    • http://colorsoftexas.com/ckfinder/userfiles/uploads/23174160595.pdfIn PDF document text
    • http://change4best.ru/upload/file/sadutirusozupuxapuli.pdfIn PDF document text
    • https://salonrewards.ca/images/file/nojolikowexojugeronakil.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/4ed2407e147bec4b5d87b15fb1335605/79653477290.pdfIn PDF document text
    • http://www.kyousei-fukushi.or.jp/system/ckfinder/userfiles/files/22569866355.pdfIn PDF document text
    • http://w-w.cn/isee/pfm/cms/uploadfile/fck/file/zedefu.pdfIn PDF document text
    • http://nanouklid.cz/upload/file/94705929989.pdfIn PDF document text
    • http://plncse.hu/php_data/file/95641078762.pdfIn PDF document text
    • http://idrogastermoclima.it/Utentifile/FCKPage/file/70183540939.pdfIn PDF document text
    • https://aneri12.cz/res/file/dexujan.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16148c71d5043e---tumirikag.pdfIn PDF document text
    • https://kentacademymiango.com/userfiles/file/wamupoxomefirumoriwowa.pdfIn PDF document text
    • http://www.sudaff.com/pics/file/sikixalonuku.pdfIn PDF document text
    • http://studioboscono.it/userfiles/files/79005406600.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/19478807804.pdfIn PDF document text
    • https://derfo.info/resimler/files/94248366698.pdfIn PDF document text
    • https://mimpishiodua.com/contents/files/21163609768.pdfIn PDF document text
    • http://polipadel.com/userfiles/file/54986780296.pdfIn PDF document text
    • http://proclima-membranes.ru/userfiles/file/41394105663.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1615cd55a181cb---52937268042.pdfPDF link annotation
    • http://feedproxy.google.com/~r/Xvkpad/~3/tgwjJlsMqHc/uplcv?utm_term=long+vowel+o+worksheets+printablePDF 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_off0000ddb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f5cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5CB 10872 bytes
SHA-256: ae4dd2b87e76822ab1de5992ea20a46f1f0451cc539fefb9fa7514b175d1e542
font_02_sfnt_off00010eb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB3 17020 bytes
SHA-256: cf8a3f546a3f6ae8e23fb025747e2596f84012fb5d73987ed496564159b35ba7