Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ad05652512c21f3…

MALICIOUS

PDF

74.1 KB Created: 2021-09-15 13:11:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c20b330bc3e6ad5459a863a37b94965c SHA-1: 444d298a3a002feccfea47390fc17c0829464fc1 SHA-256: 0ad05652512c21f39cbf220c27948c065a6ae9919eb9d2fd2ed0653e57eb1ee0
156 Risk Score

Malware Insights

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

This PDF file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It functions as a link farm, hosting numerous URLs that point to potentially compromised websites or disposable hosting, designed to lure users into clicking malicious links. The presence of multiple external URIs and a link farm heuristic strongly suggests a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://biemmecommerciale.eu/userfiles/files/bujosimume.pdf In PDF document text
    • http://tavaszitura.eu/userfiles/files/jozone.pdfIn PDF document text
    • http://tcyy88.com/userfiles/file/2021091021085073499.pdfIn PDF document text
    • http://ailizia.com/userfiles/23485723323.pdfIn PDF document text
    • http://meandnetworking.com/ckfinder/userfiles/files/wusuguli.pdfIn PDF document text
    • http://krukaiart.com/userfiles/files/gosukurasivurudegetov.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161316aa15e839---banijujezeditotex.pdfIn PDF document text
    • http://bojovesporty.cz/userfiles/file/26985771033.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec4fdb77c1---77668645249.pdfIn PDF document text
    • http://cesishotel.com/res/wysiwyg/file/46414923794.pdfIn PDF document text
    • http://ulsantour.com/FileData/ckfinder/files/20210909_CD7AC0FB975E2BE8.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/06aaa0f6316c2dcd50a323e812be267b/pebirepepawava.pdfIn PDF document text
    • http://votejoedestefano.com/editorData/file/xiligitunovovuzujareb.pdfIn PDF document text
    • http://farmandari-sarvestan.ir/images/news/files/rozubesuju.pdfIn PDF document text
    • http://stigstudiotecnico.it/userfiles/files/9801664354.pdfIn PDF document text
    • https://rsebolivia.org/userfiles/file/86781406513.pdfIn PDF document text
    • https://gea99.com/ckfinder/userfiles/files/lifido.pdfIn PDF document text
    • http://tindangnhadat.vn/upload/files/18600805913.pdfIn PDF document text
    • http://songpinhao.com/userfiles/files/dosimekel.pdfIn PDF document text
    • http://m-s-g.ru/userfiles/files/rogabakirijawedepasuw.pdfIn PDF document text
    • http://atlonnuri.org/UpLoadImage/editer/files/79604652334.pdfIn PDF document text
    • http://riccaassociati.eu/userfiles/files/85530935538.pdfIn PDF document text
    • http://cerritos.songhakbbq.com/uploads/files/35845863197.pdfIn PDF document text
    • http://e3edu.vn/public/ckfinder/core/connector/php/connector.phppublic/uploadsfiles/wazogenofet.pdfIn PDF document text
    • https://marathonblainville.com/userfiles/files/vexotare.pdfIn PDF document text
    • https://iamtimeshare.com/userfiles/file/gikobopi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=3x3+f2l+algorithms+pdfPDF 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_off0000bfb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFB6 16328 bytes
SHA-256: eb98c5f4cabe616eafb4476c4a859a6256a5ef68c57721b9e0d04797db81a4fe
font_01_sfnt_off0000e9a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000101b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101B9 11008 bytes
SHA-256: 8e5d7615e2bde2649b9261110cda8fe1a5613edc9fe80f764877e04035a3052b