Malicious PDF — malware analysis report

Static analysis result for SHA-256 08ee3128cee8df50…

MALICIOUS

PDF

75.7 KB Created: 2021-09-09 19:50:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-25
MD5: ca7a1d778d546cb6a3eb6691cc515c16 SHA-1: 4fb412868500f41afde0696bcf3402b94cae7e6d SHA-256: 08ee3128cee8df50747e93bf2cbf2cfb71de3e7379c65d31b1c2e41e7c662d81
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 https://uclerbaklava.com/resources/file/redemifurunabawizo.pdf In PDF document text
    • http://factblogs.com/uploaded_files/userfiles/files/jigefipebe.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/nonole.pdfIn PDF document text
    • http://strelnicebudejovice.cz/userfiles/file/50646650487.pdfIn PDF document text
    • http://onthebroadway.com/CPD/adminpanel/upload/file/96464897434.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/13582521274.pdfIn PDF document text
    • http://kamkmori.cz/ckfinder/userfiles/files/13392217397.pdfIn PDF document text
    • http://bnblspecialities.com/userfiles/files/20864629640.pdfIn PDF document text
    • http://elazentrale.de/images/uploaded/file/besevafirotusuwudadabi.pdfIn PDF document text
    • https://2winit.com/Files/files/14816390355.pdfIn PDF document text
    • http://restavratorstvo.com/ckfinder/userfiles/files/75005919064.pdfIn PDF document text
    • https://vleek.com/uploads/files/nodubakawa.pdfIn PDF document text
    • http://cross-winds.in/upload/contents/images/images/nufoponex.pdfIn PDF document text
    • http://tsg-vaganovskoe.ru/ckfinder/userfiles/files/18499430917.pdfIn PDF document text
    • https://binarbaidequipment.com/public_html/userfiles/file/kudopef.pdfIn PDF document text
    • https://exlite.it/ckfinder/userfiles/files/4035747401.pdfIn PDF document text
    • http://grandwatergatehotel.com/upfile_hotel/files/70788911051.pdfIn PDF document text
    • http://le-bouquet.be/userfiles/files/ximiponanapux.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/jamomeburefewojumoda.pdfIn PDF document text
    • https://discovercefalu.it/_data/images/file/juwadibimotoverexur.pdfIn PDF document text
    • http://synphabase.ch/upload/file/21750441128.pdfIn PDF document text
    • http://suachuaspa.com/upload/images-content/files/19232700637.pdfIn PDF document text
    • http://pttaccounting.com/userfiles/files/jutuba.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=zombie+infection+hd+apkPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c35d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC35D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000db74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB74 10764 bytes
SHA-256: e42f4d99eda61f18221028f5e5caf2702cd366e078a75eb656f5be90e8704092
font_02_sfnt_off0000f3d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D1 17712 bytes
SHA-256: 5fa61baa0edca5830ecc2573e974bd3637666168c24824f536667b38b54ee257

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