Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c5d709aa09595d7…

MALICIOUS

PDF

76.7 KB Created: 2020-11-19 00:48:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 6494ba9dd2648e4029762cd2d3e6559b SHA-1: 30195e6d9decc7c362f3d0ac510e679147833e4c SHA-256: 5c5d709aa09595d7711a895b9baaa2c5791fe52a7065d834ea932646d499aa65
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The embedded URL points to a suspicious domain and is presented in a context suggesting a lure for pirated content. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest it's designed 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://trafffi.ru/123?utm_term=interstellar+full+movie+online+youtube PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454302/normal_5fb27eb0b968f.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/rimepusox/future_bass_sample_pack_serum.pdfIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/317000810.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b895a21-6a74-4843-8ce4-9da5bf431f0c/tuweboremelabudewerovik.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/24422399508.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/nadaguides_used_value.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/37369803321.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/spring_concert_umass_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/sedowedi/27885349112.pdfIn PDF document text
    • https://s3.amazonaws.com/xebareto/transcription_and_translation_worksheet_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f062dc3-d2b0-40e7-aeac-0ea1ed86d6e2/pathfinder_vampire_hunter_class.pdfIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/pamunolinogamazolewora.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/razesisal.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/surah_an_naba_full.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_off0000eae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE9 5152 bytes
SHA-256: e390eaebaf975634fc47567c112b87ee50825371090bceaaaa950a5788b9be36
font_01_sfnt_off0000fc65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC65 12972 bytes
SHA-256: bc1e4b1d5f55faed077d8b03f7c32957d7a5b62ed01cf995e36eba6677d839d2