Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7f44c9544497f1c…

MALICIOUS

PDF

68.2 KB Created: 2021-02-22 00:09:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 48648235954662f135eb956efacc8015 SHA-1: c245f6e8dc4c3679336c602191fea870fb1a45b5 SHA-256: b7f44c9544497f1cc0e898d399d1fcc2ea74fa7c055c443d5e7c40277c7297d3
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI that directs the user to a suspicious domain, likely to deliver a malicious payload or conduct phishing. The document body, though heavily obfuscated, appears to be a lure related to search results.

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://druttle.ru/wix?keyword=free+lor+pixel+sequences PDF link annotation
    • http://salea.site/5169471683848esc.pdfIn PDF document text
    • http://coloradocustomelectric.com/70639623786fd6x7.pdfIn PDF document text
    • http://reduslimitaly-official.website/pokiravodewq2yn6.pdfIn PDF document text
    • http://domen3.club/bofifoxrgyy9.pdfIn PDF document text
    • http://mylic.ru/star_trek_movies_chris_pine_4xl710.pdfIn PDF document text
    • http://koxuduravinas.22web.org/3d_pencil_drawing_tutorial_step_by_step.pdfIn PDF document text
    • http://cpskras.website/synonyms_quiz_for_grade_7_with_answersw8anq.pdfIn PDF document text
    • http://devgm.design/58786610603hojik.pdfIn PDF document text
    • http://slampochka.ru/toxicwap._com_series6rl4r.pdfIn PDF document text
    • http://reduslimitalia.site/kelezesabujifopaser01lq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388428/normal_60014136859ea.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/gupojakami/mutadogode.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/ziwubolepizirebunawu.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/piwokozukunejaf.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/sms_backup_iphone_to_android.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_off0000d0da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0DA 4864 bytes
SHA-256: 3d4390309ed1b9098a93220ac4723d9ebe2dcb94154b5b5f13374f33d48cd469
font_01_sfnt_off0000e186.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE186 10156 bytes
SHA-256: 2a5e643fdd536fa9fda6511faffaf710c5c40f5ed3ee57fc5d0d0f5fa92ab59c