Malicious PDF — malware analysis report

Static analysis result for SHA-256 72b28f0c45333bcd…

MALICIOUS

PDF

66.2 KB Created: 2020-11-28 10:49:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: af56e91d55a019f367a97a00efb4d566 SHA-1: 1d251212e541db3076d7c2c7144a4b51d65755e2 SHA-256: 72b28f0c45333bcdb881a444ca328703d5fe8ab3dcc889cfb02340d24594afee
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The ML classifier also flagged this PDF with a high score, and ClamAV detected it as 'Pdf.Phishing.Trojan'. The embedded URL is likely intended to lead the user to a phishing site or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://traffine.ru/123?utm_term=trauma+and+recovery+judith+herman+pdf+en+espa%25C3%25B1ol In PDF document text
    • https://cdn-cms.f-static.net/uploads/4378149/normal_5f9dd430d5331.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388413/normal_5f932124aa8ca.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/tinajabizoreguf/what_does_rotc_stand_for_in_college.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/grama_sachivalayam_key_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/pijonigori.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/c_piano_chords.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/rojezusebanuzi.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/fukowazafaveli.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/city_of_wichita_warrant_search_wichita_ks.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_off0000b4f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4F3 5676 bytes
SHA-256: f007b02c3905859619b3cc00e9099581fbfe8589ea5b4965c475bb71a8a12cdd
font_01_sfnt_off0000c7d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7D7 10344 bytes
SHA-256: a7373e20f29baef3da1553f9d93dd9830088d3f513acb8140ae9f1fec15f1ca4
font_02_sfnt_off0000eb57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB57 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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