Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc12de6ef70a0a03…

MALICIOUS

PDF

66.2 KB Created: 2020-12-22 20:42:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: eba610c5d1a84adf9e434c55ea2e3ab1 SHA-1: e675d7e3756d6cc36d92a29693a62cc628767ffc SHA-256: fc12de6ef70a0a03673d49af43b2d1adfccf9930b62a250948c3f20b9dd323f1
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, specifically as a phishing trojan. It contains an embedded URL that, when clicked, redirects to a suspicious domain. The document body, though heavily obfuscated, appears to contain keywords related to the URL, suggesting a phishing lure.

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://trafficel.ru/aws?utm_term=sea+cadet+uniform+shop PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426416/normal_5fad11ba23059.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420454/normal_5fd97b1b22681.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fdfd930ff074777c9861b5f/t/5fe013b1463d3b6c6f5ea51c/1608520625303/workforce_diversity_and_employee_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/5372042747.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/financial_budget_2018_india.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3782c68612547ed6e4934/t/5fc4eb9e145a8629dc4af453/1606740895138/57360780779.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/battlefield_5_size_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/44698908650.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/kelimedukaluwo.pdfIn PDF document text
    • https://s3.amazonaws.com/godewumazek/kunumawiba.pdfIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/ch_7_maths_class_12.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/free_sports_channel_tv_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f688cd9-f701-4212-9c1c-7ac2125cc912/58235182961.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_off0000c35f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC35F 5464 bytes
SHA-256: 2b12e74e73a66585d12e98c738092e76f31a4e4625128dda0a4cfd0e3898dc25
font_01_sfnt_off0000d5cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5CF 11152 bytes
SHA-256: 805051f423848c96f8ed63b5f7125b259f7af2661dd2387d35090873957edba5