Malicious PDF — malware analysis report

Static analysis result for SHA-256 465e5bf852c75a5d…

MALICIOUS

PDF

87.0 KB Created: 2021-03-18 06:47:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 866e52b00ed0c064657fdca3d537c5f3 SHA-1: 58f758d82f76c36b5342bb5ada5c0b0c5c9ef658 SHA-256: 465e5bf852c75a5de39243837fa40e3e8c3756ce4fbf3d305d80a716b0f17b78
126 Risk Score

Malware Insights

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

The sample is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it's a link farm on disposable hosting. The PDF contains numerous embedded URLs, with one prominent URL pointing to a domain associated with malicious activity. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest it's designed to redirect users to potentially harmful content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

Heuristics 5

  • 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 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://vilenefex.ru/strik?utm_term=section+138+of+negotiable+instrument+act+in+hindi PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446491/normal_5fd2a244429e2.pdfIn PDF document text
    • https://wofofubuw.weebly.com/uploads/1/3/2/7/132710679/1622708.pdfIn PDF document text
    • http://jatamonip.iblogger.org/boxing_star_apk_unlimited_money.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499984/normal_5fcb159564834.pdfIn PDF document text
    • https://cdn.sqhk.co/durotula/3gg7wd8/survival_rates_for_advanced_prostate_cancer_uk.pdfIn PDF document text
    • http://tuvugisuxizew.iblogger.org/60833370666.pdfIn PDF document text
    • https://nosuzodudoj.weebly.com/uploads/1/3/4/5/134588086/2802776.pdfIn PDF document text
    • http://rimiripa.mypressonline.com/o_estrangeiro_albert_camus_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380411/normal_5fdf1594b6869.pdfIn PDF document text
    • https://cdn.sqhk.co/kedilexele/nidd5if/warufeguwupevedobe.pdfIn PDF document text
    • https://cdn.sqhk.co/naxopesareg/Sy9Ri7c/cartoon_sound_effects_meme.pdfIn PDF document text
    • http://boviriso.22web.org/44296859269.pdfIn PDF document text
    • https://zatiwakap.weebly.com/uploads/1/3/1/8/131871625/8569343.pdfIn PDF document text
    • https://jawifeguviweti.weebly.com/uploads/1/3/2/3/132302916/6cf87f0806.pdfIn PDF document text
    • http://muxoman.mygamesonline.org/ambidextrous_organization_hbr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476146/normal_603e803ce3ba8.pdfIn PDF document text
    • https://sodefabufu.weebly.com/uploads/1/3/4/4/134473286/domitubunos.pdfIn PDF document text
    • https://cdn.sqhk.co/fejisedetu/CheigRL/konoboxemavupuvuxe.pdfIn PDF document text
    • https://cdn.sqhk.co/nivunufozub/MrEighb/zupelijanuxedowinaxon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448339/normal_600f17de8ebe8.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/e1630879-20cf-40e4-95a1-23b601baa52d/lokuwulu.pdfIn PDF document text
    • http://gabatotudam.rf.gd/13217119652.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/730d5084-7d13-4188-b80a-452b3385df7d/42885075643.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e441bb9-8fbb-4c6d-bfaf-68eee797a1cf/the_summoning_movie_kelley_armstrong.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d6a5ec6-89b6-4353-8cea-9e77155110c4/basic_physics_book_in_hindi.pdfIn PDF document text
    • http://foxukekamusun.onlinewebshop.net/lawuretokovarofif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c1a735d-542b-49d2-8663-6117b7510401/the_lion_the_witch_and_the_wardrobe_full_movie_cast.pdfIn PDF document text
    • http://dojidusajotat.epizy.com/adjetivos_descriptivos.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_off000111c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111C4 6088 bytes
SHA-256: aa4c7d73d86645cee151b720c25058a16e664a5679d3bf2905434b3676b55ddd
font_01_sfnt_off00012652.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12652 11064 bytes
SHA-256: 64eeeca31cbf6b684c2c7309fed148049f0c19d017e8ddf491333c6464fc3c38