Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c285ef3d142f4de…

MALICIOUS

PDF

73.4 KB Created: 2021-03-17 01:20:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: e315ef3b13ce59f3662f582507ce1506 SHA-1: abf930547b6ff3a335c80338a8297efc6aa5118e SHA-256: 9c285ef3d142f4dee2c6f0bfe634bc5b3219458583b1385150583fdc0ab5780b
64 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a high-confidence ML classifier flagging it as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for numerous links, suggesting a spam or phishing campaign. The document body, though heavily obfuscated, contains keywords related to downloads, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9662

Heuristics 3

  • 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
  • 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://baarspo.ru/award?keyword=wonky+donkey+book+pdf+free PDF link annotation
    • https://cdn.sqhk.co/gubisagebuto/vDggU0w/scary_ice_scream_scary_neighborhood_creamer.pdfIn PDF document text
    • https://cdn.sqhk.co/temegolu/gfgdhap/pafawujep.pdfIn PDF document text
    • http://tifizutolakefu.22web.org/zudun.pdfIn PDF document text
    • https://nuvisinuxaxo.weebly.com/uploads/1/3/1/3/131383681/ziwekov_jonigitenes_gedonezasebavi.pdfIn PDF document text
    • https://cdn.sqhk.co/fojevimexu/jggBjd4/pop_time_popcorn_spicy_jalapeno.pdfIn PDF document text
    • https://vitovoraf.weebly.com/uploads/1/3/1/1/131164311/cb8893509766ce.pdfIn PDF document text
    • https://dupizonax.weebly.com/uploads/1/3/1/3/131380343/bavizukitarazanu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jomewudixaf.epizy.com/frm_part_2_sample_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/jevuxug.pdfIn PDF document text
    • http://vibesevazetiv.rf.gd/manager_are_born_or_made.pdfIn PDF document text
    • https://d5bea983-5bca-41ba-aae6-6b688785cc77.filesusr.com/ugd/9ec29b_0f004fbe4b654b8888f68b978cc63fee.pdf?index=trueIn PDF document text
    • http://wuvoxebegef.rf.gd/reading_and_writing_curriculum_guide.pdfIn PDF document text
    • http://fikuputo.epizy.com/jafujuzegu.pdfIn PDF document text
    • http://fibejebovef.epizy.com/artist_management_books.pdfIn PDF document text
    • http://dimegebewode.epizy.com/deganadugotupovorejijema.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/vaxizu.pdfIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/ethiopian_airlines_crash_preliminary_report.pdfIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/98360306646.pdfIn PDF document text
    • https://fa53e508-d88d-41cb-897c-7a5b6f1bfcc3.filesusr.com/ugd/361045_fb8fabd6d2504ae7ac82a48228776d19.pdf?index=trueIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10759 4932 bytes
SHA-256: 63eecb110d77f13512c211064dce307ab74fef9f63ae4d44d888848fadfa2e8d