Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee05ed4cd33ed7c7…

MALICIOUS

PDF

70.8 KB Created: 2021-09-10 00:01:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 89a96997da230d5d1efc119e4fa9c196 SHA-1: 916cfd4346654a9f4e13106629d3726f37e37280 SHA-256: ee05ed4cd33ed7c7f35eb06ad6e734581d065d32fe2656dfb80f2a7aeac4770b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with one heuristic identifying it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://booburger.myagenda.cz/pictures/editor/files/najosadodavijoge.pdf In PDF document text
    • http://leaguengn.com/userfiles/file///jojola.pdfIn PDF document text
    • https://pokereshop.cz/data/file/18581805464.pdfIn PDF document text
    • http://pribatu.lamilagrosaimport.com/images/files/kojirisinub.pdfIn PDF document text
    • http://tko.wavedev.net/img/files/files/6741919921.pdfIn PDF document text
    • https://projetounificado.com/uploads/files/19916805934.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16139fbc344c0c---puzonezo.pdfIn PDF document text
    • http://wpklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tidovokerevi.pdfIn PDF document text
    • https://maharajganjtimes.com/assets/ckfinder/core/connector/php/uploads/files/87335826628.pdfIn PDF document text
    • http://muabannhagiare.net/images/uploads/files/lixifurowoteba.pdfIn PDF document text
    • http://kondicionery-shodnya.ru/upload_picture/file/61889045047.pdfIn PDF document text
    • http://jnmindia.com/outscapes/admin/ckeditor/uploads/ck/files/75763330750.pdfIn PDF document text
    • http://insei.eu/userfiles/files/juniwarajovitakamoribe.pdfIn PDF document text
    • https://www.zolmedis.lt/ckfinder/userfiles/files/puzusolipi.pdfIn PDF document text
    • http://sahcarpets.com/userfiles/file/83603233186.pdfIn PDF document text
    • http://twsl.mingann.info/upload/ckfinder_temp/files/20210904140120.pdfIn PDF document text
    • https://baruipur.org/ckfinder/userfiles/files/budagukelidenasejul.pdfIn PDF document text
    • http://sasolution.kr/userfiles/file/11440316416.pdfIn PDF document text
    • https://dpengineers.info/admin/userfiles/file/nupunokedagosiwogavosibe.pdfIn PDF document text
    • http://houselandia.ru/files/92229173353.pdfIn PDF document text
    • https://xn--80ag1a2a.xn--p1ai/files/file/sowara.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=free+psychometric+test+for+seafarersPDF 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_off0000b651.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB651 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ce68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE68 10688 bytes
SHA-256: 81dc47c06d56144b4bc212c9431d31f96aa7c46006a11bb1d81e71720dcf8baa
font_02_sfnt_off0000e6fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FC 15492 bytes
SHA-256: da877d09f6e47e4d48a1ae5a258c353c2a92ae3cd6877a522e709561b2e24a93

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