Malicious PDF — malware analysis report

Static analysis result for SHA-256 52072711f23ffe2a…

MALICIOUS

PDF

77.7 KB Created: 2020-11-21 03:31:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 428a1ad49b9f8c326f2ef530e7568f6a SHA-1: bcefb2325f8fe1613e2a9bb038e06a57f96c9916 SHA-256: 52072711f23ffe2a8092c318e08defe735625193c7cf52938c76450297a1efeb
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URL points to a domain associated with phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to exploit vulnerabilities or trick users into visiting 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://trafffe.ru/123?utm_term=html+for+beginners+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393029/normal_5fa6571ceddcf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366367/normal_5fa3b36eb4754.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415770/normal_5fa76e803c20f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/134a9efb-af96-4285-a419-5b0d34ce9ea5/pieces_amanda_cook_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d711a32f-ca28-4853-8e95-46e773ad278e/42757494467.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bf24e54-7bcb-4cc2-bb42-da8dd1d8b17e/dog_gifts_images.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/icd_10_code_metastatic_nsclc_lung_cancer.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/ace_test_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/tepitimuji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0b48844-6137-4fdc-92bd-fb240d3bb833/23300124793.pdfIn PDF document text
    • https://s3.amazonaws.com/gajejasa/5_indicators_of_a_chemical_change_examples.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_off0000f287.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF287 5252 bytes
SHA-256: b160318b75ede42dd80c73c297aa9beeeed8387a72553bedab34c296c8285c0f
font_01_sfnt_off0001044c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1044C 11348 bytes
SHA-256: b81e724063f6d61829711fb910b08ca802b4483a194c4a25b44fb0792c7db17f