Malicious PDF — malware analysis report

Static analysis result for SHA-256 52420adc3b5f85b6…

MALICIOUS

PDF

92.0 KB Created: 2021-03-02 23:40:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 2aa6fa4b8d15fa059d503dd6965d7d9f SHA-1: ab7b387fa5efa3311de3c2b5277dedb9afa6ceb2 SHA-256: 52420adc3b5f85b6d099c2542fff987d7903ae4d72da88b61129a19d0e200ac9
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document body, though heavily obfuscated, contains text related to 'Isentropic efficiency of a turbine' and an embedded URI points to a suspicious domain, likely a phishing lure. No scripts were extracted, but the PDF structure and embedded URI suggest a phishing attempt.

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://gimoguvi.ru/award?keyword=isentropic+efficiency+of+a+turbine PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4473403/normal_5fe7a1a23742c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501380/normal_5ff25745a70ed.pdfIn PDF document text
    • https://cdn.sqhk.co/ranetixeba/gZihgja/93449728067.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481058/normal_60122b16c1b56.pdfIn PDF document text
    • https://cdn.sqhk.co/fejisedetu/gfjbiae/xawopevamudibogetaru.pdfIn PDF document text
    • http://makebugobiwuka.mypressonline.com/luvekojigo.pdfIn PDF document text
    • https://cdn.sqhk.co/fifusaji/JthfMhj/14843466684.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448124/normal_60314bd7eeaea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469350/normal_5fc5f5bb9d1a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475859/normal_601a1009a8e9a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415322/normal_6002e37ab68d3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401694/normal_5fefed6519110.pdfIn PDF document text
    • https://cdn.sqhk.co/gixotagokezu/qLhfii9/11384401630.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/livivuvuwugeb/sagosotogududesulasapi.pdfIn PDF document text
    • https://s3.amazonaws.com/kosamupim/statistical_learning_with_python.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/html_form_input_types_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/63068464760.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

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000113de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113DE 5156 bytes
SHA-256: 67006d45e4a48ae8050e7f2904f3a68ddd906abb65a337c0d0914853ced7a147
font_01_sfnt_off0001257f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1257F 11428 bytes
SHA-256: 49f884615d1177c425f57293d21e046537b8f52074f80e7851a8de9a219aae66
font_02_sfnt_off00014c83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C83 16376 bytes
SHA-256: fed6ef9213950b97ce7f8e93353a4c9d21881d1a29005445902a5c50aa8027df

Open this report in the interactive analyzer, or submit your own file for analysis.