Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9761d650429b756…

MALICIOUS

PDF

74.1 KB Created: 2021-03-15 17:22:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9f3461c8e1ada3db601df24f7c5b065 SHA-1: db8377b4b0d3fb580862543de09ca4d3baf8a645 SHA-256: c9761d650429b7567d67b197784e484612c1c2b30f8ed5c67b4f94bfa19c1810
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are part of a link farm, indicating a phishing or redirection scheme. The document body mimics a search result, further supporting a lure-based attack. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious content, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://botokaw.ru/strik?utm_term=washington+redskins+score+right+now
    • http://nutusugeralinet.mypressonline.com/viteg.pdf
    • http://help-bluebadgecenter.com/gipilidaduruwugekupusouf4er.pdf
    • http://tamodemuror.getenjoyment.net/apc_back_ups_700.pdf
    • http://hellesypakk.online/90907377143qf5gp.pdf
    • http://suzofovolavuk.scienceontheweb.net/lajisakilomurijit.pdf
    • http://fawaxifiwuzodil.scienceontheweb.net/optimization_algorithms_for_machine_learning.pdf
    • https://cdn-cms.f-static.net/uploads/4405459/normal_6039b1c9b4da0.pdf
    • http://menozamula.22web.org/spotify_premium_quality.pdf
    • http://bufibinokurun.scienceontheweb.net/golakumejumetusoda.pdf
    • http://hargotel.xyz/75575950388se13v.pdf
    • https://cdn-cms.f-static.net/uploads/4501993/normal_603821282c74b.pdf
    • http://mugedly.xyz/pathfinder_cleric_spell_list_printablezlf45.pdf
    • https://cdn-cms.f-static.net/uploads/4383321/normal_602500e8560cd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zabevog/dizefiriwibodudibujerafo.pdf
    • http://felubumasosazi.epizy.com/tovad.pdf
    • http://livuwiga.rf.gd/dexusuwaruru.pdf
    • http://fotizojorirepel.onlinewebshop.net/xurijuwibukeluje.pdf
    • https://s3.amazonaws.com/divexikav/being_the_center_of_her_attention_word.pdf
    • https://s3.amazonaws.com/kotenu/first_information_report_meaning_in_marathi.pdf
    • http://mafonevaverazux.atwebpages.com/14967775997.pdf
    • http://rodisasedozax.myartsonline.com/dixebijovaxigizorovexezuk.pdf
    • http://dopovis.myartsonline.com/junie_b_jones_film.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e46c.bin
8c407d61a8bb23612e74ea71afebc0a7eea036a2ef408e771a8a13ca7e4263b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE46C 5336 bytes
font_01_sfnt_off0000f6a5.bin
4e9e6f9d0a66d8d6aac470ad247d481cf1cfbd00b39157b1b29333f2d9fdcf47		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A5 10648 bytes

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