Malicious PDF — malware analysis report

Static analysis result for SHA-256 e52467eb48fa3906…

MALICIOUS

PDF

79.7 KB Created: 2021-06-30 04:24:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: ba1e29de7111d0ec568d5f0bc9bab0a2 SHA-1: 7d3c3a70086550b31d3a18946e53498462bca4b0 SHA-256: e52467eb48fa390600145e1dc6b755bde376169d25fba2f498dfa2a069bae5dc
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The embedded JavaScript is a common technique for exploiting PDF vulnerabilities or initiating further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a78bb885f6f---nujitoxexobejetib.pdf In PDF document text
    • http://ansatrans.ru/admin/ckfinder/userfiles/files/39771531324.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/a35kesio075ce06bjfmq0hlek3/basesusurosa.pdfIn PDF document text
    • https://arch.ua/ckfinder/userfiles/files/40583884323.pdfIn PDF document text
    • http://novussiteyonetimi.com/uploads/file/70102075646.pdfIn PDF document text
    • http://jeansresource.com/js/ckfinder/userfiles/files/jowobalikozame.pdfIn PDF document text
    • https://mimpiindah1.com/contents//files/bunasukifilokij.pdfIn PDF document text
    • https://hotelindigha.com/FCKeditor/file/64914264468.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/2962e486418cd9ab5112f763cbb6253b/9202302212.pdfIn PDF document text
    • https://superpart.com/files/40146461931.pdfIn PDF document text
    • https://bd-sokolovska.eu/userfiles/file/kenefaxumebizisanu.pdfIn PDF document text
    • http://strandedtattoo.net/file/16715845910.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab143384d1b---43694971649.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/6389b20843967843643ff437b67e7135/55600202734.pdfIn PDF document text
    • https://evermoral.hk/upload/file/1624965439.pdfIn PDF document text
    • http://100gastro.cz/soubory/files/61948739409.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160743357a5a30---67820337610.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aa345681703---jikijaronekisebutopuleto.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/lokl4fk0oqc693g43hfbjr9pe7/10490585289.pdfIn PDF document text
    • http://rotterdampools.com/contents//files/38248974668.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/adc37b67830c3625fe20fc97ffdbfab4/63495605419.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/dce1f484f0935fbf5a0256f421a09ae4/10005131584.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=new+oxford+modern+english+book+4+3rd+edition+pdf+free+downloadPDF 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_off0000d28f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD28F 16732 bytes
SHA-256: 527ec04a6f8cfd4957728329e7a0a2df249f3b57103616e3921c8105ab5955f7
font_01_sfnt_off0000fdf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011607.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11607 11592 bytes
SHA-256: cd39e5713c662e1ce65e0c5ddaf91ec5f3011fedc1e50a18f2ef87034cee3b9a

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