Malicious PDF — malware analysis report

Static analysis result for SHA-256 58bbf84071f18ac9…

MALICIOUS

PDF

77.8 KB Created: 2021-02-25 16:58:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 7c20e38e36b0f7f48d9d35f243e52e3e SHA-1: 108f0474afabdb3e9ecfb664e57c36073414ffe1 SHA-256: 58bbf84071f18ac937db166fe8865cd0cef0bff1e82ed953d20d49a2e90a4f24
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that leads to a phishing site, disguised as interview questions. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were directly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious resource, likely for credential harvesting or further malware delivery.

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://leonvi.ru/123?utm_term=interview+questions+and+answers+for+secretary+post PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386620/normal_602c3d8327b86.pdfIn PDF document text
    • https://cdn.sqhk.co/xivomojuf/7lhaji2/dragon_mod_1._16._1.pdfIn PDF document text
    • http://tulomodev.getenjoyment.net/how_to_put_graco_stroller_back_together.pdfIn PDF document text
    • http://iglivesupportteam.com/viwejamalovakat7x3tf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405652/normal_603430e9c1eac.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/tezofuretejom/angela_carter_the_werewolf.pdfIn PDF document text
    • http://podozedomusajor.epizy.com/10896466062.pdfIn PDF document text
    • http://pufupivati.epizy.com/macos_catalina_public_beta_4.pdfIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/23928925341.pdfIn PDF document text
    • http://lizolubemerawi.epizy.com/simple_ecommerce_joomla_templates.pdfIn PDF document text
    • http://zuzidonul.epizy.com/gisigipudebupalira.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/cbt_worksheets_for_kids.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/manazulivubolupupuxin.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_off0000f4c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C4 5432 bytes
SHA-256: b38669583ababeb6c7b3ababe8c6169412a76b3da50274c0d745db67763c2ec4
font_01_sfnt_off0001076f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1076F 10120 bytes
SHA-256: 1101dd77d89ae133a4c2b1a260c86a1bc768b4ad33505b9b478c8783eeec52d3

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