Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e832d8937ae1bc1…

MALICIOUS

PDF

207.0 KB Created: 2021-08-07 21:42:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: cd8726ff966e4a2778a6267b18cecc30 SHA-1: aa57305ce380c824129d42046163c376c7101d91 SHA-256: 5e832d8937ae1bc12af689903f59b6153719c43681dac6ec2bbe17bafb87be49
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs, with a high-confidence heuristic identifying links pointing to compromised WordPress upload storage. This suggests the document is designed to redirect users to malicious sites, likely for phishing or to download further malware. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9809

Heuristics 5

  • 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.
  • 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://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/9u826hbo98shj1qoudgnnv4ipf/sebopasaxibaxutirogiwawat.pdf In PDF document text
    • https://eliteplacementagency.com/uploads/files/93712070402.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/gabipide.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aff31e984b9---66944639230.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/16100e3712e73b---wedidupelemazano.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/07b56981c894a49b1b172bd964d72a43/18128590026.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609624aa1d678---58449266044.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d2623d701---68162792037.pdfIn PDF document text
    • http://nsfeed.com/_UploadFile/Images/file/36229187140.pdfIn PDF document text
    • https://soalmatematik.com/userfiles/file/98811267593.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ccc4f062c8b---visavomukelelukabuwufos.pdfIn PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/dunivusanidedax.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/7a3b96a6e634ee7416a4c77f031b4a11/749251727.pdfIn PDF document text
    • https://dancleland.com/img/upload/file/jafinok.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160834f0c78ed2---84489265182.pdfIn PDF document text
    • http://pnmanagementsolutions.in/uploads/63446565320.pdfIn PDF document text
    • http://fbchitchcock.org/clients/8/8b/8bdff38a390027835eb24981312b950c/File/lifib.pdfIn PDF document text
    • https://balajihighfields.in/userfiles/file/moxugufitep.pdfIn PDF document text
    • http://hotstamping.pl/files/file/rigibor.pdfIn PDF document text
    • https://betenagro.com/sites/default/files/file/jarererel.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/161024f4d19a95---15825194353.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/348ab4f94ad5def7c86b00b204ff067b/6921059870.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=who+was+cesar+chavez+and+what+did+he+doPDF 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_off0002c80e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C80E 19504 bytes
SHA-256: ee322314448c46d6939483dbb413dbc11c2e9f1a4965bdaed726a7251a56eb90
font_01_sfnt_off0002faa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FAA9 10624 bytes
SHA-256: 6fc06671ac85d9bfe33f7feab3ee264c6871fa4e6c6e3f662ea99ebd0de0685f
font_02_sfnt_off00031310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31310 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1