Malicious PDF — malware analysis report

Static analysis result for SHA-256 53ec10c77e226caa…

MALICIOUS

PDF

69.8 KB Created: 2021-02-15 19:29:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 07c8d894af8bc87e355cbfa0acab9335 SHA-1: c61f3a2cee823500506f55a200d3fd53a1929882 SHA-256: 53ec10c77e226caa864273ac63c1f3d0d3fd007b9246d3f4a4bc6e7bf1971bd1
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 infrastructure, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support this assessment. Although the document body is heavily obfuscated, the presence of the malicious URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://crophysi.ru/wix?keyword=darker+shades+of+elise+official+trailer In PDF document text
    • https://cdn.sqhk.co/pepupiribojo/jgcRqjb/bomobazo.pdfIn PDF document text
    • https://cdn.sqhk.co/gudijupimeb/hgufW10/aliexpress_straight_human_hair_wigs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475727/normal_6009d21845901.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417523/normal_5fd911d8c39af.pdfIn PDF document text
    • https://cdn.sqhk.co/figakeves/4jehe4n/2482836483.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472763/normal_5fd09d9ad82d4.pdfIn PDF document text
    • https://cdn.sqhk.co/jisaside/lk53xgj/41881617925.pdfIn PDF document text
    • https://cdn.sqhk.co/zanudiwageg/ge4Bihl/whatsapp_auto_reply_bot_python.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/jinabom/buxoxe.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/sodoz.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/tea_export_business_plan_template.pdfIn PDF document text
    • https://s3.amazonaws.com/xomepixo/android_one_and_stock_android.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/90976577257.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/15076088431.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/antibiotic_resistance_lab_answer_key.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_off0000d4f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4F8 5172 bytes
SHA-256: 1ba2908f368f2c779aa00a89c05b19f5f69a1ad36d0a05bc95af914ba05616bd
font_01_sfnt_off0000e68f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE68F 10360 bytes
SHA-256: 1771245f2b721a18558b34c71a16cf2112a91b808f02be06e8712148d897beea

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