Malicious PDF — malware analysis report

Static analysis result for SHA-256 c23a6dada6ea25bd…

MALICIOUS

PDF

140.3 KB Created: 2020-12-30 16:36:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 6298bedd9af52c6bb04d44a7e6fe8b43 SHA-1: 7f5359c3b9f1e6cd1ae70e270306ca23c0184bb1 SHA-256: c23a6dada6ea25bd05202884c4f97b9f114d591feba6874cdca730861206e13f
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://gettraff.ru/strik?utm_term=radiant+church+sun+city+voting+hours'. The ML classifier also flagged this PDF with a high probability of being malicious. While no scripts were extracted, the presence of a malicious URL strongly suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://gettraff.ru/strik?utm_term=radiant+church+sun+city+voting+hours In PDF document text
    • https://static.s123-cdn-static.com/uploads/4406806/normal_5fcd105e8dbb2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480899/normal_5fb3652bf0407.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486975/normal_5fcc3dfe27ea2.pdfIn PDF document text
    • https://cdn.sqhk.co/zawatilirip/lFidam4/bilogukisonavasasotimuw.pdfIn PDF document text
    • https://cdn.sqhk.co/zofagopipowi/cjaA3r6/33569757428.pdfIn PDF document text
    • https://cdn.sqhk.co/fawabanof/UkUfAhu/parexuvolime.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366630/normal_5fb7d5cb77df2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372085/normal_5fb5edaf1448d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501027/normal_5fe8ec7ddf2c7.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/4be63ec8-7aac-4190-837c-762e411ef1d7/borderline_kiilik_bozukluu_olan_birini_sevmek.pdfIn PDF document text
    • https://s3.amazonaws.com/gazitif/anatomy_book_bd_chaurasia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eefdd65f-b1e8-4f23-99d6-edd6e2fd038b/vaillant_turbomax_837e_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/falab.pdfIn PDF document text
    • https://s3.amazonaws.com/mipizaju/burra_katha_movie_audio_songs.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001c78a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C78A 5336 bytes
SHA-256: 68fbc53adc206b43b4736640eab8cfd4bbf41ad1ad84455302691867fce09bd1
font_01_sfnt_off0001d9b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D9B7 2448 bytes
SHA-256: b86bde638b9e107d32b1196ecf0d8ea41822326c58773264b91f79d1ede816ea
font_02_sfnt_off0001e369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E369 12556 bytes
SHA-256: 5086261d50c7904c65a0dcf66c10449bfc8f5463083b9b12ae502371d5ce06be
font_03_sfnt_off00020bd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20BD8 16164 bytes
SHA-256: 45cbdee8d0e9683c34ea7758bf990cbd3650d80547672a96691f419f916de5fb

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