Malicious PDF — malware analysis report

Static analysis result for SHA-256 034cfaf420fe321d…

MALICIOUS

PDF

81.9 KB Created: 2021-09-02 20:19:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ea9a1f36fbc6155a8daf73ef871f8e47 SHA-1: ba1f56074d1dba6ae3d75f5d88a1e77e1b9a537e SHA-256: 034cfaf420fe321d7bdcab4c7114085159569cf4659bd0b3896f6c07f9ac61d1
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics strongly suggest this PDF is used to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://irlanc.ru/uplcv?utm_term=intervencion+comunitaria+en+salud+mental+pdf PDF link annotation
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb3d4b50750---sajawisa.pdfIn PDF document text
    • http://sibinetweek.ru/userfiles/file/53777903559.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/jgc33ma0cpnri6si7vbp5tc755/xonufik.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/6d5bb6da704c0df5766e177b4016af9b/nemig.pdfIn PDF document text
    • https://nomaquito-travel.com/editor-images/fobododejagipopigovekog.pdfIn PDF document text
    • http://140.121.161.111/ckfinder/userfiles/files/xusojitisobikokowu.pdfPDF link annotation
    • http://sepremprod.fr/www/images/mediamanager/16137171097.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/160aee0c2e688a---91225929589.pdfIn PDF document text
    • http://projecthouse.bg/uploads/CKfinder/files/tapowuzemoboje.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071b9c9c96d5---85128301065.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/b613b1e19cd075f7907d4faecabfef14/boxinim.pdfIn PDF document text
    • https://arredamentigiacobbe.it/file/41988691640.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/85057555881.pdfIn PDF document text
    • https://butterfly-propertymanagement.com/userfiles/file/88898602093.pdfIn PDF document text
    • http://www.uniformsolutionsforyou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d08b094b67---bofatowarodarinuxinujex.pdfIn PDF document text
    • http://holmeslawfirm-iowa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xipuvilis.pdfIn PDF document text
    • https://vietnaminsight.biz/ckfinder/userfiles/files/zewukukosevoz.pdfIn PDF document text
    • http://wsmr.us/userfiles/file/23528241757.pdfIn PDF document text
    • http://manavpublicschool.org/manav/userfiles/file/wetulivewu.pdfIn PDF document text
    • http://datong-travel.tw/upload/ckeditor/files/20210814142419.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/19270990552.pdfIn PDF document text
    • https://visionbrindes.com/admin/fckeditor/userfiles/file/68030955128.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/cf0cf37938c5308130ab93999e5f952c/monukujufirolirigovemonor.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8ed861eba---faxunakebuxasivig.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_off0000dc98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC98 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f4af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AF 10896 bytes
SHA-256: edd5a3bfde8a7bf208dc68373c2711ed4b2adf66c523ee0d44f249f336a71e48
font_02_sfnt_off00010de6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE6 17280 bytes
SHA-256: cae726a4b20ad8854edd925582831a5354ec461b4d8a5b089c6c97ea5074585a

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