Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebe83034e4467650…

MALICIOUS

PDF

76.6 KB Created: 2021-04-10 03:09:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 7a1b3fce18976654ab975606e9c4a55d SHA-1: f4808d51d748b1a435256f11aaa2134ad0a40d47 SHA-256: ebe83034e4467650869878cf190c10f8994ea916917285b1d3d1c92bb0065ad6
126 Risk Score

Malware Insights

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

The PDF file contains multiple external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lead users to phishing sites or download further malware. No scripts were extracted, but the PDF structure and embedded URLs are sufficient evidence of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://midufefew.ru/strik?utm_term=what+is+the+legal+definition+of+contributory+negligence PDF link annotation
    • http://vebuwovivulab.mygamesonline.org/51677654977.pdfIn PDF document text
    • https://cdn.sqhk.co/rukugewul/fL6FOhc/90773679778.pdfIn PDF document text
    • http://x-bionic.shop/what_does_the_acronym_ip_stand_foru8hea.pdfIn PDF document text
    • http://bogplaktnc.fun/muvofitadakenunaselotatoyhgr.pdfIn PDF document text
    • http://eroganoficial.site/automate_convert_excel_toh3kmp.pdfIn PDF document text
    • http://verifybadgehelp.com/83171186066bfvog.pdfIn PDF document text
    • https://cdn.sqhk.co/wujakegu/ihfhgt2/89310822528.pdfIn PDF document text
    • https://cdn.sqhk.co/baluwofuk/J7tMTib/rowdy_wrestling_mod_apk_an1.pdfIn PDF document text
    • http://zenajok.medianewsonline.com/16493255105.pdfIn PDF document text
    • http://mx50off.pro/kenmore_elite_he4t_washer_no_powermrvlh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zitasixan.atwebpages.com/62863108557.pdfIn PDF document text
    • https://f8d82b49-d438-4da2-b906-f876cb6fe635.filesusr.com/ugd/12dc78_f1ae56e331bf41318f3519015dae7c0b.pdf?index=trueIn PDF document text
    • https://db532842-334f-4efb-8993-e67ec8f20ff5.filesusr.com/ugd/bc5be3_7fd296191183442c812e64e1ced1a412.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/are_multi_gyms_good_for_building_muscle.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/xugejigesizatevotinu.pdfIn PDF document text
    • https://1eb42bdc-3da6-4b32-b75f-4382f1721f8e.filesusr.com/ugd/35474d_477b0bf0c29c4e7494b3921055326063.pdf?index=trueIn PDF document text
    • http://retelowanudugut.epizy.com/45076616240.pdfIn PDF document text
    • https://e8f98835-b194-42a5-b43f-fe2f29920dd6.filesusr.com/ugd/bf650e_f7973bdd01c441209881244cb7561b65.pdf?index=trueIn PDF document text
    • http://lefadubofow.rf.gd/40299257119.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/31704660296.pdfIn PDF document text
    • https://1e1f235d-56dd-4976-b20d-d38e3fe7b172.filesusr.com/ugd/210b45_e11c39e80ab34dd699a7472fccc2f02a.pdf?index=trueIn 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_off0000ed22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED22 5536 bytes
SHA-256: c95a1973a56ad9a30487fae99c486314c751b2760fe461fa83a8b85ef8051f96
font_01_sfnt_off00010002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10002 10736 bytes
SHA-256: 023b762cc6b3283366250d83ba011282aa6774726129b2f9d911320c06ff5148

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