Malicious PDF — malware analysis report

Static analysis result for SHA-256 084343a452989b31…

MALICIOUS

PDF

68.1 KB Created: 2020-12-21 23:37:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 689c45f394028e698a1f8a75d7b9b02c SHA-1: 96268f88a2bf14aa23c8b89692772f1d7ac498a1 SHA-256: 084343a452989b31cd062ca228d60dc5f711f2f34bc3b77c1ca2eeb838345dab
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 URL pointing to a malicious domain, identified by heuristics and a machine learning classifier as malicious. The document body, though heavily obfuscated, suggests a lure related to "Exoplanet latest news". The presence of external URIs and the ML classification strongly indicate a phishing or credential harvesting attempt, likely leading to a second-stage download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffe.ru/strik?utm_term=exoplanet+latest+news PDF link annotation
    • https://kasalaketowo.weebly.com/uploads/1/3/4/8/134871290/wotelid-poxid-dipevanipe-kewisuzur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393508/normal_5f97244453865.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451736/normal_5fd65607ea695.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389358/normal_5f9862769d338.pdfIn PDF document text
    • https://solusolifodijal.weebly.com/uploads/1/3/4/4/134433047/107204d9d3.pdfIn PDF document text
    • https://gixoxiri.weebly.com/uploads/1/3/4/7/134707295/fadekusa_resirim_lesijalijigik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425921/normal_5fbe89f27b8d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381541/normal_5fa7b8b2b7d11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375350/normal_5f8b9d2beebf6.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/jolunenafobuw/walmart_application_questionnaire_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/nature_brochure_template_illustrator_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sanekufiwumafo/28707214381.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/annabelle_2_movie_in_tamil_hd.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5E7 4836 bytes
SHA-256: 9ab962e29b5f10c894bbe30d55fa8a2f72272b6f25b597fb8497245e07f74872
font_01_sfnt_off0000d67b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD67B 1936 bytes
SHA-256: 73983ccd477f0e4c07634362c0f9f13a23cea415a26bff37f7f125d59a681190
font_02_sfnt_off0000dfbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFBE 10548 bytes
SHA-256: a5013f8e80f657fa98c50e80297add93dbcbfc4008792ac0c94de063cc58ea61

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