Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce93b24c95ad15c6…

MALICIOUS

PDF

81.7 KB Created: 2021-09-16 10:22:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 16ed3228cc121856c7e88e9b88a2f806 SHA-1: f14d970a52eb5fc828fb83913df9ac34b5a15963 SHA-256: ce93b24c95ad15c69e46224a58d51ca81676d469a4c97fcc5a7995fd3e3e3e30
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs pointing to compromised websites, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious lure designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://huntic.ru/uplcv?utm_term=live+cricket+app+free PDF link annotation
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/69191a447c6e21a99e7ee6a6d8e7c1b7/goserituzox.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/ei3rn3hcqk7t45mk8n5k0e0rqe/rejawemaverutebab.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16137cfbc4826f---36514017190.pdfIn PDF document text
    • http://bajkolandia-leszno.pl/userfiles/file/bofirowowizofufulapok.pdfIn PDF document text
    • http://thermcom.cz/userfiles/file/feburuxadojaxami.pdfIn PDF document text
    • http://ecole.ru/text/images/file/vasapumiromajititubodobu.pdfIn PDF document text
    • http://fuku-zou.com/userfiles/file/2156188788.pdfIn PDF document text
    • http://pzhjintai.com/upload/files/69122718674.pdfIn PDF document text
    • http://cualuoiskydoor.com/webroot/img/files/luralepuruguxabe.pdfIn PDF document text
    • https://perfecthospital.net/FCKeditor/file/duxogalanenaludogukafano.pdfIn PDF document text
    • http://dkmmotor.com/files/userfiles/file/82017234987.pdfIn PDF document text
    • https://biroestarsa.hu/uploads/file/xijuxogefelafil.pdfIn PDF document text
    • https://syntellect.ru/Repository/file/kulesa.pdfIn PDF document text
    • https://freshchannels.com/home/sites/freshchannels/public_html/ckfinder/userfiles/files/42334646376.pdfIn PDF document text
    • http://www.w.radeton.cz/ckfinder/userfiles/files/3302223175.pdfIn PDF document text
    • http://jingyitech.com/uploadfile/85776901770.pdfIn PDF document text
    • http://merrygoldholidays.com/ckfinder/userfiles/files/26312025479.pdfIn PDF document text
    • http://pekingtogo.com/uploads/files/34366337980.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613649e65770c---bubusetiwibexuvezanu.pdfIn PDF document text
    • http://www.serge-valentin.net/ckfinder/userfiles/files/20982039671.pdfIn PDF document text
    • http://3e-machinery.ru/app/webroot/filesfiles/nibeviwelilonuzunolaj.pdfIn PDF document text
    • http://alessandrobelleseveterinario.eu/userfiles/files/muritegifem.pdfIn PDF document text
    • http://narcisse.sk/editor_uploads/files/zewinewelusozikidevovotuw.pdfIn 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_off0000de6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE6E 10148 bytes
SHA-256: 28d21af440b56127573654129cd9a2e5d3ae035e03856f97855ee02cba16c7c4
font_01_sfnt_off0000f553.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF553 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010d65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D65 17320 bytes
SHA-256: f84657a48ec0dd8eca7a840a084361f00c9cc67a686ff8e76e8492332da08942

Open this report in the interactive analyzer, or submit your own file for analysis.