Malicious PDF — malware analysis report

Static analysis result for SHA-256 33fa383e23539e3d…

MALICIOUS

PDF

63.8 KB Created: 2020-11-28 22:03:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: cdaa0495370f61a218a605d4009c1b81 SHA-1: 5dd8644ef6918dc4ca11370cc7b98d866ca4132e SHA-256: 33fa383e23539e3db6a30ab201eef0c3129c3825940b750a88021c253a66ced5
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains an embedded URI pointing to a suspicious domain, likely a phishing lure. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

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://trafficel.ru/strik?utm_term=simple+harmonic+motion+pendulum+lab+report+conclusion PDF link annotation
    • https://zalopajozi.weebly.com/uploads/1/3/1/4/131453352/d4675c99a6a52.pdfIn PDF document text
    • https://fekukutetixamam.weebly.com/uploads/1/3/4/6/134636283/41541bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413697/normal_5faf4a6659456.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424689/normal_5fa59cfc6b46b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370053/normal_5f8a95b761798.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443595/normal_5fb932d632e7d.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/setikizo/26655515783.pdfIn PDF document text
    • https://s3.amazonaws.com/murudute/zapatron_fortnite_picture.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/sazegaf.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/20307373924.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/agreement_format_between_two_parties.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8190866-9217-41bd-8870-a7c3c2b17253/astute_in_a_short_sentence.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/83895851169.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_off0000bcea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCEA 5556 bytes
SHA-256: d2baebb25e91c1d26638454cdd59d89bae6bb4bfeeafc00decea710635a102a5
font_01_sfnt_off0000cf90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF90 10096 bytes
SHA-256: 0b30448ddf18708caedfd2b9c65cc27e49aa2d654bd25a12128f42c56fcb3a74