Malicious PDF — malware analysis report

Static analysis result for SHA-256 1188738c9247ce0a…

MALICIOUS

PDF

63.4 KB Created: 2020-11-10 03:34:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 7faed241b11b798e01b586a1e94e2adb SHA-1: d6af099dab52469389e31e8b1d18c193d287b8ea SHA-256: 1188738c9247ce0a22ef98e01f3c0a6735cca427bbb8f2d4653af8265b377691
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffking.ru/strik?keyword=guitalele+chord+chart+pdf'. This indicates the document's primary purpose is to lure the user to a potentially malicious website. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient evidence for a phishing or malware distribution attack pattern.

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://traffking.ru/strik?keyword=guitalele+chord+chart+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4427538/normal_5f9cd048aff4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470689/normal_5fa7635fb07ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448731/normal_5f9e7fcf83404.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386622/normal_5f8f24ad14f62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402250/normal_5f90cac8d7298.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387218/normal_5f8e12b2bda3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370309/normal_5f8bbdcaac1bd.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/votawawo/http_injector_for_pc_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/289e52fb-da4b-4eb6-adb1-ed5a0743c4c0/2916029855.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/bitcoin_faucet_bot_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8f5c81a-1f6a-451a-91a7-16f7ecc1bf08/soundarya_lahari_mp3_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fa09ea2-8fba-4594-90ca-5b368c25d41c/mameneza.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/astm_a276_416.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/dmt_medical_testing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a309a15-c8a5-4e01-b370-3a470b1fbaa3/famous_nursery_rhymes_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3e317c6-617d-4c23-a097-7a56c354c133/11339064311.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_off0000ba52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA52 5096 bytes
SHA-256: 5680f9895cfededed8a1039f659a87cc0f91f5b5e6c5f7fc790fa05256be9e8e
font_01_sfnt_off0000cba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBA4 10912 bytes
SHA-256: 57cb9dd74c2dc1a1f99c2ffeacbb01e6831502e95221ec9a7586bfd1ec29c00c

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