Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9a0c4dab46eb31c…

MALICIOUS

PDF

71.6 KB Created: 2020-11-17 23:16:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 504874083c7f758f53d926d06127d371 SHA-1: d542b08e9ef865a6dc8da64f94583e5847160562 SHA-256: f9a0c4dab46eb31c3a1511097c05e42902d823016649ee519101b26bc688bde8
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://traffine.ru/123?utm_term=dog+named+benny'. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URL suggest an attempt to lure the user to a malicious site, consistent with phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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=dog+named+benny In PDF document text
    • https://cdn-cms.f-static.net/uploads/4378836/normal_5f8ea9928dff4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418379/normal_5fad5c32c43a2.pdfIn PDF document text
    • https://nonililuwadev.weebly.com/uploads/1/3/4/3/134354571/395293fba5b08.pdfIn PDF document text
    • https://netewubo.weebly.com/uploads/1/3/4/3/134325031/rizuwixanarafisumawo.pdfIn PDF document text
    • https://wijimoki.weebly.com/uploads/1/3/4/4/134485243/c5ffdc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467306/normal_5fad8ca49bd73.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/98346b93-148a-4c74-88e8-b2fbddeba50b/kazisofesometiredodal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9980fad4-4e82-48a1-8729-5caa33a6238b/topology_munkres_solutions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1061037c-63d6-43e2-9c41-f4ecfff06120/powupumaroludesamezabuw.pdfIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/american_pie_2_full_movie_filmyzilla.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD188 5080 bytes
SHA-256: f3b4fc9cce05f37a981caa6ce6a22e495c8b101e78897047ff6b146e12d05c6a
font_01_sfnt_off0000e2cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CD 3720 bytes
SHA-256: 6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed
font_02_sfnt_off0000ee30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE30 10380 bytes
SHA-256: 3e513d3ea71cfa426884e3a4f6b9689ea2df4239942a0ddd688815e99858da56

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