Malicious PDF — malware analysis report

Static analysis result for SHA-256 571a44642add19e5…

MALICIOUS

PDF

78.9 KB Created: 2021-02-25 23:43:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: cde276b9a70b67e5008c648e26439599 SHA-1: 9b205a0a025981011d640ef42b18fc35581ff036 SHA-256: 571a44642add19e58fbd8b1728e74bddffed5790248ff0ba5f229998140213ed
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body is heavily obfuscated, suggesting an attempt to hide its true purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://druttle.ru/strik?utm_term=best+way+to+listen+to+music+while+running+reddit PDF link annotation
    • https://cdn.sqhk.co/levowexesu/r4dghhi/nasa_federal_credit_union_credit_card_score_needed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450043/normal_60159fc7bda96.pdfIn PDF document text
    • https://cdn.sqhk.co/denepepunuja/ghibqsA/pop_music_playlist_2020.pdfIn PDF document text
    • http://giboxibefelas.22web.org/dial_tone_sound_effect.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462341/normal_5fcaeb6e7ba04.pdfIn PDF document text
    • https://cdn.sqhk.co/jofijoju/cgdiigh/snow_bros_2_game_install.pdfIn PDF document text
    • http://buviturowugigew.66ghz.com/28409448856.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371543/normal_5ffe0af08d5e6.pdfIn PDF document text
    • https://cdn.sqhk.co/zaperarori/0U3DOXi/jikugejusijof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470399/normal_5fd68c1d9eaa1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387810/normal_5ff1602396f79.pdfIn PDF document text
    • http://nenavukatebofaf.22web.org/monunuvemitufosoxe.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/kuboki/80919350876.pdfIn PDF document text
    • http://zamutuxagen.epizy.com/nowifelug.pdfIn PDF document text
    • http://vawomebez.rf.gd/sijir.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/birthday_invitation_card_template_india.pdfIn PDF document text
    • http://mutupoda.rf.gd/who_came_under_the_first_estate.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/centrale_sans_extra_bold_font_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/unconfirmed_report_crossword_clue.pdfIn PDF document text
    • http://nomekerileme.epizy.com/islamic_books_bangla.pdfIn PDF document text
    • http://xigipir.epizy.com/kazoweku.pdfIn PDF document text
    • https://s3.amazonaws.com/sojenozap/inorganic_chemistry_lecture_notes.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_off0000f536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF536 5596 bytes
SHA-256: f6bf9eea4dd9c6d531ca32cc2a8fa23b9b3c94359d8776ce913339b781dd8baf
font_01_sfnt_off0001082e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1082E 11048 bytes
SHA-256: ae2b65c814ff6efbb20711b59bace27e76a73b6a320d66eda7a8f0e14ead48ef

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