Malicious PDF — malware analysis report

Static analysis result for SHA-256 65ca6f8f5a6bc6d6…

MALICIOUS

PDF

83.6 KB Created: 2021-09-13 08:06:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 7cdb46b2744e0716cd5b3b54d8ec22ea SHA-1: 2a4d0fe0165a98f64c425119acb2ff31a911150d SHA-256: 65ca6f8f5a6bc6d613e2576c64d3f4162b77060c8af30eb887835b7d1c1c7c11
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to PDF files hosted on potentially disposable domains, suggesting a link farm or redirection scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of this file being used to distribute malicious content or phish for information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://theartofdesign.nl/ckfinder/userfiles/files/ziwanatavegewomodarugu.pdf In PDF document text
    • http://rajasthanmetals.com/userfiles/file/51809355440.pdfIn PDF document text
    • https://petandpuppies.com/userfiles/file/19101939561.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1612f154203ae6---besafebezujujefidituriro.pdfIn PDF document text
    • http://mywayrtk.org/userfiles/file/wofiramunalopuxinifemel.pdfIn PDF document text
    • https://safetypadlocks.eu/eurostyl/photos/file/toxuz.pdfIn PDF document text
    • http://southerncross-ex.com/images/blog/file/fujajizeworidudibapuban.pdfIn PDF document text
    • https://srinivasagroup.com/ci/userfiles/files/sajitefevedikibexotiju.pdfIn PDF document text
    • https://www.sistemkabin.com/ckfinder/userfiles/files/34164846684.pdfIn PDF document text
    • https://kozmetikadunakeszi.hu/userfiles/file/66626917502.pdfIn PDF document text
    • https://nevisnews.com/userfiles/47040157615.pdfIn PDF document text
    • http://costruzionibulagna.it/userfiles/files/77511980070.pdfIn PDF document text
    • http://szjg.hu/images/file/fibufaxusovun.pdfIn PDF document text
    • http://desiaussies.com/ckeditor/uploads/files/rawivuxenikiripepupom.pdfIn PDF document text
    • https://www.notusweb.com.br/ckeditor/ckfinder/userfiles/files/tezuwawapibenaxumet.pdfIn PDF document text
    • http://gallery4walls.com/upload/editer/file/53830617553.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/9ff673208879d3f19eae76741f3005fc/xobolutatofozejovukekus.pdfIn PDF document text
    • http://minipit.com/data/files/11939197067.pdfIn PDF document text
    • https://fo-prefectures.com/pages/files/27623173121.pdfIn PDF document text
    • http://chataphan.com/file_media/file_image/file/36112759078.pdfIn PDF document text
    • http://www.ujepites.hu/userfiles/files/13970544446.pdfIn PDF document text
    • https://charteriraq.ir/basefile/charteriraqir/files/mosekavovawerupapovojurek.pdfIn PDF document text
    • http://clingac.com/d/files/45355861110.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=best+working+kodi+addons+2021PDF 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_off0000e1ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1EF 17544 bytes
SHA-256: cf31398ed0394410e8a62102806b6e335c5462bb3844b62154b662661524e21c
font_01_sfnt_off00010fbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FBC 10904 bytes
SHA-256: e185191c5ce72a35b2c2d35e7069e8b5431f8af1206174883bc0fa79b4e48247
font_02_sfnt_off00012920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12920 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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