Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca40bc44eba0041b…

MALICIOUS

PDF

66.6 KB Created: 2021-01-30 09:39:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: eedfae083780c135ab44d6bcd2a24720 SHA-1: 04b7701d1b734fff9239ad70ac1f6e243af9c52b SHA-256: ca40bc44eba0041b1c6df851c2fbde6603871379a447f69960ba1b4e30232661
96 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating external URI usage and is flagged by a machine learning classifier and ClamAV as malicious. The document body, though heavily obfuscated, contains text related to 'Confluence change background color of page', suggesting a lure. The primary IOC is the external URL pointing to a potentially malicious domain, likely used to host further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/123?utm_term=confluence+change+background+color+of+page PDF link annotation
    • https://cdn.sqhk.co/wozepefiga/KgijbwC/tawewixirin.pdfIn PDF document text
    • http://ruzazeruduzelu.22web.org/crucial_conversations_book_summary.pdfIn PDF document text
    • https://cdn.sqhk.co/vaxarogajib/jiLhegi/74860701654.pdfIn PDF document text
    • https://cdn.sqhk.co/tikalijit/fmWYThh/how_to_make_pottery_clay_at_home_easy.pdfIn PDF document text
    • http://tuworiki.22web.org/cdc_group_annual_report.pdfIn PDF document text
    • http://seomagnat1.online/46037178494x2n4x.pdfIn PDF document text
    • http://mebesovinu.22web.org/arduino_cnc_shield_v3.pdfIn PDF document text
    • https://cdn.sqhk.co/liregevo/iijjPhf/loop_yarn_blanket_pattern_criss_cross.pdfIn PDF document text
    • https://cdn.sqhk.co/moxinivo/gfKgdlK/all_creatures_great_and_small_2020_cast_tonight.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/palevijuj/jalijavixekijalotum.pdfIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/dotevusabujaforinetax.pdfIn PDF document text
    • http://junedujivoxoz.epizy.com/97376683529.pdfIn PDF document text
    • http://sozogakuvigoxev.epizy.com/98999545767.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/jirolutugodezosugidega.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/bootstrap_4_react_admin_template.pdfIn PDF document text
    • http://wixudilasajigil.rf.gd/63297803050.pdfIn PDF document text
    • http://duwamiwimi.rf.gd/puxakagenametiwejunusoki.pdfIn PDF document text
    • https://s3.amazonaws.com/perurulexi/balance_sheet_valuation_methods.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/ramonoz.pdfIn PDF document text
    • http://zoxuwabemowel.epizy.com/dole_minimum_wage_calabarzon_2018.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_off0000c4b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4B9 5348 bytes
SHA-256: c5904980e98c941873b115c60737f10aff913e6c9752f268777346f12972e570
font_01_sfnt_off0000d6de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6DE 11216 bytes
SHA-256: a4a3dceeb2d6acf95b3a908be1f63ec3faca69d6da389c77ea401c32074ecf44

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