Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a46ae20bff9ecf8…

MALICIOUS

PDF

101.8 KB Created: 2021-07-29 15:41:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 603d757bcccc9768f67d7c484daf45e7 SHA-1: 344b215f21acb8fd9cea53f501ad3c9df8975496 SHA-256: 2a46ae20bff9ecf8f32a567ebeb495586e5ca565344a3ead0f612577e61f32d9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple links pointing to compromised WordPress upload directories, suggesting an attempt to host and distribute malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of embedded JavaScript (T1059.007) further supports the malicious nature of the document, potentially used to initiate downloads or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9504ea127---sotakozide.pdf In PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082c9cf2ef63---sosolelizoni.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607eee265322c---48212671317.pdfIn PDF document text
    • http://fcv-bo.org/data/fcv-bo/userfiles/file/35726136021.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c54164510a5---pipuwapetuximuxakopefoxo.pdfIn PDF document text
    • http://willismctyeire.com/clients/c/cd/cd1fd5262213d36872a77bd42df049b7/File/fegivadufatir.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607c4b04abab7---vubixum.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a117101aa38---kinekazawupedogexuzexu.pdfIn PDF document text
    • http://bartuceviri.com/userfiles/file/panozirenuvepotex.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ed2069a934---23910334222.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210719092655.pdfIn PDF document text
    • http://debschoen.com/userfiles/file/75351540723.pdfIn PDF document text
    • http://jingluo.net/uploadfiles/files/50291791466.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/6mdabaib379rlkun7aoa7dhk2f/31475639037.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/160742195c2424---19467856735.pdfIn PDF document text
    • https://brothers-music.com/ckfinder/userfiles/files/rowufika.pdfIn PDF document text
    • http://kantoromega.pl/userfiles/file/22969168006.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acbaa8964c2---semalemidapurawitebeko.pdfIn PDF document text
    • http://accu-chek-event.com/ckupload/files/luxoredelepawepot.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/72132301738.pdfIn PDF document text
    • https://i-chat.tw/js/ckfinder/userfiles/files/75950337304.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/tufemumowona.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=download+bloody+roar+4+ppsspp+ukuran+kecilPDF link annotation
    • http://www.taringa.net/In PDF document text
    • 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_off000127fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127FE 11020 bytes
SHA-256: 82529252c57aa1c5a773cbe848889bab21d9fb384c989bc4ce8eed5f4c1f8741
font_01_sfnt_off00014196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14196 17604 bytes
SHA-256: 05f7a1bb367617dfd998a21556b263449d3ab637d50cd98f785dff28aeae09a0
font_02_sfnt_off00017000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17000 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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