Malicious PDF — malware analysis report

Static analysis result for SHA-256 54bb2f7e11723f7c…

MALICIOUS

PDF

93.2 KB Created: 2021-06-09 16:42:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: a9251a71f2ec01d0369dd84c62538925 SHA-1: a821c500ea00b73477d597855fce032410cf006a SHA-256: 54bb2f7e11723f7ccd1307d83f14ef6a5f3b83ecb6fba6541d5f7a22350debba
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 hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of techniques used to deliver second-stage payloads or redirect to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/123?utm_term=counterfeit+gods+pdf+free PDF link annotation
    • https://betiriwusogaz.weebly.com/uploads/1/3/1/3/131380032/bijeramaw-gefunabup-vojawe-sigudanip.pdfIn PDF document text
    • https://koledino.weebly.com/uploads/1/3/4/3/134332835/pifevasugolusir.pdfIn PDF document text
    • https://fogujudusimasob.weebly.com/uploads/1/3/4/7/134713994/6720647.pdfIn PDF document text
    • https://duguzimelape.weebly.com/uploads/1/3/4/6/134666192/nofiba-vexugemim.pdfIn PDF document text
    • https://jokiwaxe.weebly.com/uploads/1/3/2/7/132740814/tinawetowukaw.pdfIn PDF document text
    • https://tujupanex.weebly.com/uploads/1/3/5/3/135333196/xuratelumu.pdfIn PDF document text
    • https://zuborezebakit.weebly.com/uploads/1/3/4/6/134638686/61773882.pdfIn PDF document text
    • https://fobuxowomi.weebly.com/uploads/1/3/4/2/134235628/1295580.pdfIn PDF document text
    • https://befewegumezozem.weebly.com/uploads/1/3/1/4/131453636/tosuzipuna-nuvemazodazopam-zajiwadexami.pdfIn PDF document text
    • https://fililajivivumir.weebly.com/uploads/1/3/4/4/134456316/tosakijonud-gegejo-xujabi.pdfIn PDF document text
    • https://najunores.weebly.com/uploads/1/3/4/3/134381484/6414982.pdfIn PDF document text
    • https://dupuzebor.weebly.com/uploads/1/3/4/6/134639309/807204.pdfIn PDF document text
    • https://xapovakugad.weebly.com/uploads/1/3/5/3/135393008/4282488.pdfIn PDF document text
    • https://jovasesuba.weebly.com/uploads/1/3/4/3/134332727/0bfe013.pdfIn PDF document text
    • https://gomigara.weebly.com/uploads/1/3/4/7/134727279/jalisedipilenawaware.pdfIn PDF document text
    • https://vusesuke.weebly.com/uploads/1/3/4/7/134723580/b9073ffebf.pdfIn PDF document text
    • https://jinikegubu.weebly.com/uploads/1/3/4/8/134873825/5975024.pdfIn PDF document text
    • https://wotopegajoxife.weebly.com/uploads/1/3/4/0/134042499/gojilerubos-gebefimizaku.pdfIn PDF document text
    • https://naloguvobiwulup.weebly.com/uploads/1/3/1/1/131163976/7239801.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bazibenis.pbworks.com/f/58781816518.pdfIn PDF document text
    • http://gesugot.pbworks.com/w/file/fetch/144860877/furejuzowafo.pdfIn PDF document text
    • http://jagimikat.pbworks.com/w/file/fetch/144759192/net_framework_5.1_for_windows_10.pdfIn PDF document text
    • http://xobapotowi.pbworks.com/w/file/fetch/144661536/manual_de_discipulado_para_nuevos_creyentes_guillermo_maldonado.pdfIn PDF document text
    • http://nagaxop.pbworks.com/f/15152017334.pdfIn PDF document text
    • http://fudejob.pbworks.com/w/file/fetch/144517809/39291585952.pdfIn PDF document text
    • http://zuwuzemoj.pbworks.com/f/c_language_beginners.pdfIn PDF document text
    • http://silasofinat.pbworks.com/f/jonathan_livingston_seagull_test_questions.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_off00012e0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E0D 4872 bytes
SHA-256: 27b56fff49373e237581bf88f83d6327eb29a00b90189bcaef3a683054dd0ede
font_01_sfnt_off00013eb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EB4 11728 bytes
SHA-256: 47dd05fc7eddf4688b186be12793e806e13d61fe656f3ae20a3b2a1c15df7c82

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