Malicious PDF — malware analysis report

Static analysis result for SHA-256 56f8a5512834cfa5…

MALICIOUS

PDF

75.5 KB Created: 2021-09-06 23:01:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e68e313ea72f6ffd129cdf93bb16b4c6 SHA-1: 2b6d8eab970377f5cdce9a9672d50b35f6c5719d SHA-256: 56f8a5512834cfa5b8a64ddf02822cf90b41b3dc4e4773ec8d6215428c33d9a9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external links, many pointing to compromised or disposable hosting, suggesting it's part of a link farm designed to redirect users to malicious content. The embedded JavaScript likely facilitates the redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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
  • 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 https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/39809a5b29999f0ff1b2d0f5400425ca/90631309587.pdf In PDF document text
    • http://peggylittlelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wudag.pdfIn PDF document text
    • https://strechybenesov.cz/content/dafasefosatojojugepi.pdfIn PDF document text
    • http://voijin.com/userfiles/files/firegisigonujofejivowunef.pdfIn PDF document text
    • https://windsbs.biz/files/file/55067684503.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/14249275998.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/gelawewepomavowis.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed9a634e90---86765429165.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/3699ovqsm19lfhvs4vtpdb0fos/tijotodufesenume.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f80d9f8c2---65355894217.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160773932b5a99---31598689100.pdfIn PDF document text
    • http://asijskepotraviny.cz/files/file/garuwijawenun.pdfIn PDF document text
    • http://burchiellati.com/file_fck/file/wazimijasoxomobonabot.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160e145d48dd3e---zekalepilusolipu.pdfIn PDF document text
    • http://sieuthibongda.net/ckfinder/userfiles/files/73956073890.pdfIn PDF document text
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/wadidujipagudetivovowe.pdfIn PDF document text
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16097ac6e125c1---31993543695.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d93b7d79a4---84796654645.pdfIn PDF document text
    • http://chataphan.com/file_media/file_image/file/bifolakemoxexifipu.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a11f906556---suzerurutagunidoxixofil.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab56789a5e7---desugukusixufifarokiv.pdfIn PDF document text
    • https://boyanbolyarski.com/userfiles/file/43112737470.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=sikora+jazz+harmonielehre+pdfPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c11f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC11F 10856 bytes
SHA-256: 49c6881455fa512c4bf908a909729959d192ea12cdc5f34e908f56e7f2e7b07c
font_01_sfnt_off0000d9ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9EF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF201 17796 bytes
SHA-256: b9d66dcab65301cf2951b17cebdd0933a84e362e9cabfef46e8a66383c4a8e8e

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