Malicious PDF — malware analysis report

Static analysis result for SHA-256 72253b81dbb9ab4c…

MALICIOUS

PDF

74.4 KB Created: 2021-02-17 22:41:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 45e703ce11b55b5610eb160d8508f9fc SHA-1: b2e5884aba383eae5b7166b35140ab4654e848cb SHA-256: 72253b81dbb9ab4c3861b592897308f575ce08b3937f132002427c7dd717ea89
96 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of external URIs suggests an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maypoin.ru/wix?keyword=amika+straightener+price PDF link annotation
    • http://vk-settings-change.online/innovators_mindset_study_guidebw4hv.pdfIn PDF document text
    • https://cdn.sqhk.co/xubupigegi/hejdhiv/u_mobile_unlimited_funz_prepaid_plan.pdfIn PDF document text
    • http://zavodtriumf.com/635866547438omuz.pdfIn PDF document text
    • http://thesimplycompleteseries.com/paninuwawupez6q2t.pdfIn PDF document text
    • https://cdn.sqhk.co/nomitusibop/acxLxxH/98420351171.pdfIn PDF document text
    • http://wofomeko.22web.org/responsive_landing_page_templates_html.pdfIn PDF document text
    • http://knitfqph.site/discover_canada_citizenship_guide_audio9qsqw.pdfIn PDF document text
    • http://straponartist.com/75182453954ub3o2.pdfIn PDF document text
    • https://cdn.sqhk.co/koditisalupe/dicgfyd/nutefotoke.pdfIn PDF document text
    • http://ziwumaguvogog.iblogger.org/rational_form_math_definition.pdfIn PDF document text
    • https://cdn.sqhk.co/dubikureta/cghijGa/33808348225.pdfIn PDF document text
    • http://bighome.space/free_template_cv_kreatif_bahasa_indonesiaj3hpt.pdfIn PDF document text
    • http://thiswaytovogue.com/274885664842meg6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gewisetug/mahindra_thar_images.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/33000374319.pdfIn PDF document text
    • http://mosepurone.epizy.com/mivonisalagafusar.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/cardinal_wiseman_greenford_sixth_form.pdfIn PDF document text
    • http://sazojojuw.rf.gd/bengal_tiger_movie_songs_teluguwap._net.pdfIn PDF document text
    • http://galikamot.epizy.com/data_analysis_sql_and_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/naruto_online_hack_2017.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_off0000dd37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD37 5368 bytes
SHA-256: 3b58162770697bf4808a007a176d29c070559f32112e53c194ed3e53744f9dca
font_01_sfnt_off0000ef51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF51 14388 bytes
SHA-256: abf1e8dbdb49801cfb75136d8a508acacc1985a4a70efdc12cd5974680aa89ee

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