Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cfc3ca54ae5c7e0…

MALICIOUS

PDF

66.5 KB Created: 2020-12-18 01:49:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: c9864f0d43bc54636e3b35339c8d0c0d SHA-1: 14462769766ca0bdc6e405004ec2f542094f94fb SHA-256: 9cfc3ca54ae5c7e050e92258388c3925e405f82bb96a0bfd74f3ba5f02195bc7
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL points to a suspicious domain, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic indicate the potential for malicious content execution.

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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffe.ru/aws?utm_term=xsplit+gamecaster+mac PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4372682/normal_5fb8be4b45732.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473938/normal_5fbb5c8978128.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390071/normal_5f9a756063694.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411493/normal_5fcebe75a9578.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc1321e2e34347c7045f8f9/t/5fc35ff73485235c86321aef/1606639607337/68257149572.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/english_year_5_sjk_textbook.pdfIn PDF document text
    • https://s3.amazonaws.com/vikukinumet/bluebook_legal_citation.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f6bd5687f52b6b817d01/t/5fd1b99023f2866aa3883600/1607580049270/74840469525.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd0d758cb11b25c09e240b/1606225270566/74913975529.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/29008909471.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2e88de2fce462bc991529/t/5fcaeb9e85bc3a28a6007f1a/1607134110545/smart_care_hand_sanitizer_fda.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcf6ff9181af13ce2772f75/t/5fd65526ab1a676c728c40c5/1607882025090/uc_browser_new_version_2018_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/pojojagajevuxa/sigebonekajutofik.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdff2ea97599144ebddc53/1606287151185/shoedazzle_promo_code_january_2020.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_off0000c847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC847 5232 bytes
SHA-256: 29bc455fd087dede26718c2aff85e06fcbd9e0b972a94be21766099a5bcf0e3d
font_01_sfnt_off0000d9fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FC 10476 bytes
SHA-256: 37fe17aa54867b2d175913e818987c94840278523974072484ff40808e2f5f04

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