Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a2c26de18fa5a13…

MALICIOUS

PDF

76.0 KB Created: 2021-06-22 14:27:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 37ee83527d2a325da067f93bc8b0b80c SHA-1: 89b5473d13dcbcbc2c058560b1f6f4ba220d9b40 SHA-256: 6a2c26de18fa5a131066abfcc877e092717d3eab5038664e3cfc8a3528d1d824
156 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to numerous compromised websites and disposable hosting domains, likely to distribute further malware or conduct phishing operations. The embedded URLs and the document's deceptive title suggest a social engineering tactic to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://laborke.ru/uplcv?utm_term=how+to+cite+online+article+without+author+apa
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc27f079cb---4426072610.pdf
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/44c8nco2vm49pe0jvugffh35jg/73349525772.pdf
    • http://onnetsolution.in/userfiles/file/gavuvegaxapenulaviputa.pdf
    • https://thehideawayresortpattaya.com/userfiles/files/8064297306.pdf
    • http://www.scsi.coop/wp-content/plugins/super-forms/uploads/php/files/753b6b3a9ccb1427c9b7ad44556ecec9/9659902073.pdf
    • https://amatnieks.lv/pictures/image/84033608228.pdf
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160be094079bdc---rimabatonu.pdf
    • http://0-50.ru/userfiles/file/timilivogidafo.pdf
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/57978477ce313a1e8b0191e4d29e6da4/62452611915.pdf
    • http://eiak.org/upload/editor/files/52753064379.pdf
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca303ae94a---buwotikukikulena.pdf
    • http://www.electricman.in/demo/frontend/web/uploads/files/xoragixobi.pdf
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/70jclb4sc1f844l4cuh8dvbbd2/kejakezumiz.pdf
    • http://starlightcelebrates.ca/clients/4/43/43e9139217482d7666ce300faf566241/File/80023156460.pdf
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/92eec26c4226f52a18c70257753ae6d6/ratavizol.pdf
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/16075d300dcf62---lapodaviwuzeli.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608ff1beb058b---jujidivipose.pdf
    • http://bright-mineral.com/uploadfile/file/2021052804032883.pdf
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/nma0fnhpomuethb2q48rjljkak/43509809913.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160819ec746616---sovememujinab.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_off0000ec8b.bin
9272641eaa4d58464738989a2d572d19bd077c643e10b874a9b6047e3373dede
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8B 4896 bytes
font_01_sfnt_off0000fd3b.bin
c6a69dd03f29f0c022d5bb95d26c3e29e0c20cd2aab5bb083b706248483e0922
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD3B 10844 bytes