Malicious PDF — malware analysis report

Static analysis result for SHA-256 e796054429abc9cd…

MALICIOUS

PDF

71.3 KB Created: 2021-09-07 00:38:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 410e8bf22b456c655f51c77bfa7b0807 SHA-1: e944010ae32aca454faf3bd9d76e856f071e13f6 SHA-256: e796054429abc9cdf160faf62473e66b8b30c4eb4ba29e76737437d4f278140d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites hosting other PDF files, suggesting a link farm or redirection mechanism. The presence of embedded URLs and the nature of the heuristics indicate an attempt to direct users to malicious or compromised external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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.
  • 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://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d8c58a75635---tuburonebun.pdf In PDF document text
    • http://freeski.hu/freeski/file/84514328334.pdfIn PDF document text
    • http://www.nbc.com.vn/ckfinder/userfiles/files/nenew.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/fa2517166e27ce116027ba960081d21a/99535816386.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d711513688---77665377394.pdfIn PDF document text
    • https://peterdegendt.be/file/52685737424.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/n72snt4n6l6cau4pljs1uuqs4t/lalokexizakuweki.pdfIn PDF document text
    • https://paroles-vives.com/ckfinder/userfiles/files/pabisawuwatuge.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/fapezazudowodu.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160acf6204d40c---8518123798.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9fc219cd28---senegefirada.pdfIn PDF document text
    • https://menu2uplus.com/images/file/lujekidunuvetupib.pdfIn PDF document text
    • http://ipceurope.eu/assets/file/41757924171.pdfIn PDF document text
    • https://vinocastillo.hu/editor_up/87575231867.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608da24010e21---nafabizuni.pdfIn PDF document text
    • https://j-kowalewski.pl/uploads/userfiles/files/panufunewaniged.pdfIn PDF document text
    • https://betenenergy.com/sites/default/files/file/rorapapesifujekiwerabad.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/dhtfl42i6tv76hadi53eonpali/30949656244.pdfIn PDF document text
    • http://xn--80aikni6a0b.xn--p1ai/images/file/gonudovaj.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090ef81b4e5f---45892529322.pdfIn PDF document text
    • http://centroolosprato.it/userfiles/files/44049047140.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609fc336e80aa---64582445976.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160785ca166318---79300673052.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=adjectives+exercises+for+grade+5+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_off0000b67f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB67F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ce91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE91 15616 bytes
SHA-256: 6da4a114df6e369068c9ca87adb1018bf1dd89043559b990a58f1107e1d2aa6b
font_02_sfnt_off0000f633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF633 11056 bytes
SHA-256: c292698550458b6c51ecc8c3c52dd9f8ac739a1260fee8ba4b40091c3d6a8cd5

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