Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e5d62ed7a1dab43…

MALICIOUS

PDF

81.6 KB Created: 2021-02-21 14:00:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 419013838c7e305dc399af02a30c94eb SHA-1: 9e0c4e631da9f4558e4ab4eac8b861bd704b5bae SHA-256: 3e5d62ed7a1dab438b69886fd09de9e764bfc68425e3e9caade5f44ed7e9b0a3
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one specifically pointing to a Cisco setup keyword, suggesting a lure to a potentially malicious site. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing attempt to redirect users to a compromised or malicious domain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jacksth.ru/wix?keyword=cisco+8742hdc+setup PDF link annotation
    • http://jadurunus.22web.org/altistart_48_catalogue.pdfIn PDF document text
    • https://lexapokugivida.weebly.com/uploads/1/3/1/8/131856754/8b74bb345e9.pdfIn PDF document text
    • https://kowijifeno.weebly.com/uploads/1/3/5/3/135390944/b05e981038f0.pdfIn PDF document text
    • http://shop50off.info/asus_p5qc_bios_updateqbq0r.pdfIn PDF document text
    • http://vidoroxujo.22web.org/target_organic_cotton_crib_sheets.pdfIn PDF document text
    • http://lolafoduluj.22web.org/gajawutarorewadabuzel.pdfIn PDF document text
    • https://sekikeke.weebly.com/uploads/1/3/4/7/134739811/37e6108.pdfIn PDF document text
    • http://rometinanuk.iblogger.org/65393199640.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/electronics_books_in_hindi_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/tanat.pdfIn PDF document text
    • http://konomugafal.epizy.com/guide_michelin_3_toiles_belgique.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/guidelines_hyperthyroidism_ata.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/business_partnership_platform.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/astro_boy_movie_in_telugu.pdfIn PDF document text
    • http://fatapiwav.rf.gd/fallout_4_creation_kit_xbox_one.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/fumenolakuxar.pdfIn PDF document text
    • https://s3.amazonaws.com/redegelesibif/allu_arjun_all_movies_list_songs.pdfIn PDF document text
    • http://fidusolufunenu.rf.gd/cgi_toronto_visa_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/zevexosubufemutuve.pdfIn PDF document text
    • http://bosefijov.epizy.com/chevrolet_aveo_2004_manual.pdfIn PDF document text
    • http://bapibalapu.rf.gd/pujipamalutunalebe.pdfIn 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_off000101fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101FD 5224 bytes
SHA-256: 7e77e3e2ebf5049c161ec8727d58d00cd9764cf5d4dea7f34e6f8a82d8c7bd5b
font_01_sfnt_off000113da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113DA 10824 bytes
SHA-256: 5cd8109a1ad8a2cef40c5d74d6b2c7bfc42e722067565efc6e86a84905cb1fe6

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