Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1fb883fd288aaba…

MALICIOUS

PDF

76.8 KB Created: 2021-05-10 21:30:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d18408adf423f78a1198fed876937fad SHA-1: d73873cf99ad339862238778f82653b040e0ef8a SHA-256: c1fb883fd288aabaa1c6409d0afeabfa0f26765b8a3d78b41eca71c013acacf0
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL, https://queure.ru/uplcv?utm_term=best+australian+formal+dress+websites, suggests a phishing lure, likely attempting to trick users into visiting a compromised website. No scripts were extracted, but the presence of embedded URLs and the overall detection profile strongly point towards a phishing or credential harvesting campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://queure.ru/uplcv?utm_term=best+australian+formal+dress+websites
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a451aadb6---kuliwusotudek.pdf
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/dffa010dddd068590a282799a241dc2e/96304078237.pdf
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/872bc9a8e1ac1b28d89308d111fde4ab/puputobub.pdf
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/67fb4b7ee5361000e56391876e6df2d8/48608932403.pdf
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16074808f0ce89---wokate.pdf
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160766048d6c40---kaxukakeremufud.pdf
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/8a15c6f60f15e366f5984ae881488ba5/wiledavaxes.pdf
    • http://jtour.vn/userfiles/file/82326606737.pdf
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608259469a3f0---33849916077.pdf
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/16lh6g8m0dh2httvusmktjigb2/nulojodosafexibizot.pdf
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd5a4e6f8a---17974164769.pdf
    • http://xn--clinicaquirogavilario-vbc.com/wp-content/plugins/super-forms/uploads/php/files/r4rj0volco93fjd5s0639daul1/pejajekesukaga.pdf
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/780bc2cb63f9a4c4fa5d3b5b0ba6c304/sipekefoj.pdf
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/075e2fb2055ea52d2a62e0f62bbefb97/rijepowukeguzijas.pdf
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/804ecf26b596524cf9000bf13cba987a/badibadata.pdf
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1608b70d771825---kupoze.pdf
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086b2d0633a3---63369887280.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed05.bin
1a7f6205b9a5ceb4264e5903338ab74edec8be9bf662a76c40d34ef194d78fd4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED05 5332 bytes
font_01_sfnt_off0000ff21.bin
c7dad1163f3794483d38cdef21a9dcf6e62038929b576ad36266c4d24d4e6bb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF21 11724 bytes

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