Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ee8c8e0fc8143ad…

MALICIOUS

PDF

72.1 KB Created: 2020-12-10 17:40:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 67224c8aeb82554772aada361691aa2a SHA-1: 6818a417556db6688b39486c87e9a561c489f989 SHA-256: 8ee8c8e0fc8143ad3b943a7a5743964243250984f29e8a5d5775892f99a83338
96 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains an embedded URI pointing to a suspicious domain, likely for phishing purposes. Although no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to exploit vulnerabilities or redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=approach+avoidance+conflict+mcat PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368978/normal_5fa7e6f9a62f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379971/normal_5fb2bd1ac26ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456699/normal_5fa2fe5203a42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390324/normal_5f8e4f5747109.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367283/normal_5fc3a94fc3206.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387242/normal_5f9b45c93404b.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/rozebofukixus/61533425499.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0cbc7c6d964583621a279/t/5fc10093e6d49a06bbb58085/1606484116410/2014_volkswagen_passat_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/piradi/fjc_elementary_school_rocky_point_ny.pdfIn PDF document text
    • https://s3.amazonaws.com/zagubip/kawatetukolugejamewajesob.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/10582921323.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/patadofusazi.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/cfm_full_form_in_hvac.pdfIn PDF document text
    • https://s3.amazonaws.com/tubupejevomo/application_form_meaning_and_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_off0000def0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF0 5268 bytes
SHA-256: 5a24f3c125ca4025dc432f87536f5d203a851e40897bcccf816bc7b17a789b78
font_01_sfnt_off0000f0ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BA 10152 bytes
SHA-256: 52470b9120c56e98b5cdac5c9a2342deeee7240e45fec11f6ed9e24c3c7da6ee

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