Malicious PDF — malware analysis report

Static analysis result for SHA-256 05101588cd429165…

MALICIOUS

PDF

82.7 KB Created: 2021-03-29 17:36:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 796e5274cb32e419ede8169cc19ce79a SHA-1: df9ada601b1a5dfd0b7fae310d4142ba8ec589b9 SHA-256: 05101588cd429165b5192599aa21fa9400b56aa27c1783543d699ab49ceb0277
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File T1059.007 JavaScript

The PDF document exhibits characteristics of a phishing lure, specifically prompting the user to install a browser extension or update to view content. This is supported by the 'SE_BROWSER_INSTALL_LURE' heuristic and the presence of multiple external URLs, one of which is associated with a link farm. The ML classifier and ClamAV detection further indicate malicious intent, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://resalured.ru/strik?utm_term=how+to+become+it+auditor+certified PDF link annotation
    • http://menetufebev.22web.org/chloroform_for_sale_australia.pdfIn PDF document text
    • https://cdn.sqhk.co/lejesapazud/gWKhjLk/zefirulopaxosonuxulanigam.pdfIn PDF document text
    • http://takodevizol.iblogger.org/prime_mathematics_3a.pdfIn PDF document text
    • https://cdn.sqhk.co/savekedeg/cMid7hf/kingfield_school_woking_ofsted_report.pdfIn PDF document text
    • http://kuxolelajoror.iblogger.org/sijunelitu.pdfIn PDF document text
    • https://cdn.sqhk.co/wimiwupo/Wjaighf/dragonvale_cooperative_breeding_cave.pdfIn PDF document text
    • http://jodopafipunew.22web.org/wunurujekotelozitu.pdfIn PDF document text
    • https://cdn.sqhk.co/givifevulo/LLieghz/rolling_stones_tongue_sweatshirt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://83d12552-0bc1-4415-b221-1da25caacb9b.filesusr.com/ugd/1e11d0_3854495240bc46d6b73687e4a17bee34.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b160d91b-0906-4bcf-995e-b207d0f6e733/forgotten_realms_history_5th_edition.pdfIn PDF document text
    • http://feriwodopumumo.rf.gd/guided_reading_books_level_a.pdfIn PDF document text
    • http://lofufizopugopo.rf.gd/remnant_from_the_ashes_mangler_guide.pdfIn PDF document text
    • https://4adff18d-dc39-4349-be2c-eeb12737f1cb.filesusr.com/ugd/9117e0_fa3b40d7306a46a1a325d435e064e0d9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dexodekelaseki/95998301437.pdfIn PDF document text
    • https://1350f94c-8d6f-42b4-8351-24983ad6a49a.filesusr.com/ugd/4aae87_54422733442e4a60bd6f47bfc5076332.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zonivezada/story_saver_plus_for_instagram_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13a8519e-1324-4ec5-b892-d8ba5661a9c0/toyota_corolla_xli_2016_price_in_pakistan_olx.pdfIn PDF document text
    • https://e301b21f-f707-426c-a094-6199d4b1a2d6.filesusr.com/ugd/f65518_82620561b7934399a4f7603490cb8552.pdf?index=trueIn PDF document text
    • http://juvisupejigu.epizy.com/malcolm_baldrige_criteria_for_performance_excellence.pdfIn PDF document text
    • https://e510c2d5-567e-4a96-89ff-abc18316baf7.filesusr.com/ugd/8a9bcc_b9338415bae042a399c353b5fcdfa045.pdf?index=trueIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001063b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1063B 5152 bytes
SHA-256: f832dfeea48bf5461764117fd8ed17bbc074fb49819d62ab76e64a94d5dd8422
font_01_sfnt_off000117b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117B7 11124 bytes
SHA-256: 1a03405d7e895e0d44b2c3d18113a9e5b754cf5e71a02e4d00d375426265755e

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