Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8d54d6d64e41fb2…

MALICIOUS

PDF

81.0 KB Created: 2021-10-12 13:53:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 41e896393868dd4dc6dc9bd056a07c90 SHA-1: d86ed55fcecb6b292dbc4e8d852a3cb0fc230474 SHA-256: d8d54d6d64e41fb276f818841b93463c1e8c7500ba6a18d258e5a879f224d723
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier with high confidence. It contains numerous external URLs, many of which are hosted on disposable domains, indicating a link farm or phishing lure. The PDF structure and embedded content suggest it is designed to redirect users to malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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.
  • 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://yourhandmadeitems.com/userfiles/file/74221888190.pdf In PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614bbda40aa38---70691050241.pdfIn PDF document text
    • https://tenekedjieva.com/uploads/file/87049861674.pdfIn PDF document text
    • http://privateeducation.sg/verzsape/demo/upload/admin/files/20262242283.pdfIn PDF document text
    • https://demoliman-host168-com.twbiz.me/data/html_editor/files/siven.pdfIn PDF document text
    • http://cx-gl.hu/images/files/18259525300.pdfIn PDF document text
    • http://www.enfersalus.com/ckfinder/userfiles/files/xijejesadadorerut.pdfIn PDF document text
    • http://ashioke.com/images/library/File/mafopurati.pdfIn PDF document text
    • http://motorlustor.net/userfiles/file/dakomawux.pdfIn PDF document text
    • http://besttailor.info/ckfinder/userfiles/files/83610774326.pdfIn PDF document text
    • https://ud-hobby.com/images/Upload/file/36831494148.pdfIn PDF document text
    • http://www.bash.cl/media/file/nezojet.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/07022912668.pdfIn PDF document text
    • http://lapawan15.com/shop/fck_file/file/34395952212.pdfIn PDF document text
    • http://alacarte-grafik.de/userfiles/file/15842153190.pdfIn PDF document text
    • https://groupekheidri.com/ckfinder/userfiles/files/91003579371.pdfIn PDF document text
    • https://cincia.ro/ckfinder/userfiles/files/4398840183.pdfIn PDF document text
    • http://a-aqua.fr/ressource/site-image/files/7739765669.pdfIn PDF document text
    • https://egca.fr/userfiles/file/vujener.pdfIn PDF document text
    • http://taigesw.com/upload/files/mazokedorewufakagu.pdfIn PDF document text
    • https://monyetmesum.com/contents/files/kuratiwogoj.pdfIn PDF document text
    • http://thietkewebbacninh.com/webroot/img/files/gugosuzofef.pdfIn PDF document text
    • http://mail.me.ntou.edu.tw/ckfinder/userfiles/files/20210905_010132.pdfIn PDF document text
    • http://cukorbetegshop.hu/files/kipikutodavosubi.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/oscUj7J0Gjw/uplcv?utm_term=growing+red+beans+in+containersPDF 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_off0000d52a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD52A 18632 bytes
SHA-256: 584399c7520b9d55d5064fd5fe688b50e15641936f45c8ae80e611bc6af29111
font_01_sfnt_off000105f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F8 10764 bytes
SHA-256: f413a0ae326836aecd763cf9fc77d959f0165545cafce1d56bd93ea7beee4708
font_02_sfnt_off00011ec4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EC4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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