Malicious PDF — malware analysis report

Static analysis result for SHA-256 207b8c18126bb911…

MALICIOUS

PDF

96.4 KB Created: 2021-06-27 23:08:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a00e0e35edb3c6eae508b7938e08259a SHA-1: 795bde0d96109e69dbe94e7bf8e3e666d06aec88 SHA-256: 207b8c18126bb911f16bdf4b4fd210e2fff8dc0649d9356545283b620ae0096b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised WordPress upload storage and other domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The sample's structure and link farm behavior are consistent with a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://lamaisonducoeur.ca/upload/editor/file/velolovaletalamaboxiwomu.pdf
    • https://zionapostolicministries.org/uploads/file/paniforet.pdf
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/1c4bd57e56e873b2828c40f1dae165bd/karadarevapexibinogafetos.pdf
    • https://avvocatoboretti.it/file/zikodisebozososufobimaken.pdf
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160cb27aac85f5---15153783700.pdf
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/b00281ec14e8a9020e5ee5a8f68e5201/1263745758.pdf
    • http://braciszewska-klimek.pl/fck_files/file/nugoro.pdf
    • http://haiphongcontest.com/images/files/ranaxekunav.pdf
    • http://bearings-home.com/userfiles/file/91310602427.pdf
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a36055dcf66---25754745849.pdf
    • http://zelene-centrum.cz/webpagebuilder/ckfinder/userfiles/files/30000089601.pdf
    • http://idealhca.com/admin/images/file/46130114437.pdf
    • https://coebmsf.com/userfiles/file/nevaxarupebasukesomafe.pdf
    • http://kelvista.lt/images/files/97826452124.pdf
    • http://hamyarsanatco.com/ckfinder/userfiles/files/61556908443.pdf
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/vcoljpf8nfuvfvr81rpvicq88m/ketajijibe.pdf
    • https://nestaerospace.com/uploads/file/9344674502.pdf
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160cc3b36af78a---62064999330.pdf
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609801a0d68c1---98123892889.pdf
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/f0979f0140e7ae98eb35fd7250cf94c5/komogi.pdf
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/9ba40aa6acaa05dc4d0062ad32129f6a/35709327356.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=general+science+answers
    • 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_off000117c9.bin
89e01c2bd62e1b39cf20ab60997fc8ee83ba78e87eaaa71c88daa1bedf86ad78
pdf-font-stream PDF embedded font (sfnt) at offset 0x117C9 10132 bytes
font_01_sfnt_off00012e8f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12E8F 16792 bytes
font_02_sfnt_off000146a1.bin
929517d6b62f0bde3ea7d9e860c73e6f39f61f4e3457d4037a587d1368c84608
pdf-font-stream PDF embedded font (sfnt) at offset 0x146A1 17060 bytes