Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e84f32febf6c9fb…

MALICIOUS

PDF

363.2 KB Created: 2021-09-03 20:59:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c9de842057ef23d2291b2aaeee3fc1b9 SHA-1: a2273c0866b184fb08d1226542f6a0e5350aed77 SHA-256: 3e84f32febf6c9fb550cbfd99b6125014dac4bd1db55211e912bb6fa2e4ea00b
126 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress upload storage and other external domains, suggesting an attempt to redirect users to malicious content. The file's structure and embedded URLs indicate it's designed to exploit users by directing them to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9904

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://philabc.ru/uplcv?utm_term=exhortaci%C3%B3n+apostolica+evangelii+gaudium+pdf PDF link annotation
    • http://elite-nails.pl/Upload/file/buzevegowanusu.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1611f68578e649---27107808251.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/u0rtempebo94thjhm00vuakmi8/napivasif.pdfIn PDF document text
    • https://majubesar.net/contents//files/zajodowowofodufupisalumu.pdfIn PDF document text
    • https://teenvolunteerhouston.org/wp-content/plugins/super-forms/uploads/php/files/a3d23aed0d7e06e82adeaced5ba36bd2/49735796140.pdfIn PDF document text
    • https://brianspradlin.com/userfiles/file/58915770610.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16080066714aea---fisezufajovijonakezuxapi.pdfIn PDF document text
    • https://rwd1.thadv.com/upload/files/72368065066.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607909f868c4f---tesenujanijovana.pdfIn PDF document text
    • http://work4shop.cz/userfiles/file/18407431040.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160883fe0a1b3d---winuxiwinu.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610d3784bcb77---70229322522.pdfIn PDF document text
    • http://www.europesolidaire.eu/userfiles/files/redefokofiniresozakusoto.pdfIn PDF document text
    • http://suaups.net/userfiles/file/58342905838.pdfIn PDF document text
    • https://cakenepal.com/userfiles/file/81495281534.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/da6b790580d4adcba071b0544b7c79b0/96491298167.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/161104fbba6ad5---12686414422.pdfIn PDF document text
    • http://hzjksj.com/images/upload/File/19477204410.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16085614036572---94772510831.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/373a4da9dff19ed2fc4b4e967ed1a126/93747626488.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607fce948a0d3---1967404744.pdfIn PDF document text
    • https://citronixdeflection.com/nbloom/fckuploads/file/11896282699.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_off000537b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x537B9 11456 bytes
SHA-256: d5079c19c577f36d34b5388079a8b264be28154be6055996fd25a27140ebba88
font_01_sfnt_off00055231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55231 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00056a43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56A43 19948 bytes
SHA-256: eb14b8c155c687cb97a20a9a5f150fc259c95ec6eeaa885b74a588ae1db356fa