Malicious PDF — malware analysis report

Static analysis result for SHA-256 54410e59c8238dc3…

MALICIOUS

PDF

70.6 KB Created: 2020-12-04 14:56:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: dda8cc763bb53b540ff68df313208e8d SHA-1: d8027e8d20dbadd0baf32a49b63ab7b262795e79 SHA-256: 54410e59c8238dc337f05302dc269e74e69b022833ef2d809300dbd1ef8dba36
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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=best+buy+knoxville+tn+north+peters In PDF document text
    • https://cdn-cms.f-static.net/uploads/4480749/normal_5fbcc4e617aeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367310/normal_5f87ad8fefa2d.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/penale/34958994557.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7d14dd7-1262-448c-a1d9-a36c95449d34/the_glass_bead_game_horn_concerto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79a709d1-7d3d-491b-a800-2e75bf9fdff3/composition_of_functions_worksheet_doc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74087c16-af29-437b-8522-8da470b2a709/47864338269.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/374f0e3f-5896-4f96-aada-75376af28c2b/90972752323.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdee383c02f22b9dd206fc/1606282808438/2001_hyundai_accent_repair_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08405a28-7597-4f40-bfaf-feefd601bd69/8293196545.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc36b9c403f5353fda5c89f/t/5fc9ca2c87b36f46d4ffe839/1607060012358/62670099407.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39e4e496-aabd-497b-ac8b-1b5e357056f2/geriw.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf1b518e72e5fdb9bd38a/1606283702108/xewozewurivewipan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3046cc93-3433-41d3-90e0-07c9011f0b10/kexowiw.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c19e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC19E 5180 bytes
SHA-256: b74c71a2c29ee2dcaf69e697e015b18f8cefa49fa8b2f8bb629837d8f1c6547d
font_01_sfnt_off0000d348.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD348 11048 bytes
SHA-256: c5822795e11d9a2d09dc596881212bfa0dcdb9d1338e1dc66662e7595e0f9db8
font_02_sfnt_off0000f825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF825 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15

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