Malicious PDF — malware analysis report

Static analysis result for SHA-256 9be43d6ca9350f05…

MALICIOUS

PDF

70.2 KB Created: 2021-03-24 06:50:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 8be8abe0ad375ccfeb8bf75ba0e52895 SHA-1: f20ccf6e7fe9731298d85b1cac9e413d97f601c1 SHA-256: 9be43d6ca9350f0502234b5d941086e1e56bff9d17e7a73d4c64093d9f6be048
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains a large number of external links, many pointing to disposable domains and Weebly-hosted files, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to distribute further malware or phishing content. While no scripts were explicitly extracted, the nature of the links and the PDF structure suggest it could be used to exploit vulnerabilities or redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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://xezojetit.ru/strik?utm_term=panorama+del+nuevo+testamento+pdf+paul PDF link annotation
    • https://vomoxolakixirum.weebly.com/uploads/1/3/1/4/131438067/jojewawujo.pdfIn PDF document text
    • http://potolkilife.ru/dpwh_school_building_plansnxpbs.pdfIn PDF document text
    • https://xesufomoma.weebly.com/uploads/1/3/1/0/131070197/0b55ec57756e.pdfIn PDF document text
    • http://bu-markett.com/80597282195npkos.pdfIn PDF document text
    • https://degevibuv.weebly.com/uploads/1/3/5/3/135316410/88efccbf.pdfIn PDF document text
    • http://bcipreactivaperu.com/kigamizalotk7u.pdfIn PDF document text
    • http://rivalo130.com/what_is_unity_photographytuks4.pdfIn PDF document text
    • http://lomirefuw.iblogger.org/how_do_i_clear_the_error_code_on_my_hp_printer.pdfIn PDF document text
    • https://mupoveno.weebly.com/uploads/1/3/4/3/134371030/43ba673c93974.pdfIn PDF document text
    • http://select-get.top/cube_escape_paradox_clock_chapter_1lram2.pdfIn PDF document text
    • http://zarabatyivat.ru/amedd_army_mil_file_publich4hde.pdfIn PDF document text
    • http://gufutaca3.xyz/receptive_expressive_emergent_language_scaleclhwq.pdfIn PDF document text
    • https://domazatavaxagit.weebly.com/uploads/1/3/0/7/130775902/5c892671600.pdfIn PDF document text
    • http://shoop-fo.ru/anycast_wireless_display_user_manualjb39f.pdfIn PDF document text
    • https://cdn.sqhk.co/ludozenidi/UibWicY/qr_barcode_reader_free.pdfIn PDF document text
    • https://cdn.sqhk.co/zurajekiviw/hhhape1/bingo_wholesale_monsey_phone_number.pdfIn PDF document text
    • http://rutonujak.iblogger.org/lonukagosejagelakepa.pdfIn PDF document text
    • https://cdn.sqhk.co/lobinazema/ahcge7i/wokugifi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6d4cd3b7-91e9-43ac-92b9-205473f1e50d.filesusr.com/ugd/28146e_9999244044c449dbb81b46329115d690.pdf?index=trueIn PDF document text
    • http://toxukagaxopud.epizy.com/17213439458.pdfIn PDF document text
    • https://4adff18d-dc39-4349-be2c-eeb12737f1cb.filesusr.com/ugd/9117e0_dcbbe74e60d04fe98a7be70427206e89.pdf?index=trueIn PDF document text
    • https://cf336f9a-6a79-4542-9269-5b62d6eb69dd.filesusr.com/ugd/1daf83_d4406055e1bc43afb8ddec5c91f8f98c.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_off0000d53a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD53A 5248 bytes
SHA-256: 75b44fa6ab7ed4d392be5daea822f80be5d818fa3e40ff3763e8ae3f0345d7e3
font_01_sfnt_off0000e703.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE703 11060 bytes
SHA-256: 8eda2a93889a7a7e4f80af4372fa4bd1ea7cb41f1b87df4bbf2db6d3d2a3b4e7