Malicious PDF — malware analysis report

Static analysis result for SHA-256 6352f001eaf7ea36…

MALICIOUS

PDF

94.8 KB Created: 2021-06-27 23:57:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9e924fe8f98ac01a0def04a28c5e3cb2 SHA-1: 08d4792799ee3227a15a2dd08b19c503000f3e5b SHA-256: 6352f001eaf7ea3624eb1dfa3972a52093596904a35ba75264559f968cdc76db
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of external URIs and the nature of the heuristics indicate a likely phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608008ccb2802---93737420108.pdf
    • http://amadpich.com/userfiles/file/57169062017.pdf
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609b56f65a994---45375632109.pdf
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/310b81a61bbc6dab1f861076b3039548/69318215483.pdf
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/2e0ae871abefa91b189ea0781978636c/81466367028.pdf
    • https://anandamsanyal.com/userfiles/file/kumug.pdf
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/a8e478999bd358fa04ae0c7cd0ad3099/9389669830.pdf
    • http://kasintorn.com/images/upload/files/fijufufamolonapizibix.pdf
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/160acba002f950---fasuvuvobu.pdf
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a096990537e---50583367916.pdf
    • http://www.dean-cpa.com/files/adminpic/file/gamusemif.pdf
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d7efe68ef5---texireluxegepana.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/8acrgv9dnocl9mouajh0bej5t3/rukipudabunu.pdf
    • https://autoprofi.ua/userfiles/file/gikojafip.pdf
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/59e16754c77a8c8b77ffca214a31dfda/43268069765.pdf
    • http://aksaaydinlatma.com/img/editor/image/file/30633116373.pdf
    • https://cleanenergy.mn/uploads/files/32948890540.pdf
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/m7p906ev7vo22fptd40qc9mle4/rivojolesiropudikogiwal.pdf
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160791cfe70722---78134512206.pdf
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9323796be---48363602534.pdf
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/abf265138a495517477e1ec74c34a00c/25491131612.pdf
    • https://albawadiroad.com/userfiles/files/vepimanor.pdf
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160d3079068398---54663026143.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=wedding+in+the+flood+poem+themes
    • 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_off00011216.bin
60984db7088735d0549237c1a0026356dabf1d17802b16d527cd175fff958617
pdf-font-stream PDF embedded font (sfnt) at offset 0x11216 16828 bytes
font_01_sfnt_off00013dd1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13DD1 16792 bytes
font_02_sfnt_off000155e8.bin
6c3a86f2375f3bcdab11388381de02f7570309f7f06785758be5688c0499ef6d
pdf-font-stream PDF embedded font (sfnt) at offset 0x155E8 10676 bytes