Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9793a937c93dd9e…

MALICIOUS

PDF

72.9 KB Created: 2021-03-19 06:07:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 2b76758bbc9a1d1a8eb41976b18b3b5f SHA-1: ebbb03066efc98aa73c16a8c4729af9c335eea64 SHA-256: d9793a937c93dd9e1fcf77066441f6680c3e85af45017ef10b3933fb04914232
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, indicating a link farm designed to redirect users. One prominent URL, https://mezovuvuw.ru/strik?utm_term=bodyweight+workout+crossfit, is flagged as unknown reputation, suggesting a potential malicious redirection. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mezovuduw.ru/strik?utm_term=bodyweight+workout+crossfit PDF link annotation
    • https://revoninutilira.weebly.com/uploads/1/3/5/3/135338282/jakavu.pdfIn PDF document text
    • https://rovorakule.weebly.com/uploads/1/3/4/7/134774255/d1737f03eed.pdfIn PDF document text
    • https://faluwesidiji.weebly.com/uploads/1/3/0/7/130738597/sopenevosevewijuda.pdfIn PDF document text
    • http://gutaluri.22web.org/cat_2020_question_paper_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/kijchgo/visolonos.pdfIn PDF document text
    • https://cdn.sqhk.co/duxajoje/ie7jjjd/the_solar_system_formed_around.pdfIn PDF document text
    • http://xagabovano.22web.org/1974150516.pdfIn PDF document text
    • https://guditeni.weebly.com/uploads/1/3/4/5/134529862/kebunigix.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8037887-c0cb-437f-a6f4-4e4f5b17ba41/what_do_angel_number_802_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a7bc519-196c-4921-bda6-6c1cd4df0a17/4984044333.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38f4d7e2-790e-44bb-ad51-6152d3ea2f14/jokobuvo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d57c6a01-b93b-4688-9591-1a1990f5bf12/different_types_of_camera_shots_angles_and_movements.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c34e439-8ef2-45f7-8964-1fdbd1d892ac/98395440653.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6f92e0e-9baf-44b4-9f45-0dea5448127e/how_many_calories_in_an_arbys_beef_n_cheddar_sandwich.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/254e8c07-6197-4383-8fa3-94f49e70280d/maxiwejoperaromewida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e521780f-e577-4ca7-89fc-7c4c74c6ee88/lugusitatovuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8decf0b-419e-49fc-85c5-d00d953770c8/are_chromebooks_good_for_zoom.pdfIn PDF document text
    • http://gorobibo.epizy.com/aspersor_manual_b_g.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bd0d12f-7295-41e7-9d8e-e995ec69584c/17477519795.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82504077-0f02-448d-89d2-e68612f0cfdc/is_elite_appropriate.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_off0000ddff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDFF 5348 bytes
SHA-256: 129e775d678f1966d8b298c0f19db800bf9b7c28e9a7a9d98aa09673c14827f2
font_01_sfnt_off0000f051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF051 10724 bytes
SHA-256: d693df639dbf5e1677ef6d305da6686e5a501af389df13de6ce73a83e7ba9ce6