Malicious PDF — malware analysis report

Static analysis result for SHA-256 d67432ddd289684a…

MALICIOUS

PDF

71.5 KB Created: 2020-12-31 14:53:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: f1c96678022c1889d6ef33d6248b880b SHA-1: b6b5e73cdf0c69b89a5d9f5a99c0ec593669b1b3 SHA-256: d67432ddd289684ab39b9eb064f88cec8cdc9704d43f87f76934109b0b19a771
154 Risk Score
Tags
free-cdn-ebook-manual-lure

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://traffmen.ru/strik?utm_term=voices+of+fire+choir+director'. This URL is the primary indicator of malicious intent, likely serving as a lure for phishing or to download further malicious content. The ML classifier also strongly flagged this PDF as malicious.

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
  • 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://traffmen.ru/strik?utm_term=voices+of+fire+choir+director In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370092/normal_5f9290dc39701.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375515/normal_5fd18a9f8e198.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475734/normal_5fc3ceb524cf5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411691/normal_5fb687988aaab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483591/normal_5fb9f751554d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417817/normal_5fe795304c447.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423714/normal_5fa17a9bacd45.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/43dad7e7-a26e-4353-b8b2-d967b73e980a/3433124877.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a008817-7761-4691-bcf8-c17f9951cf0c/mets_wallpaper_android.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/que_es_el_contexto_aulico.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c440fe4-c409-4880-a0f7-dd4346c7b422/how_to_unshare_a_video_on_google_drive.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/sulupaji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c819572-6f97-40f1-853e-4cb15bdcc896/xototiditovejidaxejoduji.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/insider_trading_in_india.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_off0000dc4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC4E 4832 bytes
SHA-256: 8de283741120d2a610caec92df34dd6405c330f15b52f8817a01dd158105ecf9
font_01_sfnt_off0000ecc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC3 10544 bytes
SHA-256: 40c04ae4dde81cb60ce89bb68782b58dd72b4fa9727d317484e9285264303309

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