Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fe5940cdd42920d…

MALICIOUS

PDF

85.8 KB Created: 2021-09-16 06:51:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 8048da94778829cc54187caee384b799 SHA-1: 2005749620bd44d6944c56b6671a569559f235cf SHA-256: 5fe5940cdd42920de2c139b7c13f8626bfd94e7c66930ffd558da3414997d19f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains embedded JavaScript and presents a link farm with numerous external URLs, many hosted on potentially disposable domains or compromised CMS uploads. The embedded JavaScript likely facilitates the redirection to these external sites, which are designed to deceive users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://hoachattn.com/image/files/34786838138.pdf In PDF document text
    • https://printsolutions.printsolutions.bg/uploads/wysiwyg/files/vejemo.pdfIn PDF document text
    • http://cuspsurgeons.com/userfiles/file/37013246233.pdfIn PDF document text
    • https://digireg.es/upload/19617819401.pdfIn PDF document text
    • https://pabxlg.com/userfiles/file/84596347628.pdfIn PDF document text
    • http://avon-bratislava.sk/files/files/14016795059.pdfIn PDF document text
    • http://stadion-zarya.ru/ckfinder/userfiles/files/gisopatuxajesurenezezulo.pdfIn PDF document text
    • https://micsys.in/userfiles/file/74955303255.pdfIn PDF document text
    • https://cmoretv.com/userfiles/fufedagomox.pdfIn PDF document text
    • https://estduquebec.com/scripts/php/xenocode/lib/ckfinder/userfiles/files/jobuxabamulile.pdfIn PDF document text
    • http://a-mega.ua/images/uploads/file/16761265344.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1614193e27d91e---morunegagekofiruz.pdfIn PDF document text
    • http://lica.plovdivweek.com/js/ckfinder/userfiles/files/viraripasuxepoxutub.pdfIn PDF document text
    • https://www.prieur-equipement.com/ckfinder/userfiles/files/tanevezifatafoxoxexolir.pdfIn PDF document text
    • http://vmkmsz.hu/userfiles/file/tatetikizogivudafonigin.pdfIn PDF document text
    • http://babyshelter.net/assets/upload/files/zebebi.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/dbadcab327a3eca3f64ef3849cbfbdc3/luxofafimepuboruvedap.pdfIn PDF document text
    • http://amkchem.com/upload/files/10572816303.pdfIn PDF document text
    • http://cnzhongkui.com/fckeditor/editor/filemanager/connectors/php/uploads/file/120409558650.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/c0d53b5e827b3b8299623df1646fa7b8/susefuramapivagewir.pdfIn PDF document text
    • https://sambelteri.com/contents/files/54849803298.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fd22094ca0---dipavelomewa.pdfIn PDF document text
    • https://superpackeg.com/userfiles/file/92695466798.pdfIn PDF document text
    • http://compagniaviaggi.gattinonimondodivacanze.it/themes/userfiles/files/jenujugabuparewudemuf.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/subuvubawonizevulo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=genshin+impact+mod+apkPDF link annotation
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000131f3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x131F3 16556 bytes
SHA-256: 3d2fc6a184aa049c3cf0522e69bd1b522fbbfe9d039fc3a9ab6791e5e9a3543c
font_00_sfnt_off0000c527.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC527 10764 bytes
SHA-256: 31dbc26a87c837cdb357ef70d627b919aa1b82ff9afee8e71e27e4f1e24ee557
font_01_sfnt_off0000ddcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDCB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f5dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5DD 24904 bytes
SHA-256: aa6034febe004d13e5eb8fa5d3d9b6104300a47864d012cfa8ceb1720ef30b55

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