Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d0d55f13804c22c…

MALICIOUS

PDF

75.4 KB Created: 2021-02-17 11:50:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 2307a5dbdb0b3e265cab60d23906a0bc SHA-1: db61b908cc035d78c922f7e7dbe5ae17f8cd146f SHA-256: 1d0d55f13804c22c75c218746d294ca0ff49cf3b011c27aa7b1d5520391f3a06
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, suggests a lure related to academic material to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://baarspo.ru/wix?keyword=chemistry+book+chapter+11+assessment+answers PDF link annotation
    • https://cdn.sqhk.co/wosipuvetot/NapiaAt/nixos_home-_manager_options.pdfIn PDF document text
    • https://cdn.sqhk.co/sezunofubuzi/ijd5hiw/55114485835.pdfIn PDF document text
    • https://cdn.sqhk.co/vozeseseber/f4ahdgd/xunebakoxasebogoresuge.pdfIn PDF document text
    • https://cdn.sqhk.co/talidapato/jbAkTig/life_after_death_book_in_tamil.pdfIn PDF document text
    • https://cdn.sqhk.co/gipagigo/dhfghje/moore_theatre_south_haven_michigan.pdfIn PDF document text
    • https://cdn.sqhk.co/lilaxikixo/c9ybKvr/fireboy_and_watergirl_the_forest_temple_kizi.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/baxunaf/56695781613.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/34115419018.pdfIn PDF document text
    • https://s3.amazonaws.com/nefagolom/difaxixodolepapi.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/living_electronic_music.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/62090641091.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaporam/nugeno.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/hezekiah_walker_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabisura/force_table_lab_report_discussion.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/56889667100.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/sanikezafufawibejanu.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/29835076559.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/zesefafedixezirudotu.pdfIn PDF document text
    • http://sapakebozo.rf.gd/ethiopian_music_oromo_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/6-_1_discussion_critiquing_research_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/24_hour_clock_format_table.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d593.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD593 5496 bytes
SHA-256: 68a218f0d37a34df45b15c86a21c1513edef7319239e2ca63e0687f156953f6b
font_01_sfnt_off0000e830.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE830 10020 bytes
SHA-256: 7c3538036b8886ed68d2b63bae4eaaa1cb5e31557db7070c3d72bc55841f4906
font_02_sfnt_off00010ad1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD1 16080 bytes
SHA-256: e8a2a40c81204f68d188656ee186563bb41cec9665ac8bf1c139965098426a80

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