Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce5294013a58bb82…

MALICIOUS

PDF

76.3 KB Created: 2021-07-08 11:01:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 40b7f92f24fd83f8483eb6be918f126c SHA-1: cc939ff13c3b14adc32bac5d94eb695b93cc6d06 SHA-256: ce5294013a58bb827119f6bc20504971436076576c6a4c9281d52529784750a4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is a common technique for delivering malicious content. It also contains numerous links to compromised websites, indicating a link farm designed to redirect users to potentially harmful destinations. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/k8ql3k45rm3le3ce151cr90ca3/tilatozebofifu.pdf In PDF document text
    • http://artecgroupservices.com/imagenes/file/kugikevipowafagazejap.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/najevumikajupobe.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/98578673933.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/2ea7f28d05f1055c897773446ef81e61/88543512802.pdfIn PDF document text
    • https://smartcirclegroup.com/userfiles/file/gozalifajemexekibilegivex.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160aa2ea1517e1---24922898450.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/399228d3e50dc4a47031362031a66923/vexiben.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/486326d8a436a55ef28deb1a5cf70309/murodasuze.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/e748f5c50758c52bcca2345eeef339e3/sunosikegalevajepimejutit.pdfIn PDF document text
    • https://ocw.tw/uploads/files/43647333862.pdfIn PDF document text
    • https://spbmworld.com/anaeter_capital/siteadmin/userfiles/files/39554316012.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/743941e28478799b4c21efd55c9cd5ef/71889688780.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607822091734a---patosedunurobis.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/9bd9cf138469ad4de4056e450eeaed4a/werugekixadijixudalido.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/dimawidaxibikix.pdfIn PDF document text
    • http://vbs.pl/dat//file/kowugejixuxubuled.pdfIn PDF document text
    • https://uetty.xyz/js/ckfinder/userfiles/files/dogosipinopezi.pdfIn PDF document text
    • https://bawwabatrizq.com/userfiles/file/tizinafetebop.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/ce1e4caa85e49f84ee4828b957ef0c1c/16272517782.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/d3sdcejf8dg80r5f5jpqebpve6/rowid.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/file/bimoxudu.pdfIn PDF document text
    • https://pristineleather.com/userfiles/file/47575825836.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/98aa5741f105d611bd2f39bf9da96573/15220917847.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=oxford+new+learner%27s+grammar+and+composition+class+3+pdfPDF 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_off0000c4dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dcef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCEF 17080 bytes
SHA-256: 42dfd606cb434b7494c350b9b90cb46d7c4c1240817147123e301a94f3c6dbba
font_02_sfnt_off00010876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10876 11384 bytes
SHA-256: 522efb875e263dc8dc53e24eb499e8980bb76bccebabba7ae9964b98b823504b