Malicious PDF — malware analysis report

Static analysis result for SHA-256 6883142338637659…

MALICIOUS

PDF

67.1 KB Created: 2021-09-23 16:57:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d398cf741aa40ee89d25cfd9af56d2d7 SHA-1: c757bbab2ea4ad81df4684fc06988b00fa78be53 SHA-256: 6883142338637659725eeebb9677bb1f79865262c71dcfd9dee660297b79ea9c
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The heuristics indicate the PDF acts as a link farm, directing users to multiple external URLs, one of which is hosted on 'manu-transport.com'. While no scripts were explicitly extracted, the PDF structure and the presence of numerous embedded URLs suggest an attempt to redirect users to malicious sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5755

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://manu-transport.com/documents/file/rerafujovixunidexopa.pdf In PDF document text
    • http://nujhimachal.in/img/uploads/files/mobile.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/58820406681.pdfIn PDF document text
    • https://cissud.com/uploads/ck_editor/files/fimumeporanekoliwi.pdfIn PDF document text
    • http://triple-a.co.th/ckfinder/userfiles/files/jineviluxokenizilofulusim.pdfIn PDF document text
    • https://laser123.com/geektic/files/fopapewuk.pdfIn PDF document text
    • http://aimecostruzioni.it/userfiles/files/kozuv.pdfIn PDF document text
    • http://domexpo.ru/up/file/satune.pdfIn PDF document text
    • http://zhouzhuanx.com/v15/Upload/file/20219181214366073.pdfIn PDF document text
    • http://sinorarechem.com/upload/files/rerovupojipisumubijorari.pdfIn PDF document text
    • http://flynewsletter.com/uploads/file/38019067813.pdfIn PDF document text
    • http://www.catedralirodahaz.hu/data/editorfile/21281754418.pdfIn PDF document text
    • https://martensmgt.com/business_school/uploads/file/riwilar.pdfIn PDF document text
    • https://pvcmikser.com/upload/files/numunepinibejebidi.pdfIn PDF document text
    • https://concurs-euclid.ro/upload/fck/97872221577.pdfIn PDF document text
    • http://ingegneriarossi.it/userfiles/files/18186652653.pdfIn PDF document text
    • http://business-plan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/64333334124.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/dcb3c93bafe4b031a838cb1685b0003a/keruwadenuti.pdfIn PDF document text
    • http://sor1310.com/userfiles/file/xapekosufobava.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144e63fdaea6---ritoludokakas.pdfIn PDF document text
    • https://www.peltonfell.org.uk/ckfinder/userfiles/files/tomukarogumaxefepuruw.pdfIn PDF document text
    • http://greenbrier101.com/userimages/34917561545.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=tamil+2020+movies+downloadPDF 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_off0000ba49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA49 16468 bytes
SHA-256: a340f427e42ff0083a8304a03e1c60dcdaea77acdf4a2e5b3bb4c88ed13cec4c
font_01_sfnt_off0000e46c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE46C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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