Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9182be504e1e4e5…

MALICIOUS

PDF

85.2 KB Created: 2021-06-26 08:56:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0b055f5ca1843adacbea6a824192e636 SHA-1: d8fa04f9578833a35e85a4656efc4d9c9d3072a1 SHA-256: d9182be504e1e4e5764e65381c5d70cd8c34ac03784de20bf08fb634027dc270
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple domains, many of which are hosted on compromised CMS platforms. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, and the document body was unreadable, but the URL structure and heuristic firings are sufficient to assess the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/e96c4082264a9d62852711cf47150ce9/3282407104.pdf
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/160861ddce06c4---tufuvime.pdf
    • http://cloverpark1959.com/clients/51168/File/34474076961.pdf
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160acf15311579---78870517456.pdf
    • https://www.nexidia.it/wp-content/plugins/super-forms/uploads/php/files/589ba03fed7be4196433bc75632ca95c/46580169919.pdf
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca34390eab---mapizej.pdf
    • https://kogan-photo.ru/wp-content/plugins/super-forms/uploads/php/files/7de8d1904f4ccb37387a5e912ba6c5e7/xunegexoxijisajek.pdf
    • https://larustt.com/upload/ckfinder/files/92411504606.pdf
    • http://axwelindia.com/uploads/80578041072.pdf
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a761cb79bb7---6763463282.pdf
    • http://amctop.com/board_data/editor_img/file/202105191638.pdf
    • https://viboot.com/ckfinder/userfiles/files/13876257683.pdf
    • http://metrocars.london/survey/userfiles/files/47264301874.pdf
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d43bb56e16---somajona.pdf
    • https://grandhotelbulgaria.com/userfiles/file/korojux.pdf
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/e872627785cc73acfc9dd754a956b43b/wokiperedajitorobuk.pdf
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/2aolmr777q3u96emosmo5j1kd6/2664104130.pdf
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608970902a18a---64857597003.pdf
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/4d97b62258a05ba61431440c150f5003/57440889338.pdf
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/763a9ea5137c435ad0316fdc01cc58c1/5816871621.pdf
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160806f3a412bd---reloxapizewiroviti.pdf
    • http://dochoiotovn.com/uploads/userfiles/file/89479938522.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=visual+arts+meaning
    • 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_off0000eb49.bin
b58f2ba6e397c1a0148a3719f58dd5be5a680345f65a0a1afdc1e133e15b77bd
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB49 10400 bytes
font_01_sfnt_off000102d1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x102D1 16792 bytes
font_02_sfnt_off00011ae3.bin
e22e79a73749b2a9d93a42b2667fa706084a465569787fabf3362d4c361fbf29
pdf-font-stream PDF embedded font (sfnt) at offset 0x11AE3 17176 bytes