Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd0029e00dd460a3…

MALICIOUS

PDF

78.7 KB Created: 2021-09-08 20:58:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: 00f76a0617e4672103b50a2a39a935da SHA-1: 54f3dda1214f404771d20aecad4a09a6e7f31db6 SHA-256: dd0029e00dd460a3295df172a7e5d3a712bee364c9abfc001ba2d23ed6791fd4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 5

  • 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
  • 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://www.espace-hotelier.com/ckfinder/userfiles/files/jatanitukepokigilusi.pdf In PDF document text
    • https://ymy-tea.tw/upload/files/pitagorok.pdfIn PDF document text
    • http://montpellier-business-plan.eu/mbp/upload/images/images/upload/ckfinder/49736353338.pdfIn PDF document text
    • https://telewebmarketing.com/FCKeditor/file/radutowizilenadi.pdfIn PDF document text
    • http://snap-drone.com/userfiles/file/71503632182.pdfIn PDF document text
    • https://cincia.ro/ckfinder/userfiles/files/82094908711.pdfIn PDF document text
    • http://olgapolyakova.com/files/files/9219919750.pdfIn PDF document text
    • http://ericshartman.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/85435124948.pdfIn PDF document text
    • http://kochamsushi.pl/UserFiles/file/34230550696.pdfIn PDF document text
    • http://gucaoyun.com/uploads/file/011706093510.pdfIn PDF document text
    • https://vegan-eshop.cz/data/file/5203579582.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130ca83ab5ea---notulurifopap.pdfIn PDF document text
    • http://dlshixiang.com.cn/ckfinder/userfiles/files/2915980937.pdfIn PDF document text
    • http://www.srijonihealinghome.com/fckimages/file/vifenagukanowijulisoso.pdfIn PDF document text
    • http://studiopassarotti.it/userfiles/files/98358935570.pdfIn PDF document text
    • http://rothemtour.com/FileData/ckfinder/files/20210901_8B00B211709D7AF3.pdfIn PDF document text
    • https://lensmam.com/userfiles/file/94591801981.pdfIn PDF document text
    • https://mediaget.ru/userfiles/files/35076457708.pdfIn PDF document text
    • http://ipsaix.com/ckeditor/ckfinder/userfiles/files/40734273466.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/f6d8e3893f59992333a4027a3cbcc041/45943180775.pdfIn PDF document text
    • http://xn--aknmedcal-wpbe.com/uploads/file/77288406857.pdfIn PDF document text
    • http://shinex-auto.com/userfiles/file/kakilarazejenuvopazusu.pdfIn PDF document text
    • http://ericshartman.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zujejupijejug.pdfIn PDF document text
    • http://www.hausbaumesse.at/ckfinder/userfiles/files/10100685371.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=nimcet+books+pdf+downloadPDF 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_off0000cea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEA8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e6bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6BF 10976 bytes
SHA-256: 88f561c6263ce67c6af03969046cbaefe9d74b53e4644b90552a19bb6a31ec49
font_02_sfnt_off00010016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10016 17416 bytes
SHA-256: ab83112b2e9334b8493339352759b7e30acfc41bfc8a60fd9e3d6ff5c9e02f2f