Malicious PDF — malware analysis report

Static analysis result for SHA-256 59cdaae3945d2975…

MALICIOUS

PDF

80.8 KB Created: 2021-09-19 14:45:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 73a361092980e15caac4408f45e0f496 SHA-1: 31d626a4c94b0959cefd7985822cac767d81cd22 SHA-256: 59cdaae3945d2975a856afb226ed0193707d9b6112b281a66df1222821069922
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains numerous external URIs and is identified as a link farm hosted on disposable domains, suggesting a phishing or malware distribution attempt. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate the document's primary purpose is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://coretry.ru/uplcv?utm_term=heroes+arena+apk+mod PDF link annotation
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/25746633a7210d2dc679ffe8288d3549/7270902563.pdfIn PDF document text
    • http://manisafar.com/basefile/marcosafarir/files/kizosobikasadaxetija.pdfIn PDF document text
    • http://ordinate-ltd.com/file_media/file_image/file/55692044841.pdfIn PDF document text
    • https://harteron.ee/userfiles/file/kiwabigizolafepimowefaxe.pdfIn PDF document text
    • http://kanizsakran.hu/userfiles/file/58596685336.pdfIn PDF document text
    • http://babijie.com/upload_fck/file/2021-9-1/20210901094649241508.pdfIn PDF document text
    • https://uangraja.com/contents/files/wavipalapopoluwizagunire.pdfIn PDF document text
    • https://kompaspt2.com/contents/files/kepetolotodebexutoduw.pdfIn PDF document text
    • https://aiwcecckolkata.org/FCKeditor/file/20714119503.pdfIn PDF document text
    • https://clinicaalcantara.es/sites/default/files/userfiles/file/jawolinuxomupadaxedum.pdfIn PDF document text
    • http://business-plan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/xenokumojutapolazulafider.pdfIn PDF document text
    • http://studiotecnicolari.it/userfiles/files/32725808584.pdfIn PDF document text
    • http://www.rsvpcatering-ar.com/files/imagesfile/dopavuwajetodoniz.pdfIn PDF document text
    • https://unifor975.ca/userfiles/file/debotapalekupamajafonuk.pdfIn PDF document text
    • https://mkontakt.pl/dat/file/8303409532.pdfIn PDF document text
    • https://cardion.dk/gfx/fckimages/file/jaliwunuwurabuwu.pdfIn PDF document text
    • https://stollerco.com/testingsites/advantage_aviation/assets/media/file/kuzemuru.pdfIn PDF document text
    • http://techmechengineers.com/uploads/xojitazopinimotaw.pdfIn PDF document text
    • http://shipsupply.ru/userfiles/files/motidodezitogorafa.pdfIn PDF document text
    • https://girilawfirm.com/content_files/files/bixufazisu.pdfIn PDF document text
    • http://karcannakliyat.com/userfiles/file/mopomovo.pdfIn PDF document text
    • https://elegune.net/files/galeria/files/45925898085.pdfIn PDF document text
    • https://vaynhanh365.net/contents/files/mumobus.pdfIn PDF document text
    • 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_off0000d92e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD92E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f145.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF145 10400 bytes
SHA-256: b549adb7475591e47cc8b1c6a0f07383e864a78a640ae1cd1eda7185c1b52132
font_02_sfnt_off000108bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108BC 17692 bytes
SHA-256: 91cacba158c3e9af1000eb34dcd2027b34689ef7e3d73aad1015a0c4bc0c77a9

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