Malicious PDF — malware analysis report

Static analysis result for SHA-256 e095baa54a80d6ca…

MALICIOUS

PDF

71.9 KB Created: 2021-09-13 12:46:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ead0dd888e0935c04fc6e60c29d8204b SHA-1: 6c0227df279bacb3a39373315dad8dddccd318ca SHA-256: e095baa54a80d6ca730d01d2f8a3f274625fcb26f7a3aed459833ed875bfaa3e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristic analysis revealed it functions as a link farm, embedding numerous URLs, many of which point to potentially malicious domains. While no scripts were directly extracted, the PDF structure and embedded links suggest it is designed to redirect users to sites that likely host further malicious content or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://aymexco.eu/ckfinder/userfiles/files/62869242353.pdf In PDF document text
    • http://lexxyin.net/files/fckeditor/file/98274360359.pdfIn PDF document text
    • http://xn--hh0b97d8is16e.com/userData/board/file/46288405193.pdfIn PDF document text
    • https://southafricapools.com/contents/files/53132231628.pdfIn PDF document text
    • http://oasishs.com/uploads/files/20210903_040843.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613506cc6b385---sesosogegevixudubo.pdfIn PDF document text
    • http://bytip.net/filespath/files/20210906013520.pdfIn PDF document text
    • http://lisaarkin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gutukokulasitad.pdfIn PDF document text
    • http://linyuepharm.com/upload/files/83720616857.pdfIn PDF document text
    • http://hairfibers24.com/upload/file/tikidajiz.pdfIn PDF document text
    • http://tythb.com/uploadfile/files/68578204638.pdfIn PDF document text
    • https://makiriaszto.hu/ckfinder/userfiles/files/58398806596.pdfIn PDF document text
    • https://foodthings.us/userfiles/file/zapezezasun.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/g6radn6q6tmbvphidau74b20u2/20892528341.pdfIn PDF document text
    • https://kiaavcilar.com/upload/ckfinder/files/27962541513.pdfIn PDF document text
    • https://chupwo.com/editor_upload/file/40449529492.pdfIn PDF document text
    • http://coomargroup.com/ckfinder/userfiles/files/65359608400.pdfIn PDF document text
    • https://ctners.com/ckfinder/userfiles/files/49806324005.pdfIn PDF document text
    • http://anhhieu.vn/hinhanh/file/22657863834.pdfIn PDF document text
    • https://etest.vn/app/webroot/uploads/files/mojofalewifef.pdfIn PDF document text
    • http://ecovn.vn/uploads/news_file/jiwovomitosevusibaruzunax.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=harry+potter+and+the+order+of+the+phoenix+full+movie+fmoviesPDF 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_off0000b4a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ccb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCB8 11136 bytes
SHA-256: 547c140486d12b22f58549f9b157a87f8eaa4e6e552d94d8cea4ca8655bdd35f
font_02_sfnt_off0000e682.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE682 16820 bytes
SHA-256: a10dec81e4bed45f398a380cd2812322cbdc312d5ccfc5c7f824a58ad4bb48b5

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