Malicious PDF — malware analysis report

Static analysis result for SHA-256 0aca9b52b5860465…

MALICIOUS

PDF

65.7 KB Created: 2021-03-11 08:37:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: e81a1bb99081de392a17c1c0a8ce0745 SHA-1: 27c9ce01c9113422617d750f499485d023f99416 SHA-256: 0aca9b52b58604654c9dc09ec64ed22210eab728542162ef618e74e6a1e2f134
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The document body, though partially corrupted, contains a lure related to repairing a dishwasher, which is likely a pretext to encourage clicks on the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://vilenefex.ru/strik?utm_term=how+to+put+a+dishwasher+back+together PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4464524/normal_5fe1a2e766e85.pdfIn PDF document text
    • https://cdn.sqhk.co/kuretunaba/cl3a9v5/98973857645.pdfIn PDF document text
    • http://healthit.space/453594922897r4yr.pdfIn PDF document text
    • https://cdn.sqhk.co/lalusozokigi/XfrahgI/pibazigetemixapopofobimu.pdfIn PDF document text
    • http://kurametugugu.mygamesonline.org/deliberao_cee_73_2020.pdfIn PDF document text
    • https://zomereke.weebly.com/uploads/1/3/5/3/135397468/mafaret.pdfIn PDF document text
    • http://arfeshome.com/research_proposal_format_examplemynvd.pdfIn PDF document text
    • https://cdn.sqhk.co/bupabumo/iai8zlX/spqr_a_history_of_ancient_rome_book_review.pdfIn PDF document text
    • http://myyshooop227.site/289391080661gytn.pdfIn PDF document text
    • https://tiwirekofer.weebly.com/uploads/1/3/5/3/135314588/gitafof_fafeki_julakasu_zutikutaga.pdfIn PDF document text
    • https://cdn.sqhk.co/fetebutujo/igezgei/rubuwa.pdfIn PDF document text
    • http://ig-copyrighthelpcenter.com/86744623466yyvcw.pdfIn PDF document text
    • http://kittyplay.online/john_deere_9500_combine_horsepowerhv1dp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416938/normal_5fd7621644ace.pdfIn PDF document text
    • http://rosutob.getenjoyment.net/what_are_structured_credit_products.pdfIn PDF document text
    • http://ziwusis.getenjoyment.net/can_you_have_coconut_milk_on_21_day_fix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489257/normal_602df6744673d.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/bgh6ihh/riwejutebibesokazoposiwi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zisukuvi.atwebpages.com/63072104103.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_off0000c3d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3D5 5560 bytes
SHA-256: c09ade783acdefe709f27da2bab4ad4d25a371e09bfe29411d615b659b70d63e
font_01_sfnt_off0000d6c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6C6 10224 bytes
SHA-256: 7711e0d4ec42aefd51bba942512c11a7ec7044e01e2c850ceebf3113cb263f2a

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