Malicious PDF — malware analysis report

Static analysis result for SHA-256 68cc1156aab5617f…

MALICIOUS

PDF

82.6 KB Created: 2021-09-13 09:12:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: fa888c848eff650d8cdcecbda107f9a4 SHA-1: 210fa6f5bb1346192584f7123717700d3bbb3b23 SHA-256: 68cc1156aab5617fa80592861ac226146516287eab0138f782c35af9214a48cc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to potentially malicious domains and are flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://bobhendrix-law.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/ziwulirivatabifu.pdf In PDF document text
    • http://zonwering-nederland.eu/ckfinder/userfiles/files/62316680646.pdfIn PDF document text
    • https://yaofangpeixun.com/upload/files/77800546287.pdfIn PDF document text
    • http://cadelupo.it/userfiles/files/komiwatafojumakan.pdfIn PDF document text
    • http://www.heksan.com.pl/file/junufazikijusatuxudo.pdfIn PDF document text
    • https://wegofa.com/userfiles/file/99036998344.pdfIn PDF document text
    • https://mbamantra.com/ci/userfiles/files/61662052683.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161347e00be7f7---5227456460.pdfIn PDF document text
    • http://e3edu.vn/public/ckfinder/core/connector/php/connector.phppublic/uploadsfiles/vanekafupuvejulifixipiren.pdfIn PDF document text
    • http://heydarbaba.org/resimler/files/wemigujoguralevoniz.pdfIn PDF document text
    • http://cameralehiep.com/hinhanh_fckeditor/file/30326204081.pdfIn PDF document text
    • http://eastcity.hu/ufiles/file/77002648906.pdfIn PDF document text
    • http://didopack.com/files/joviz.pdfIn PDF document text
    • http://montpellier-business-plan.eu/mbp/upload/images/images/upload/ckfinder/81150325521.pdfIn PDF document text
    • http://millecolori.it/images/file/sonosafuvuruvizixizojam.pdfIn PDF document text
    • https://andhimazhai.com/images/files/58361625059.pdfIn PDF document text
    • http://bolshunoff.ru/images/wysiwyg/file/foronejubirubezifo.pdfIn PDF document text
    • http://fujieshubao.com/zk/UploadFile/file/2021091308015173499.pdfIn PDF document text
    • https://iwanbim.iwan.co/userfiles/files/tudizad.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1613a89481d46b---1993894152.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/12018548593.pdfIn PDF document text
    • http://virus-safe-zone.com/ckupload/files/sutudi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=toffee+for+android+tv+apk+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_off0000dbcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCF 18868 bytes
SHA-256: 3c1b8c7f4bbc88d9a027a7b03833e087e211748e710dd0bed2d67e60fe9e3af4
font_01_sfnt_off00010d30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D30 10528 bytes
SHA-256: 0e4dcb470249ecedf169ec71ce5eb65a2570c1358ffef95fd801e546e147d026
font_02_sfnt_off00012556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12556 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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