Malicious PDF — malware analysis report

Static analysis result for SHA-256 d88dcf5e884cbe7d…

MALICIOUS

PDF

70.5 KB Created: 2021-10-01 01:23:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: cbef9d7d7fff2bf8ed7db2600581071a SHA-1: 4ed8371c3657bc7e82fece263adcca27e9de6795 SHA-256: d88dcf5e884cbe7dc3cfa96179e98cc237bd94e342276a24dfdbfe34504c7e2e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external URIs and links to compromised or disposable hosting, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are typical of malicious PDFs designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://oniceh.ru/uplcv?utm_term=wizard+luinor+l5+qr+code PDF link annotation
    • http://tinhdauvietnam.vn/upload/files/forimefuroluja.pdfIn PDF document text
    • http://vinhosnorte.com/images/files/22895440908.pdfIn PDF document text
    • https://lesartsdansmonjardin.com/userfiles/file/20210917192711.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/1e063b6c09b6ec1348191a456ce46a62/18249678198.pdfIn PDF document text
    • http://anninh247.info/upload/files/6746470833.pdfIn PDF document text
    • http://flyingfish-stay.com/userfiles/file/nevene.pdfIn PDF document text
    • https://tort-art.ru/userfiles/file/60911835370.pdfIn PDF document text
    • https://nezamirekhaseafoods.com/userfiles/file/suvekirodokogatimof.pdfIn PDF document text
    • http://www.dkmodels.net/ckfinder/userfiles/files/jisitukedilaselab.pdfIn PDF document text
    • http://ipmarketing.net/FCKeditor/editor/filemanager/connectors/userfiles/file/55292429521.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613d946d68f43---sofupokolen.pdfIn PDF document text
    • https://aldapa.eus/files/galeria/files/getatosetixatuxizorek.pdfIn PDF document text
    • http://www.hebrewforreadingcomprehension.com/content/vubojezegaxiwapatub.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137987f87591---relirigafemetojarogenuwis.pdfIn PDF document text
    • http://irths.com/upload_files/files/mugigivewobuselopa.pdfIn PDF document text
    • http://bodegaadrover.com/userfiles/imagenes/sunuzusakemaf.pdfIn PDF document text
    • http://xinyuemu.net/assets/202109/files/20210907115931918514.pdfIn PDF document text
    • https://jeanmarcrobion.fr/userfiles/file/49421456614.pdfIn PDF document text
    • https://ecohort.com/userfiles/files/43336071515.pdfIn PDF document text
    • http://eatatrudy.com/uploads/files/98561325725.pdfIn PDF document text
    • http://didopack.com/files/piwes.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/fonad.pdfIn PDF document text
    • http://spodne-pradlo-2bpoint.sk/UserFiles/File/vajoroxexa.pdfIn PDF document text
    • https://tlproduct.com/userfiles/file/52004322362.pdfIn PDF document text
    • http://edallyshop.com/upload/files/84456503322.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_off0000b38f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB38F 10532 bytes
SHA-256: e05917afbb0e397632bcac5607a92181f33527c7160d69601708437beab1e8ed
font_01_sfnt_off0000cb7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB7C 15576 bytes
SHA-256: 479d88cb489b5ace82fa4fc5d67c9c577fbe9cabc3299e22aa384b9f48d99dca
font_02_sfnt_off0000f2ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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