Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc691addaed80a6e…

MALICIOUS

PDF

115.3 KB Created: 2021-03-23 20:51:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f3199dde889dbe81e099c41cfc9d08c SHA-1: a592a164f1ab9c2151078ce761897b642cfcac23 SHA-256: bc691addaed80a6e290a93c3ac552cc43374c6bba2286352f43d4517f86225bb
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a malicious domain, disguised as a search result for educational content. ClamAV detected this file as 'Pdf.Phishing.Trojan', and a machine learning classifier also flagged it as malicious. The primary attack vector appears to be directing users to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://mezovuduw.ru/wix?keyword=pseudocode+and+flowchart+exercises+and+answers
    • http://tepugorotewole.medianewsonline.com/sefizoposuz.pdf
    • http://nizavevorupuj.mywebcommunity.org/roxizubevusujudumelavi.pdf
    • http://sowoxapexemex.sportsontheweb.net/69020254007.pdf
    • http://vavoferidedodif.66ghz.com/19425420815.pdf
    • http://lugodapamaj.mygamesonline.org/11472383715.pdf
    • http://ravasixojodari.mygamesonline.org/what_fuel_does_a_stihl_blower_use.pdf
    • http://gemofesane.medianewsonline.com/kajogop.pdf
    • http://ziposodepow.mywebcommunity.org/basic_biochemistry_questions_and_answers.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/5300c39c-52d1-4ec7-b1f2-b284703db116/bojifizusum.pdf
    • http://tafiwepamubov.atwebpages.com/77871189648.pdf
    • https://uploads.strikinglycdn.com/files/b766d2ed-6777-4cdc-a382-f74e0a8656e8/65285786401.pdf
    • https://uploads.strikinglycdn.com/files/10302072-decf-406b-a2b4-4def16de4e32/37572044517.pdf
    • http://dimarujevetuvif.epizy.com/multiplying_fractions_worksheets_with_answers_grade_6.pdf
    • https://uploads.strikinglycdn.com/files/99a93ed6-b347-4ff8-98da-67973c95dc72/cheap_hair_salons_near_me_open_now.pdf
    • https://uploads.strikinglycdn.com/files/18226ce3-bf19-4ee0-b9c6-ee5465a898dc/how_to_set_up_onetouch_ultra_2.pdf
    • https://uploads.strikinglycdn.com/files/f884d5f4-def1-43ef-a91b-be81bc52a547/63042603357.pdf
    • http://lajirobodogew.epizy.com/tomaradaf.pdf
    • https://uploads.strikinglycdn.com/files/a0c6ca66-5fdb-4b79-89e7-f2d4545cfe4c/retikuzajezopojanojedazos.pdf
    • https://uploads.strikinglycdn.com/files/ab1034aa-98db-4397-8039-32f60d91b357/15444228625.pdf
    • https://uploads.strikinglycdn.com/files/dff42f29-4d3b-45e1-9829-ba87f6ac2599/how_to_pair_jbl_flip_to_iphone.pdf
    • http://wegugoleta.onlinewebshop.net/carrier_weathermaker_8000_wont_turn_on.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000130da.bin
f4544a3d84b3d17b745983f38c1227b7b3377d4bfaed58bebc774dd39abacfce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x130DA 6808 bytes
font_01_sfnt_off000141d7.bin
66935ed9cdbda7adc4ca4821acfe15b78daca84e79836e75d2f8e08be54467ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x141D7 3832 bytes
font_02_sfnt_off00014f94.bin
45b218f3cf240292fc5109174060f27ce0674cc0fbf17119bdeea91b4d077992		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14F94 5272 bytes
font_03_sfnt_off0001618f.bin
fe323ef5aca703dfa1fc17a4e469490fef8bf25b15f7d665d2e7ff7e5ab22ffe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1618F 15508 bytes
font_04_sfnt_off0001954e.bin
703df6990096502d61251d8cbdc720085fab6420ee27f8658627ad65f08f0b35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1954E 17228 bytes
font_05_sfnt_off0001aeb2.bin
04d1c1794f83f69e16e94232172182c8baa10692f65f0d6d88aa1b699bda9fb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1AEB2 6172 bytes

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