Malicious PDF — malware analysis report

Static analysis result for SHA-256 067ece61137453bd…

MALICIOUS

PDF

82.8 KB Created: 2021-03-28 13:12:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: abe016108b1b284a7cbdb133874b011c SHA-1: d3340b27d5ae09aa3c952bc917f054e4c96b0298 SHA-256: 067ece61137453bda9ee5fce85f7eec61ade11d186e383c112c3237c15b60305
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ML classifiers and ClamAV, as malicious. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm or phishing attempt. The primary malicious URL identified is https://baarspo.ru/wix?keyword=night+study+guide+packet+answers, which is likely used to deliver a secondary payload or redirect to a phishing site. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://baarspo.ru/wix?keyword=night+study+guide+packet+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371514/normal_5fdbb9615a59e.pdfIn PDF document text
    • http://gedirobidepud.scienceontheweb.net/casio_fx-300es_plus_engineering_scientific_calculator.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489412/normal_5fdadb7a04726.pdfIn PDF document text
    • http://laludinemolat.sportsontheweb.net/math_books_for_grade_3_deped.pdfIn PDF document text
    • http://tatuxuvoziparu.mywebcommunity.org/hey_there_delilah_tabs.pdfIn PDF document text
    • http://zonuvak.medianewsonline.com/25373967120.pdfIn PDF document text
    • http://neriwor.medianewsonline.com/catechism_of_the_catholic_church_malayalam.pdfIn PDF document text
    • http://nuxuzuruguli.mypressonline.com/59527826223.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366397/normal_603c1769de528.pdfIn PDF document text
    • http://fuxisileza.mywebcommunity.org/89221836071.pdfIn PDF document text
    • http://nubilofanekib.mygamesonline.org/adobe_photoshop_cs2_tutorial_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379046/normal_60438b80dc6d7.pdfIn PDF document text
    • http://dorulezebum.sportsontheweb.net/isometric_and_oblique_projection.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459794/normal_5ff2f3238296a.pdfIn PDF document text
    • http://lomigakorak.getenjoyment.net/netozawajuriwapebijag.pdfIn PDF document text
    • http://jaralet.getenjoyment.net/difference_between_1_phase_and_3_phase_induction_motor.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pelebirepopo.onlinewebshop.net/what_is_sprint_in_scrum_methodology.pdfIn PDF document text
    • http://dupepoge.onlinewebshop.net/tisawowatari.pdfIn PDF document text
    • https://720c7b34-a033-4bf0-83ea-6be17de98aa2.filesusr.com/ugd/03ef8e_25df8d19a3e34078b879eda49e60528f.pdf?index=trueIn PDF document text
    • https://493f174a-a540-412c-bacb-e5b7b26cbfcf.filesusr.com/ugd/95bb70_63e9293f28254827864b9d13f84f068d.pdf?index=trueIn PDF document text
    • https://5637a596-61ce-4e67-8953-8fd9cb84b940.filesusr.com/ugd/c20ea7_86a60d07f95d4fd68005fc08882df0ff.pdf?index=trueIn PDF document text
    • https://40c507a3-37b7-491f-afd3-f28ba3af1fb2.filesusr.com/ugd/7f5264_899d1469312c4b0ebf8f071af1602ea9.pdf?index=trueIn PDF document text
    • http://kageditivumimor.onlinewebshop.net/convert_to_word_without_acrobat.pdfIn PDF document text
    • https://9a89a7da-ede3-42eb-a537-7416be21eb2d.filesusr.com/ugd/aaaf79_b9f6e7b762244be498c5bac195dc469a.pdf?index=trueIn PDF document text
    • http://susabumo.atwebpages.com/genero_literario_que_exalta_la_expresion_de_los_sentimientos.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_off00010538.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10538 5528 bytes
SHA-256: 85eb7d53cb4d647ef4a21417bb2b544a4f2af5e9a5ee7a51c2451f97d2706b6a
font_01_sfnt_off00011829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11829 11020 bytes
SHA-256: e982bd2f135f759208d6ed7fc221cd7b5001c7d6f2735fbf34c6fff7d1b3fbc0