Malicious PDF — malware analysis report

Static analysis result for SHA-256 febf4884003caba5…

MALICIOUS

PDF

73.7 KB Created: 2021-01-15 04:44:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 72b87a9863e43f7712644af4464c7296 SHA-1: 7e381813a5fde59093ba425bfa314c80ea25e632 SHA-256: febf4884003caba51e86a1fecbdb4ed7902a36e47f8767e8c29e15e00e6d2a6e
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, indicating a phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were extracted, the presence of a malicious URL points to a phishing lure, likely delivered as a spearphishing attachment.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://gettraff.ru/123?utm_term=pse+recurve+bow+reviews In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367301/normal_5f8b072e93362.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427282/normal_5fde71a06cb25.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484612/normal_5fcad6f982326.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481665/normal_5fc4dfec5b065.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471236/normal_5fa5c53c2a867.pdfIn PDF document text
    • https://cdn.sqhk.co/nomavunut/E7sCjh2/icd_10_code_bilateral_thoracic_outlet_syndrome.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470533/normal_5ff517152da77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381762/normal_5fd63799e435d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393361/normal_5f93de60d589b.pdfIn PDF document text
    • https://site-1168172.mozfiles.com/files/1168172/501_free_new_escape_games_101.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445343/normal_5fe7741153bab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/dekogamik/fazafojazuboturuku.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD793 4540 bytes
SHA-256: 2623efed9ae95a5bb9b171d2790a2cfcb4910ecb216aedbec74e647f6c058fa3
font_01_sfnt_off0000e71a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE71A 11372 bytes
SHA-256: d11fcd327020840df79853109bf7a04e15a7377859973ea950d3b18adaa00253
font_02_sfnt_off00010c62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C62 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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