Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2049c99c8788180…

MALICIOUS

PDF

67.9 KB Created: 2021-09-17 08:59:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0b14359b4b5b808a9a482764d52f9f2f SHA-1: 91dfc69bb71acfe637d1d50258de38f114a03c76 SHA-256: e2049c99c878818034a3a039cc0bc929e1c5888dc99253f13a0d0969305b9ca5
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. Embedded JavaScript is present, which could be used to facilitate the redirection or download of malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5231

Heuristics 5

  • 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.
  • 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
  • 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://drafthe.ru/uplcv?utm_term=grid+autosport+free+download+full+version+for+android PDF link annotation
    • http://at2apigroup3.com/contents/files/dizebitujaxafajazevolemux.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/vuponika.pdfIn PDF document text
    • https://morganmethod.com/ci/userfiles/files/17111026543.pdfIn PDF document text
    • http://chinalabware.ru/d/files/55057400865.pdfIn PDF document text
    • http://koszyczarek.pl/userfiles/file/gagizusodamukevuverogate.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/5fd8799d85e51f2588b4db03f6a145a1/95115276016.pdfIn PDF document text
    • https://soosekszer.hu/upload/files/80412132328.pdfIn PDF document text
    • http://karimeh.com/public/userfiles/file/1487416510.pdfIn PDF document text
    • http://hiro-seiko.com/upload/files/pefunene.pdfIn PDF document text
    • http://mamaskitchenorder.com/uploads/files/kovojopuzutovinogodi.pdfIn PDF document text
    • http://sarigol.kr/userData/ebizro_board/file/66186798244.pdfIn PDF document text
    • http://utcsp2.rustyramone.com/uploads/files/fixisuwitusutivibe.pdfIn PDF document text
    • http://akifkasaboglu.com/esatfisek/images_upload/files/zizakedupisoz.pdfIn PDF document text
    • https://vinacoma3.vn/userfiles/file/jobuvinuruja.pdfIn PDF document text
    • https://limsurdua.com/contents/files/5019616258.pdfIn PDF document text
    • https://henuopack.com/d/files/93856769334.pdfIn PDF document text
    • http://zubrcup.by/files/files/kepulafumitafimetixej.pdfIn PDF document text
    • http://mutitar.com/user_img/files/vejibadivoz.pdfIn PDF document text
    • https://birgatour.mn/js/ckfinder/userfiles/files/kufudinim.pdfIn PDF document text
    • http://rheumatology.institute/upload/content/file/25582202039.pdfIn PDF document text
    • http://fskyok.com/uploadfile/files/76455086242.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/71dd5hem68f68bcutmf499lua2/43013543529.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/82748746146.pdfIn PDF document text
    • http://kronikarp.pl/ckfinder/userfiles/files/nifanakiso.pdfIn PDF document text
    • 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_off0000bc58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC58 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d46a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD46A 16136 bytes
SHA-256: 341eecc05252e8fd0f64b16299c4b74084c828e72e056e10238bf9c38b9aace2