Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae5c6c4db5feef0e…

MALICIOUS

PDF

71.2 KB Created: 2021-09-23 18:14:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 339f019939754658012eb6f4c3534516 SHA-1: 2787d7b1015ccfbc41a0d65a9d773405578e77b2 SHA-256: ae5c6c4db5feef0e38ef84f9028f47e133aa3f1da64c09c6e97b3707d0338c55
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to various domains, many of which appear to be part of a link farm designed to obscure the ultimate destination. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of malicious intent, likely to direct users to phishing or malware sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to potentially harmful content, aligning with a phishing or content-luring attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16139d9c078270---wamakaxivaxezaperosin.pdf In PDF document text
    • http://kfoodntea.com/dataroom/file/xajerulajopesaweturanor.pdfIn PDF document text
    • http://consade.com/userfiles/file/67348355854.pdfIn PDF document text
    • http://skupka54.ru/upload/m/jitozuweboveneze.pdfIn PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/48651725144.pdfIn PDF document text
    • http://liqaa-lb.com/files/userfiles/files/feruzuvuvorajixewapij.pdfIn PDF document text
    • http://viettelhaiphong.me/data/dulieu/files/penemogojesewo.pdfIn PDF document text
    • http://cctsw.net/whly/up_files/FCK/file/20210910_142536_194.pdfIn PDF document text
    • http://vattuxaydunghl.com/userfiles/file/dajifekifipodu.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16138492ac5560---32541217500.pdfIn PDF document text
    • http://moskvaznaet.ru/upload/files/fupupo.pdfIn PDF document text
    • http://goksirkrupskimlyn.pl/img/upload/files/33567220964.pdfIn PDF document text
    • http://fotografoenricogiampieri.it/userfiles/files/54673679407.pdfIn PDF document text
    • http://campbellelectronics.com/uploads/woxawefobetukokubozix.pdfIn PDF document text
    • https://clap-bas.com/userfiles/file/nebuxapevagububunaj.pdfIn PDF document text
    • http://www.ondebiz.com/userfiles/file/jufafekosokif.pdfIn PDF document text
    • http://damnoen.com/ckfinder/pho/files/52776732107.pdfIn PDF document text
    • https://pchome.uzai.ca/upload/files/58979382288.pdfIn PDF document text
    • http://magooferta.pl/uploads/fck/file/fogojedol.pdfIn PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/zulotugowobi.pdfIn PDF document text
    • http://szyldkj.com/luodan/images/userfiles/file/nudatirukuw.pdfIn PDF document text
    • https://sergiomauri.com/images/file/tazewuzawekozekimuped.pdfIn PDF document text
    • http://a1-automotivegroup.com/upload/files/56325556298.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=pokemon+crystal+rom+3dsPDF 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_off0000b495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB495 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ccac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCAC 10816 bytes
SHA-256: 338593f615c66e9fe9f034df6a3e0ff354a99013b8e5dc1ba2c8a752d22f67b0
font_02_sfnt_off0000e5b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B8 16348 bytes
SHA-256: 1f9693873768591eb1a0891ccf548cf578ddd3ab6bc942c0d07eafe3d399f79b

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