Malicious PDF — malware analysis report

Static analysis result for SHA-256 0218349033cc1f6d…

MALICIOUS

PDF

79.8 KB Created: 2021-09-07 04:02:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1b9958e8c0a1fc21f96554e57a84f499 SHA-1: 19f6ff2d8f086e045a05ebfd816e91f8034ec61e SHA-256: 0218349033cc1f6d92fd00a71049ca33e341ce9fd1cbeb6827d7353427ff0451
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other domains, likely serving as a distribution point for phishing or malware. The presence of multiple external URIs and link farm heuristics strongly suggests a malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/e4c3df8f40e19f6ceaee4d84f4cd5188/dixawukebovabukatonipake.pdf
    • http://mevlanaasm.com/resimler/files/10647600448.pdf
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609c019aecf90---15369169973.pdf
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/6800fdbd2d571561e3e80c80d7d8f5c2/17939963890.pdf
    • http://nitexprofi.cz/userfiles/file/48821628788.pdf
    • https://futuresbuilder.net/dayafter/uploadimages/newsimages/file/95546470153.pdf
    • http://chanakyaaerospacedefence.com/userfiles/file/bimeromif.pdf
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1b26240c4d87f7b6674daa028aeae00d/34099910454.pdf
    • http://geojeoceanhotel.com/userfiles/file/20210812034924.pdf
    • https://speedwayinfo.hu/uploads/file/86483870536.pdf
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16136332ef3f79---goxudaz.pdf
    • https://afmiletisim.com/resimler/files/nurasosunetimomiv.pdf
    • http://www.agot.pl/upload/file/42766516184.pdf
    • https://www.ppmcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/c1h54fe63fc45uhhu4gg8ad9k8/xalewidakewozet.pdf
    • https://kozhikodedeaf.org/admin/my_files/file/45897730718.pdf
    • https://usgcambodia.com/userfiles/file/14536677654.pdf
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160bafc919beb5---98898863337.pdf
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/rkecsfteq65j1531v5n1gfji9c/vetifugozosemaf.pdf
    • http://doctour.hu/uploads/ckfinder/userfiles/files/20345291302.pdf
    • https://sonntag-immobilien.lu/userfiles/files/9219582696.pdf
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16078759dcbe29---77874712840.pdf
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/10579b01bc9c994e5a01eccd2832dc98/7675045483.pdf
    • http://valsadindustries.com/userfiles/file/vivefobutuzenabonukasog.pdf
    • http://driscollandgibson.com/images/edit_images/file/jopapefasevo.pdf
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/o2gngn9v9ndah5nm3cmcl383c7/70917870954.pdf
    • http://cn-junsheng.com/upload/file///202181485685772.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=vigilar+y+castigar+pdf+gratis
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfdd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCFDD 16792 bytes
font_01_sfnt_off0000e7f4.bin
c1699af33e502c32b4c6e6f5d071aca80f40f862d7b8e05d8eebb46f6adb574d
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F4 10520 bytes
font_02_sfnt_off0000ffd2.bin
5f83dd5e8c30ed75799a5169e8a2bea88e0c8c8e064a788de5914e090f93aa61
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD2 19132 bytes