Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e776b78f1709b60…

MALICIOUS

PDF

76.7 KB Created: 2021-05-09 04:28:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: cca0d89d3d79f6a6bd2c133faeb7d6d7 SHA-1: 2121ba415c1583bc1f52875fb496a49fc6482695 SHA-256: 4e776b78f1709b609e5ea9c56bde1f8a46dc5eb2effdfde02ff7dda4c924c351
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'baarspo.ru', which is likely used to deliver a secondary payload or redirect to a phishing site. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to exploit vulnerabilities or trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://baarspo.ru/strik?utm_term=dias+festivos+de+marzo+2020+mexico PDF link annotation
    • https://cdn.sqhk.co/xovepejegosi/cgLZ8h4/53207717846.pdfIn PDF document text
    • https://cdn.sqhk.co/lifupowaseli/fhhgijg/interrogative_pronouns_worksheets_for_grade_2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393209/normal_5ffc0b806b02b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444649/normal_5feda1a8f0b65.pdfIn PDF document text
    • https://cdn.sqhk.co/gufezitaxato/lIheFhj/drone_remote_control_and_receiver.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377414/normal_602d4201726c5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416791/normal_6003f28e83b95.pdfIn PDF document text
    • http://gawajix.iblogger.org/33273754388.pdfIn PDF document text
    • https://cdn.sqhk.co/liregevo/qJLjbeb/nufita.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379856/normal_6062ade97107e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389384/normal_603df8f5d38fa.pdfIn PDF document text
    • https://cdn.sqhk.co/zotipimesaza/ehelgeO/71039936985.pdfIn PDF document text
    • https://cdn.sqhk.co/vixukose/3awWZc0/pirakawusoga.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/toliwudalamem/ginuwalotivufopesapulow.pdfIn PDF document text
    • https://s3.amazonaws.com/ladiwuzetawedi/android_developer_consultant_jobs_in_india.pdfIn PDF document text
    • http://wosolebaxuwutux.rf.gd/office_ergonomics.pdfIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/49124682194.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/23311960861.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_off0000e9f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F4 5588 bytes
SHA-256: ca3f19cbaec72b6ba668cce25c6a4c84532ecbb6258165a597cce856e6c07efd
font_01_sfnt_off0000fcf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF7 11932 bytes
SHA-256: 64a1dec7608b99c105e3cba067c48494d4d06e8a020962367936ca1b2058cddc

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