Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee0c8cc065650f73…

MALICIOUS

PDF

74.5 KB Created: 2020-11-25 21:34:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 4a03efb3da68e6d16811d0a2a49cd5ec SHA-1: ef3f0361e3c5f7ef9a2d8ed7372cc1f73fa55aa0 SHA-256: ee0c8cc065650f733439e073456f77798ee51407f82a643e8cbd8cf23136503c
154 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, and contains a link to a known malicious redirector. The embedded URL, https://traffine.ru/123?utm_term=science+chapter+4+study+guide+answers, is likely used to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to 'science chapter 4 study guide answers'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=science+chapter+4+study+guide+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4427105/normal_5fb25cf3a7bc9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373753/normal_5f8df2f31ed4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375095/normal_5f98caf066f21.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/708a2cc2-6ae4-4ed0-b43a-9004e474ff3e/pukukinigagorifabefa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f93948c-7c04-41a1-9daf-ff33472f4ee0/31919167475.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/425b38d6-2b6e-47a8-8425-e436a78a075a/sowikuxamovonepezur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd0c5f78-a359-4dda-a3dd-9089e0a3452d/35086478157.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/tovor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/823536bd-a9b7-4b2b-9fff-d30a945c4411/utopiaguide_new_york.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77d2f538-7c48-4ea6-9c61-7928c68b9cd3/gigabyte_ga-_z270p-_d3.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/dutch_treat_strain_lineage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/328ae4d6-789b-4695-9d0c-7e94a57f7191/37958999301.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/suwisazuliv.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_off0000e60a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE60A 5688 bytes
SHA-256: 1dfefb00a242751325c63e4ead7fccd001f0d3631534a97f359f8b5f07471764
font_01_sfnt_off0000f986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF986 10344 bytes
SHA-256: b9a19c68e0d684e2eb516ee82defaa8ad426268504b5ce55c4cf5abf7778a777

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