Malicious PDF — malware analysis report

Static analysis result for SHA-256 94f0fb5aaff5e03a…

MALICIOUS

PDF

100.5 KB Created: 2020-12-14 20:03:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 72166f28e599945354454b0db0b89fb5 SHA-1: 6edd594896786957d886e688d6d18a858086406b SHA-256: 94f0fb5aaff5e03ab21e88d468f4ae09befead720cb06ee39be9f991000048af
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified by ClamAV and ML classifiers as malicious. The document body, though heavily obfuscated, appears to contain text related to 'snake plant propagation rotting' and metadata indicating it was generated by wkhtmltopdf, suggesting a lure to a phishing or malware distribution site. The presence of an external URI strongly suggests an attempt to redirect the user to a malicious resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://trafftec.ru/123?utm_term=snake+plant+propagation+rotting PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb4c1e1e-375c-4eb6-bb71-cb1824fa220f/classroom_instructions_in_spanish.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/89185935966.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/84266152745.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5ada1c89e1c4b8fdf3d5c/t/5fc7ea9380e10a08e14a35c6/1606937235848/black_hole_for_ios.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/raremuzojufadazulavo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5313f104edf1d779d1ce4/t/5fcf17d457846c5b834ed22f/1607407573657/92506295817.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/equations_of_lines_worksheet_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54f6f085-173b-4613-9efe-1a38b400c93c/poe_lapidary_lens.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9a480f4-0612-4b95-8b0b-62d328adf481/science_olympiad_ornithology_practice_test.pdfIn PDF document text
    • https://s3.amazonaws.com/wemupajese/55432339996.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc16c877848ba205d1c3861/t/5fc2b7f52dd96f591847dbdd/1606596598104/nevix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13371108-7a8b-4645-b71c-9434f9ec7b44/ruxadetawibamilixidawumux.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEF0 4976 bytes
SHA-256: f17dddd9a9dd4ae485d01f8e977cb5270f779d783de7799a2a4f770b4a7ac85b
font_01_sfnt_off0000dfe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE9 30100 bytes
SHA-256: de63e4c9ff0fdcba93c82707bfd3adaa023ceacf9fc6026c0466c02dd1bef8d3
font_02_sfnt_off000138ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138CE 11540 bytes
SHA-256: 7d49218073b0ba8bd1b11ef358976d8c13c55b839ae305d6a8dd92e16a3cdedf
font_03_sfnt_off00015fc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FC5 20616 bytes
SHA-256: 1bb33b5133b19bfd9fafb5ca86421166deb26ea4d7116cb9b180c6f0a9a5cf01

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