Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1b47b69bc7c4a44…

MALICIOUS

PDF

75.7 KB Created: 2021-03-11 04:11:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93f2cf0c4c260c5ce1fb668523898359 SHA-1: 27a9462c41909321cf0d713727771cccc449117b SHA-256: a1b47b69bc7c4a44c925a6a5966b9092824e4f4114d8da3c03fc4c6ff204dbc6
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that, when visited, likely leads to a phishing or malware download page. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to academic search results, suggesting a phishing attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/award?keyword=cornelius+castoriadis+pdf
    • https://static.s123-cdn-static.com/uploads/4413005/normal_5fee008222bee.pdf
    • http://wunadimizurened.medianewsonline.com/mbti_personality_test_types.pdf
    • https://static.s123-cdn-static.com/uploads/4410027/normal_5fe21a9e82595.pdf
    • http://wemuwetafivaxe.sportsontheweb.net/defikodo.pdf
    • http://viniveba.mywebcommunity.org/how_to_use_a_nextbook_tablet.pdf
    • http://pufimabakep.22web.org/kojabapavikev.pdf
    • http://sakipewo.22web.org/who_is_the_father_of_psychoanalysis.pdf
    • https://cdn-cms.f-static.net/uploads/4388422/normal_5fd84d5c0fb67.pdf
    • https://cdn-cms.f-static.net/uploads/4455174/normal_5fe76e0e85ff1.pdf
    • http://wazasoku.iblogger.org/sesajiwipujudo.pdf
    • http://tujozavido.66ghz.com/38428983527.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://widusop.atwebpages.com/10498166438.pdf
    • http://bopikor.epizy.com/tupuromuxenepewus.pdf
    • https://86f5e18a-8766-4ae7-b9bf-31430b627380.filesusr.com/ugd/911c12_8995b92e5aa14eefb11700aed36f36f7.pdf?index=true
    • http://tujevudaxuxos.epizy.com/mapleroyals_joon_bishop_guide.pdf
    • https://6e7ef639-f89a-4701-86f9-710a836f1183.filesusr.com/ugd/12745a_fa87187b6a924034adb53e1388f2dceb.pdf?index=true
    • https://e691ad07-92dc-45fa-af10-8929b4045ede.filesusr.com/ugd/87b9a8_8e2dae930e64451db9a5dec4dc5ed91d.pdf?index=true
    • http://fusatepalu.epizy.com/renok.pdf
    • http://dozokefonusabo.rf.gd/protein_smoothie_recipes.pdf
    • http://neromozib.epizy.com/pokojogifidutinorilepoleg.pdf
    • http://midelex.epizy.com/nagunim.pdf
    • https://3d7304b5-8527-495f-b913-615d6f357a43.filesusr.com/ugd/ef7486_07e342da11884461984026b0f56d68c8.pdf?index=true
    • http://rufofexejojar.epizy.com/arduino_uno_schematic_r3.pdf
    • http://bopamebedozupux.epizy.com/jabukonezufakewekiso.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eca7.bin
54d8c408d7f5fb44ef510397789cf28b428fbc806fde673a671c4f99c3f2a8c8
pdf-font-stream PDF embedded font (sfnt) at offset 0xECA7 5052 bytes
font_01_sfnt_off0000fde2.bin
bacb1c75b95653d6e83ed5ec619f70cb983eba3f05c9ac2990f50a6cddd86580
pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE2 10424 bytes