Malicious PDF — malware analysis report

Static analysis result for SHA-256 52427bf7c2886bac…

MALICIOUS

PDF

69.3 KB Created: 2021-10-03 17:05:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 8fbf15bafb16dfb4797dffdc25564f33 SHA-1: 5ae6db600e87352f6cba3fc514f1d3e0abd9e227 SHA-256: 52427bf7c2886bacae840838bd12594fa72e3cd3be157aabf864d53503db5367
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated high maliciousness. The document contains numerous embedded URLs, many of which point to disposable hosting, suggesting a link farm designed to redirect users. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://fairway.cc/images/blog/file/43680950660.pdf In PDF document text
    • https://kaxtongroup.com/home5/maxconne/public_html/kaxtongroup/assets/images/newspostimages/files/jinex.pdfIn PDF document text
    • https://sardavetri.it/userfiles/file/78130785179.pdfIn PDF document text
    • http://soles2walk.com/data/file/kijibisaboxib.pdfIn PDF document text
    • https://faceless.me/userfiles/files/21675410223.pdfIn PDF document text
    • https://questyme.ca/userfiles/file/rodazito.pdfIn PDF document text
    • http://solyaris.pro/admin/ckfinder/userfiles/files/gaxopanupomokexoli.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/076c3a2fc38839d3be8e6c996276ba76/xujunotogebosisodogip.pdfIn PDF document text
    • http://camel-republic.com/media/userfiles/files/wugiloxovikukiduvaboxuzin.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/b00f5b86dd810f11b0d6051fb8643e38/savutoxamejigopolumovifa.pdfIn PDF document text
    • http://romengo.com/ckfinder/userfiles/files/45632112167.pdfIn PDF document text
    • http://taihegas.com/filespath/files/20210929131728.pdfIn PDF document text
    • http://diagcorlifescience.com/attachment/file/39517500225.pdfIn PDF document text
    • http://maiodi.com/userfiles/files/45652906163.pdfIn PDF document text
    • http://rapabzenec.cz/obrazky/files/kofezusib.pdfIn PDF document text
    • https://oxi-dental.ro/imagini_ws/winunukejaxas.pdfIn PDF document text
    • https://tebra.si/userfiles/file/62691938862.pdfIn PDF document text
    • https://globalybm.com/ckfinder/userfiles/files/1632347679.pdfIn PDF document text
    • http://surestegc.org/documentos/file/zekedofalezetevigisotebu.pdfIn PDF document text
    • https://swift-tw.com/lcc/upload/files/94396707430.pdfIn PDF document text
    • http://chinawin-consult.com/userfiles/10667162279.pdfIn PDF document text
    • https://www.mtiwelding.co.uk/admin/ckfinder/userfiles/files/fiwuguvaxuwodo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=lyden+chappell+%26+dewhirst+ltdPDF 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_off0000b047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB047 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC859 15936 bytes
SHA-256: 994a3c425f71a4b691884ce841bbe103be289d77a2625cce0ef2f6049303d914
font_02_sfnt_off0000f14e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF14E 10104 bytes
SHA-256: d84d45e88a7d857c204f2233063b96ffd813e61c1c2547577eec5f51349ee3a1

Open this report in the interactive analyzer, or submit your own file for analysis.