Malicious PDF — malware analysis report

Static analysis result for SHA-256 56da7d1193abf98b…

MALICIOUS

PDF

67.9 KB Created: 2020-11-24 01:44:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 810a56ef9d4f186bf35b67ba4cd9f74b SHA-1: 766fce10d093952ef9d86d9549cf4cddb9916f58 SHA-256: 56da7d1193abf98b92405776209bb3ce86bd10ffbcc9b012354bbc81de9c4715
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that points to a suspicious domain, identified as malicious by ClamAV and a machine learning classifier. The document body, though heavily obfuscated, suggests a lure related to 'Iliopsoas stretches' to entice users to click the malicious link. The presence of an external URI and the ML classification strongly indicate a phishing or malware distribution 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://traffnew.ru/strik?utm_term=iliopsoas+stretches+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4467560/normal_5fa6b05b8942a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376878/normal_5fbbc90b7baae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447649/normal_5fb3b67f954f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412413/normal_5f9475fdaa126.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365653/normal_5fad9ee1ec96c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366661/normal_5f9e6f88da279.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416302/normal_5fb2a0eebd2e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390330/normal_5f9b115a95df0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448731/normal_5f9fa39ea319c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448328/normal_5fac4ffb23aed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450247/normal_5faa3f903e0db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366384/normal_5f8723a08902e.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/bakoloj/basic_electronics_multiple_choice_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/63616022374.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_off0000cdb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDB2 5180 bytes
SHA-256: 2d713b70406453e2c1aec59e6881b6336a416c8e9dceda995c64140964294750
font_01_sfnt_off0000df45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF45 10372 bytes
SHA-256: 59ba1733dad34e85d6f0c41696e10fd5cbfa0ce180fe06f1d75b1ed8ef4c66d4