Malicious PDF — malware analysis report

Static analysis result for SHA-256 544450cbcbe65d36…

MALICIOUS

PDF

81.2 KB Created: 2021-09-23 04:28:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 01c701a970526e4c909e01c83712143a SHA-1: 5a6f992d8b7bbce3c5232290fe726fc1a495125b SHA-256: 544450cbcbe65d36d2a32bab04645b4c7b57999c8a7a507dcd8341d535201681
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external links, many pointing to compromised CMS upload directories or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://allytemp.ru/uplcv?utm_term=hdo+box+app+android PDF link annotation
    • https://akproauto.com/nbloom/fckuploads/file/83143597141.pdfIn PDF document text
    • http://1qjd.com/upload/files/2021-09-08-10-37-32-z33T6mnV.pdfIn PDF document text
    • https://qkon.ca/images/file/wujimemorulawajota.pdfIn PDF document text
    • http://pyroglobal.sk/app/webroot/files/userfiles/files/54390190301.pdfIn PDF document text
    • https://lawrenceyezersky.com/userfiles/file/jifadedogejenegedamiz.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613ed2137173e---xekuvoxukejunijosujigoweb.pdfIn PDF document text
    • http://ropesadventure.com/d/files/70860340652.pdfIn PDF document text
    • http://naitikfashions.com/ckfinder/userfiles/files/96122733451.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/c4c407fc71bc6ae589eac7e7826b08dc/68290324772.pdfIn PDF document text
    • http://polenes.cl/userfiles/file/naxexakafe.pdfIn PDF document text
    • https://maria-galland.ru/files/file/popoxeguduz.pdfIn PDF document text
    • http://konemara.hu/userfiles/file/9929314458.pdfIn PDF document text
    • https://rafaela-motores.com/userfiles/file/72658353068.pdfIn PDF document text
    • http://dmychadla.eu/UserFiles/File/19821027173.pdfIn PDF document text
    • https://yensaovinastar.com/media/files/40741223444.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c1c9e1bcbf---putuvuwarek.pdfIn PDF document text
    • http://pro-group.ru/userfiles/file/wosokesavagudit.pdfIn PDF document text
    • http://www.anapharmata.hu/ckfinder/core/connector/php/files/45109475559.pdfIn PDF document text
    • https://zevkotodoseme.com/upload/ckfinder/files/14555862665.pdfIn PDF document text
    • https://tierlistei.ch/downloads/repisenuli.pdfIn PDF document text
    • http://avvocato-callegaro.it/public/file/6130719403.pdfIn PDF document text
    • http://jenan.com/ckfinder/userfiles/files/kuzusifemoma.pdfIn PDF document text
    • http://mybed.tw/uploads/files/202109201743543005.pdfIn PDF document text
    • http://egyptlance.com/userfiles/file/narulebowuxiwerolexef.pdfIn PDF document text
    • https://www.assofmt.org/ckfinder/userfiles/files/fovemovelomugivarus.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_off0000da69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF280 10176 bytes
SHA-256: dc5b99c76e73149f768c6c8ca140c6ab0ded6516c55306c02cbf17fba3437744
font_02_sfnt_off00010901.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10901 17820 bytes
SHA-256: 7247768df3b88fb2bf906fe6f4b1829ebfe7187c583d804f78679795b6b84467

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