Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef94de60dd3866e4…

MALICIOUS

PDF

198.9 KB Created: 2021-03-18 00:59:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 61ea251e8cb10a88daf5195a92aa96f0 SHA-1: d986e958aa4bde058a313e821ace8d30f64c4339 SHA-256: ef94de60dd3866e421f2def96abe120fecc72546a720c8254281e85019c0599b
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document that contains an embedded URL, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with a high probability of being malicious. The embedded URL likely leads to a phishing or malware distribution site, indicating a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://zajinet.ru/wix?keyword=nwavguy+op+amp PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4500453/normal_5fc68ac913276.pdfIn PDF document text
    • http://prazdnikprosto.ru/22683707871w9uw9.pdfIn PDF document text
    • http://biomanix.best/que_es_educacion_fisica_recreacionwfani.pdfIn PDF document text
    • http://wijetaz.mypressonline.com/how_to_turn_on_landice_treadmill.pdfIn PDF document text
    • http://zoneeuro.pro/31335036627e4zgp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455884/normal_60374626a22fd.pdfIn PDF document text
    • http://fofiwafajelerax.sportsontheweb.net/how_to_open_a_t-fal_pressure_cooker.pdfIn PDF document text
    • http://kazexezawulozij.mypressonline.com/free_autocad_blocks_restaurant_furniture.pdfIn PDF document text
    • http://wowogobofomufu.mygamesonline.org/camtasia_studio_8_tutorial_espaol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381962/normal_604d4ae6c67bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406514/normal_601e0391a5ef8.pdfIn PDF document text
    • http://tixivepemom.22web.org/pusizipobujetipomekegew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420934/normal_5fe8615caa7e2.pdfIn PDF document text
    • http://gbo.guru/rufolenokobemugibomubazu997.pdfIn PDF document text
    • http://gradstroy.su/answers_for_interview_questions_for_teachers6kk1s.pdfIn PDF document text
    • http://visemomasa.66ghz.com/54884721157.pdfIn PDF document text
    • http://xovitixekewelom.scienceontheweb.net/oleo_de_borragem_bula.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mimugoso.rf.gd/busaz.pdfIn PDF document text
    • http://pilevujomeludo.rf.gd/21669570306.pdfIn PDF document text
    • http://lunurubu.rf.gd/loteruzepun.pdfIn PDF document text
    • http://poradenojipedu.rf.gd/despotismo_ilustrado_definicion.pdfIn PDF document text
    • http://wulibazosuxib.onlinewebshop.net/application_letter_for_teaching_vacancy.pdfIn PDF document text
    • http://biradenaj.rf.gd/tugudugakizananusijomikuv.pdfIn PDF document text
    • http://gijezilisabe.epizy.com/agenda_diaria_2020_para_imprimir_gratis.pdfIn PDF document text
    • http://dimonejoxu.rf.gd/java_jdk_kit_9.pdfIn PDF document text
    • http://vedixemalirugi.atwebpages.com/alimentacion_sana_durante_el_embarazo.pdfIn PDF document text
    • http://babokad.epizy.com/xogoguzovasoxejitogomex.pdfIn PDF document text
    • http://guseboses.atwebpages.com/what_are_army_correspondence_courses.pdfIn PDF document text
    • http://gezixus.myartsonline.com/meputiwegiwesuzikudi.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_off0002d241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D241 5056 bytes
SHA-256: 888c890c6e5e8f8fbff81635abe5aecb7dfe563c8ecd033e96bb2f272c9ceb1f
font_01_sfnt_off0002e391.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E391 11984 bytes
SHA-256: b8824d61034e5b08b90c80a013d264658a25b11f0463c61464682a77d8dccd72

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